GZA Eni^ineer^ and

GeoEnvironmental Inc Scientists

oz 204 Spring Hill Road

Trumbull Conncaicut

06611

203-268-0808

YX 20J-268-4772

A Subsidiai^ of GZ

GeoEnvironmental

Technologies Inc

294294 SDMS DocID

September 11 1991 0 CTR_

File No 5012430

US EPA Region 1 HECCan3 90 Canal Street Boston Massachusetts 02114

Attention Ms Almerinda Silva

Dear Ms Silva

As requested by the Town of Southington we are providing the enclosed report Pilot Venting Program Old Turnpike Road Southington Connecticut to you for informational purposes The pilot venting program was initiated by the Town to assess possible methodology to extract methane beneath buildings in the event necessary and for no other purpose

As you are aware methane issues are not part of the Old Southington Landfill RIFS thus this report is for background informational purposes only As such should you have any questions please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

Kathleen A Cyr ^ Associate-in-Charge

KACad

cc Town of Southington Pepe amp Hazard

111 hmplmcr M h V H

PILOT VENTING PROGRAM OLD TURNPIKE ROAD SOUTHINGTON CONNECTICUT

PREPARED FOR Town Managers Office 75 Main Street Southington Connecticut 06489

PREPARED BY GZA GeoEnviroimiental Inc 204 Spring Hill Road Trumbull Coimecticut 06611

i September 1991 File No 50359

Copyrightreg 1991 GZA GeoEnviroimiental Inc L I

GZA Engineers and

GeoEnvironmental Inc Scientists

GZ

204 Spring Hill Road

Trumbull Connecticut

06611

203-268-0808

FAX 203-268-4772

A Subsidiary of GZA

GeoEnvironmental

Technologies Inc

September 10 1991 File No 50359

Town Managers Ofampce 75 Main Street Southington Connecticut 06489

Attention Mr John Weichsel L

m Dear Mr Weichsel

At the request of the Town of Southington GZA GeoEnviroimiental Inc and GZA Remediation Inc have conducted a pilot methane extraction program to assess the potential feasibility of extracting methane from soil gas above the Old Turnpike Road Landfill (aka Old Southington Landfill) in Southington Connecticut The purpose of this report was to assess whether extraction via a trench system is a potentially viable technology to limit potential methane migration into existing structures from the subsurface in the event that such actions become warranted Results of this pilot program are discussed below This report is subject to the limitations contained in Appendix Ashy

BACKGROUND

Methane gas is generated primarily by decomposition of organic matter in a low oxygen enviroimient Normally the methane gas diffuses through the pervious soils above the disposed organic material eventually dispersing into the atmosphere However if a low permeability or an impervious layer of soil pavement concrete or ^ gtshyother structures restricts the migration of the gas it can become trapped below this ^ ^ layer pr-

Previous Gas Testing by DEP

CAn investigation of gases at the former Old Turnpike Road Landfill was initially c conducted on January 18 1982 by Department of Environmental Protection (DEP) officials Measurements of combustible gas were taken in and aroimd four buildings located on the landfill utilizing a Scott D-15 Gas Tester calibrated on natural gas No gas was detected within the four buildings tested however readings ranging from 2 to 3-V2 gas were recorded beneath the concrete floor slab located at 455 Old Tmnpike Road The DEP report notes that these values are below the lower explosive limit of methane

An tqual Opponunity Employer M F VH I

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Although no natural gas was reportedly detected by DEP within the buildings tested quantities of gas were recordedfiom the soils adjacent to building fotmdations The gas measurements reported by DEP outside of the buildings were as follows

Location (See Figure 1) Readings - Combustible Gas

bull 455 Old Turnpike Road 0-8 bull 477 Old Turnpike Road 0-36 bull 495 Old Turnpike Road 0-34 bull uimumbered sheet metal building south

of 495 0-44

Gas Testing by GZA

At the request of the Town of Southington GZA performed a two phase gas testing program at the Old Turnpike Road Landfill First readings of methane concentration were taken on November 27 and December 3 1985 by GZA personnel using a Scott Model D-15 Model Gas Tester calibrated to methane Readings were taken in the interiors of 455 477 and 495 Old Turnpike Road Southington These readmgs summarized on Table 1 did not indicate detectable quantities of methane in open areas of any building tested However within the RV amp Sons welding shop (455 Old Turnpike Road) air-borne concentrations of methane up to 23 were detected m a floor crack in the southwest comer of the building In addition readings of 12 and 02 methane in air were obtained from a (previously closed) closet and a bathroom area respectively These readings were taken after the buildmg had been empty and locked for approximately 36 hoiu-s The highest detected air concentration of methane (23) is below the lower explosive limit (LEL) of methane in air (LEL = 53) The presence of methane vapors beneath the RV amp Sons welding shop agreed with past DEP findings

As a second phase of methane assessment four borings (B-1 B-2 B-3 B-4) were drilled on March 201986 by East Coast Drilling Inc of Wallingford Connecticut at locations designated by GZA Borings were drilled using hollow-stem augers and a gas monitoring well was installed in each boring Gas monitoring wells consist of a 2-inch polyvinyl chloride (PVC) screen and casing Each well screen was placed from 3 feet below ground to the base of the boring The screens are located such that gases viithin both saturated and unsaturated material can enter the well screen Each gas monitoring well was capped with a PVC push-on cap to limit atmospheric influence in the well and promote a confined environment

Measurements of explosive gases including methane were taken at these gas monitoring wells and in nearby groundwater monitor wells Readings were initially taken by GZA on four occasions in 1986 Results are presented on Table 2 along with the instrumentation used to measure methane

The results presented on Table 2 show that methane was not detected in groimdwater (S- ^ n^onitoring wfllii Invntfid beyond the Ijinits of the landfill Methane was detected at l Cconcentration of 01 in air within gas momtormg well B-1 at concentrations of 5 to 20 in gas monitoring well B-2 and at concentrations of 21 to 32 and 61 to 66 in gas monitoring wells B-3 and B-4 respectively The methane readings within the B-series gas monitoring wells represent the concentration of methane present in the soil pore space under conditions measured at the time of testing

The concentrations of methane detected in the B-series wells are similar or higher ozv than methane concentrations reported by DEP during sampling performed in November 1981 While the method of sampling by DEP was not specified and likely differed from GZAs procedure the results in generaL-indkate--tbat a prevalent condition of gas entrapment methane generation or both is present beneath the gr^Hgimface at least in the_arfia-teste4- lt^^nr jh jjx m wgc rinsed and capped sinceabout 1967 results seemed to indicate that methane was notfireely venting to the atmosphere

Based on the studies conducted and observations made in 1985 to 1986 GZA concluded that measurable concentrations of meplusmnane were present in floor crack in one building on the former landfill and was present within the pore space in soils beneath the land surface ^

It is om understanding that the Town of Southington had advised land owners on the landfill to include venting systems within each building constructed in this area

Based on the findings discussed above GZA recommended that a test system consisting of one recovery trench initially be installed at the landfill area to assess methane recovery methodology via a trench and efficiency and carbon canister breakthrough patterns

A conceptual design for a pilot system was prepared by Environmental Applications Inc (now GZA Remediation) in June of 1987 as presented in Appendix B

J PILOT VENT SYSTEM SUMMARY

Between June of 1987 and June of 1990 land owner permissions to install the trench J and pilot systems were obtained In addition permissionfirom the Connecticut DEP

Solid Waste Management Division was sought and obtained to disturb the landfill siuface and install the system (see Appendix C for related documentation) The need for an air discharge permit related to pilot system operations was also investigated and was determined to be unnecessary by DEPs Air Compliance Unit (see Appendix C)

In JulyAugust 1990 the extraction trench was installed behind 493 Old Turnpike Road Southington a facility now used by the Town Parks and Recreation

T^ OZV

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1

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Department The trench location is shown on Figure 1 The system design was substantially the same as that first proposed to the Town in June 1987 by Environmental AppUcations Inc (now QuLK Remediation Inc)

The design consisted of an arc-shaped trench approximately 300 feet in length The trench was excavated with the approval of the Coimecticut Department of Environmental Protection Solid Waste Unit to the top of the refuse layer As shown in Photographs 1 and 2 in Appendix D refuse and debris are evident in the excavated materials

Approximately six inches of gravel was placed in the base of the trench as shown in Photograph 2 Perforated piping and vent risers were then installed as shown in Photographs 3 and 4 Twelve to twenty-four inches of gravel was placed on top of the piping and the surface of the gravel was sealed with 6 mil polyethylene sheeting The sheeting was extended up the sides of the trench and approximately ten feet to either side of the trench to limit short circuiting of air from the ground surface Finally excavated cover soils materials were used to backfill the trench to grade and cover the sheeting on either side

Pilot System Venting Test

The pilot system consisted of the extraction trench approximately 300 feet in length extending across the rear of 493 Old Turnpike Road to the edge of 477 Old Turnpike Road and an extraction system (vacuum blower activated carbon controls etc) located in a small enclosure nearby to draw a vacuum on the center of the trench The trench mcluded ten vertical access ports and three nearby sets of piezometers to measure methane concentrations (as LEL) and vacuum at different depths and at different distances (0 5 10 and 15 feet) fi-om the trench A schematic

system layout is shown on Figure 2 attached

Controls built into the pilot system included gauges to continuously measure combustible gases as a percentage of the lower explosive limit (LEL)^ before and after the system blower and a controller to monitor LEL levels and automatically shut

the system down in the event that LEL levels exceeded a specified limit The unit was calibrated to shut-down extraction at 30 LEL as a conservative safety precaution

1 Measurements of combustible gas are reported as a percentage of the lower explosive limit (LEL) of pentane which is the gas to which the device is calibrated Dividing these readings by a conversion factor of 17 veilos provides approximate concentrations for methane The explosive concentration range of methane in air is between 5 and 15 percent 5 percent represents the LEL and 15 percent represents the upper explosive limit (UEL)

GZV

Prior to start-up of the system measurements were made at the ten access ports for volatile organic compoimds using an 117 eV lamp HNx model photoionization detector (PID) and explosive gases and oxygen using a MSA Model 260 Combustible Gas Meter as percentages in the atmosphere tested Table 4 provides the results of those measurements

During the time between trench installation and system start-up methane accumulated in the trench to the point where the levels of methane extracted exceeded 100 of the lower explosive limit LEL when the system was started up on August 10 1990 Since the system could not operate safely when extracting soil gas from the trench only a bypass valve was opened to mix ambient air into the soil gas for dilution From August 10 to September 4 the extraction trench was flushed until equihbriiun conditions were reached at which time the vacuum blower was extracting air from the trench directiy without ambient air bypass At that time the LEL meters on the system read 3-5 of LEL consistently

The system was monitored frequently during initial start-up and throughout the period of the pilot-test program Field summaries containing system operating parameters during the pilot test are presented in Appendix D

On August 201991 soil vapor samples were obtainedfi-om a system mfluent port and an effluent port located after the carbon treatment system just prior to discharge to ambient air Samples were obtained m two tedlar bags from the ports using a small sampling pump The samples were delivered to Ceimic Corporation of Narragansett Rhode Island for analysis of EPA Method 6248240 compounds An ambient air sample blank prepared by the laboratory accompanied the samples The laboratory report is provided in Appendix E The ambient air sample bljink contained 02 mgm^ of methylene chloride The Air Influent sample reportedly contained 07 mgm^ of acetone the air effluent sample reportedly contained 11 mgm^ of trans-13shydichloropropene and 05 mgm^ of 2-hexanone No other compounds were reportedly detected Detected values are well below (gt 90 less than) short-term (STEL) and long-term (TWA) threshold limit values (TLVs) established as exposure guidelines by ACGIH Glues used in construction of the extraction system may have contributed to detected levels At the reported levels VOC emissions were approximately 00005 poimds per hour well below the allowable discharge limit of 04 lbhour for detected compounds by Connecticut DEP Air Regulations During system operations VOC emissions were monitored periodically with a photoionization detector no PID meter response was noted

At equilibrium the extraction system operated at approximately 75 cubic feet per minute (cfm) with a suction of -28 to -32 inches of water ( H2O) On September 21 a complete set of piezometer readings was taken using a sensitive inclined manometer to measure vacuum with plusmn0005 HjO accuracy The readings indicated that the vacuum in the manifold was maintained at -013 HjO At piezometer points A B

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J ~1 ] ~

]

]

J

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1 1 1

and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

GZA Engineers and

GeoEnvironmental Inc Scientists

GZ

204 Spring Hill Road

Trumbull Connecticut

06611

203-268-0808

FAX 203-268-4772

A Subsidiary of GZA

GeoEnvironmental

Technologies Inc

September 10 1991 File No 50359

Town Managers Ofampce 75 Main Street Southington Connecticut 06489

Attention Mr John Weichsel L

m Dear Mr Weichsel

At the request of the Town of Southington GZA GeoEnviroimiental Inc and GZA Remediation Inc have conducted a pilot methane extraction program to assess the potential feasibility of extracting methane from soil gas above the Old Turnpike Road Landfill (aka Old Southington Landfill) in Southington Connecticut The purpose of this report was to assess whether extraction via a trench system is a potentially viable technology to limit potential methane migration into existing structures from the subsurface in the event that such actions become warranted Results of this pilot program are discussed below This report is subject to the limitations contained in Appendix Ashy

BACKGROUND

Methane gas is generated primarily by decomposition of organic matter in a low oxygen enviroimient Normally the methane gas diffuses through the pervious soils above the disposed organic material eventually dispersing into the atmosphere However if a low permeability or an impervious layer of soil pavement concrete or ^ gtshyother structures restricts the migration of the gas it can become trapped below this ^ ^ layer pr-

Previous Gas Testing by DEP

CAn investigation of gases at the former Old Turnpike Road Landfill was initially c conducted on January 18 1982 by Department of Environmental Protection (DEP) officials Measurements of combustible gas were taken in and aroimd four buildings located on the landfill utilizing a Scott D-15 Gas Tester calibrated on natural gas No gas was detected within the four buildings tested however readings ranging from 2 to 3-V2 gas were recorded beneath the concrete floor slab located at 455 Old Tmnpike Road The DEP report notes that these values are below the lower explosive limit of methane

An tqual Opponunity Employer M F VH I

oz

J

]

Although no natural gas was reportedly detected by DEP within the buildings tested quantities of gas were recordedfiom the soils adjacent to building fotmdations The gas measurements reported by DEP outside of the buildings were as follows

Location (See Figure 1) Readings - Combustible Gas

bull 455 Old Turnpike Road 0-8 bull 477 Old Turnpike Road 0-36 bull 495 Old Turnpike Road 0-34 bull uimumbered sheet metal building south

of 495 0-44

Gas Testing by GZA

At the request of the Town of Southington GZA performed a two phase gas testing program at the Old Turnpike Road Landfill First readings of methane concentration were taken on November 27 and December 3 1985 by GZA personnel using a Scott Model D-15 Model Gas Tester calibrated to methane Readings were taken in the interiors of 455 477 and 495 Old Turnpike Road Southington These readmgs summarized on Table 1 did not indicate detectable quantities of methane in open areas of any building tested However within the RV amp Sons welding shop (455 Old Turnpike Road) air-borne concentrations of methane up to 23 were detected m a floor crack in the southwest comer of the building In addition readings of 12 and 02 methane in air were obtained from a (previously closed) closet and a bathroom area respectively These readings were taken after the buildmg had been empty and locked for approximately 36 hoiu-s The highest detected air concentration of methane (23) is below the lower explosive limit (LEL) of methane in air (LEL = 53) The presence of methane vapors beneath the RV amp Sons welding shop agreed with past DEP findings

As a second phase of methane assessment four borings (B-1 B-2 B-3 B-4) were drilled on March 201986 by East Coast Drilling Inc of Wallingford Connecticut at locations designated by GZA Borings were drilled using hollow-stem augers and a gas monitoring well was installed in each boring Gas monitoring wells consist of a 2-inch polyvinyl chloride (PVC) screen and casing Each well screen was placed from 3 feet below ground to the base of the boring The screens are located such that gases viithin both saturated and unsaturated material can enter the well screen Each gas monitoring well was capped with a PVC push-on cap to limit atmospheric influence in the well and promote a confined environment

Measurements of explosive gases including methane were taken at these gas monitoring wells and in nearby groundwater monitor wells Readings were initially taken by GZA on four occasions in 1986 Results are presented on Table 2 along with the instrumentation used to measure methane

The results presented on Table 2 show that methane was not detected in groimdwater (S- ^ n^onitoring wfllii Invntfid beyond the Ijinits of the landfill Methane was detected at l Cconcentration of 01 in air within gas momtormg well B-1 at concentrations of 5 to 20 in gas monitoring well B-2 and at concentrations of 21 to 32 and 61 to 66 in gas monitoring wells B-3 and B-4 respectively The methane readings within the B-series gas monitoring wells represent the concentration of methane present in the soil pore space under conditions measured at the time of testing

The concentrations of methane detected in the B-series wells are similar or higher ozv than methane concentrations reported by DEP during sampling performed in November 1981 While the method of sampling by DEP was not specified and likely differed from GZAs procedure the results in generaL-indkate--tbat a prevalent condition of gas entrapment methane generation or both is present beneath the gr^Hgimface at least in the_arfia-teste4- lt^^nr jh jjx m wgc rinsed and capped sinceabout 1967 results seemed to indicate that methane was notfireely venting to the atmosphere

Based on the studies conducted and observations made in 1985 to 1986 GZA concluded that measurable concentrations of meplusmnane were present in floor crack in one building on the former landfill and was present within the pore space in soils beneath the land surface ^

It is om understanding that the Town of Southington had advised land owners on the landfill to include venting systems within each building constructed in this area

Based on the findings discussed above GZA recommended that a test system consisting of one recovery trench initially be installed at the landfill area to assess methane recovery methodology via a trench and efficiency and carbon canister breakthrough patterns

A conceptual design for a pilot system was prepared by Environmental Applications Inc (now GZA Remediation) in June of 1987 as presented in Appendix B

J PILOT VENT SYSTEM SUMMARY

Between June of 1987 and June of 1990 land owner permissions to install the trench J and pilot systems were obtained In addition permissionfirom the Connecticut DEP

Solid Waste Management Division was sought and obtained to disturb the landfill siuface and install the system (see Appendix C for related documentation) The need for an air discharge permit related to pilot system operations was also investigated and was determined to be unnecessary by DEPs Air Compliance Unit (see Appendix C)

In JulyAugust 1990 the extraction trench was installed behind 493 Old Turnpike Road Southington a facility now used by the Town Parks and Recreation

T^ OZV

i M

1

Ij

mdashJ

1shy

Department The trench location is shown on Figure 1 The system design was substantially the same as that first proposed to the Town in June 1987 by Environmental AppUcations Inc (now QuLK Remediation Inc)

The design consisted of an arc-shaped trench approximately 300 feet in length The trench was excavated with the approval of the Coimecticut Department of Environmental Protection Solid Waste Unit to the top of the refuse layer As shown in Photographs 1 and 2 in Appendix D refuse and debris are evident in the excavated materials

Approximately six inches of gravel was placed in the base of the trench as shown in Photograph 2 Perforated piping and vent risers were then installed as shown in Photographs 3 and 4 Twelve to twenty-four inches of gravel was placed on top of the piping and the surface of the gravel was sealed with 6 mil polyethylene sheeting The sheeting was extended up the sides of the trench and approximately ten feet to either side of the trench to limit short circuiting of air from the ground surface Finally excavated cover soils materials were used to backfill the trench to grade and cover the sheeting on either side

Pilot System Venting Test

The pilot system consisted of the extraction trench approximately 300 feet in length extending across the rear of 493 Old Turnpike Road to the edge of 477 Old Turnpike Road and an extraction system (vacuum blower activated carbon controls etc) located in a small enclosure nearby to draw a vacuum on the center of the trench The trench mcluded ten vertical access ports and three nearby sets of piezometers to measure methane concentrations (as LEL) and vacuum at different depths and at different distances (0 5 10 and 15 feet) fi-om the trench A schematic

system layout is shown on Figure 2 attached

Controls built into the pilot system included gauges to continuously measure combustible gases as a percentage of the lower explosive limit (LEL)^ before and after the system blower and a controller to monitor LEL levels and automatically shut

the system down in the event that LEL levels exceeded a specified limit The unit was calibrated to shut-down extraction at 30 LEL as a conservative safety precaution

1 Measurements of combustible gas are reported as a percentage of the lower explosive limit (LEL) of pentane which is the gas to which the device is calibrated Dividing these readings by a conversion factor of 17 veilos provides approximate concentrations for methane The explosive concentration range of methane in air is between 5 and 15 percent 5 percent represents the LEL and 15 percent represents the upper explosive limit (UEL)

GZV

Prior to start-up of the system measurements were made at the ten access ports for volatile organic compoimds using an 117 eV lamp HNx model photoionization detector (PID) and explosive gases and oxygen using a MSA Model 260 Combustible Gas Meter as percentages in the atmosphere tested Table 4 provides the results of those measurements

During the time between trench installation and system start-up methane accumulated in the trench to the point where the levels of methane extracted exceeded 100 of the lower explosive limit LEL when the system was started up on August 10 1990 Since the system could not operate safely when extracting soil gas from the trench only a bypass valve was opened to mix ambient air into the soil gas for dilution From August 10 to September 4 the extraction trench was flushed until equihbriiun conditions were reached at which time the vacuum blower was extracting air from the trench directiy without ambient air bypass At that time the LEL meters on the system read 3-5 of LEL consistently

The system was monitored frequently during initial start-up and throughout the period of the pilot-test program Field summaries containing system operating parameters during the pilot test are presented in Appendix D

On August 201991 soil vapor samples were obtainedfi-om a system mfluent port and an effluent port located after the carbon treatment system just prior to discharge to ambient air Samples were obtained m two tedlar bags from the ports using a small sampling pump The samples were delivered to Ceimic Corporation of Narragansett Rhode Island for analysis of EPA Method 6248240 compounds An ambient air sample blank prepared by the laboratory accompanied the samples The laboratory report is provided in Appendix E The ambient air sample bljink contained 02 mgm^ of methylene chloride The Air Influent sample reportedly contained 07 mgm^ of acetone the air effluent sample reportedly contained 11 mgm^ of trans-13shydichloropropene and 05 mgm^ of 2-hexanone No other compounds were reportedly detected Detected values are well below (gt 90 less than) short-term (STEL) and long-term (TWA) threshold limit values (TLVs) established as exposure guidelines by ACGIH Glues used in construction of the extraction system may have contributed to detected levels At the reported levels VOC emissions were approximately 00005 poimds per hour well below the allowable discharge limit of 04 lbhour for detected compounds by Connecticut DEP Air Regulations During system operations VOC emissions were monitored periodically with a photoionization detector no PID meter response was noted

At equilibrium the extraction system operated at approximately 75 cubic feet per minute (cfm) with a suction of -28 to -32 inches of water ( H2O) On September 21 a complete set of piezometer readings was taken using a sensitive inclined manometer to measure vacuum with plusmn0005 HjO accuracy The readings indicated that the vacuum in the manifold was maintained at -013 HjO At piezometer points A B

ozv 1

-nl

J ~1 ] ~

]

]

J

]

1 1 1

and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

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February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

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(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

oz

J

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Although no natural gas was reportedly detected by DEP within the buildings tested quantities of gas were recordedfiom the soils adjacent to building fotmdations The gas measurements reported by DEP outside of the buildings were as follows

Location (See Figure 1) Readings - Combustible Gas

bull 455 Old Turnpike Road 0-8 bull 477 Old Turnpike Road 0-36 bull 495 Old Turnpike Road 0-34 bull uimumbered sheet metal building south

of 495 0-44

Gas Testing by GZA

At the request of the Town of Southington GZA performed a two phase gas testing program at the Old Turnpike Road Landfill First readings of methane concentration were taken on November 27 and December 3 1985 by GZA personnel using a Scott Model D-15 Model Gas Tester calibrated to methane Readings were taken in the interiors of 455 477 and 495 Old Turnpike Road Southington These readmgs summarized on Table 1 did not indicate detectable quantities of methane in open areas of any building tested However within the RV amp Sons welding shop (455 Old Turnpike Road) air-borne concentrations of methane up to 23 were detected m a floor crack in the southwest comer of the building In addition readings of 12 and 02 methane in air were obtained from a (previously closed) closet and a bathroom area respectively These readings were taken after the buildmg had been empty and locked for approximately 36 hoiu-s The highest detected air concentration of methane (23) is below the lower explosive limit (LEL) of methane in air (LEL = 53) The presence of methane vapors beneath the RV amp Sons welding shop agreed with past DEP findings

As a second phase of methane assessment four borings (B-1 B-2 B-3 B-4) were drilled on March 201986 by East Coast Drilling Inc of Wallingford Connecticut at locations designated by GZA Borings were drilled using hollow-stem augers and a gas monitoring well was installed in each boring Gas monitoring wells consist of a 2-inch polyvinyl chloride (PVC) screen and casing Each well screen was placed from 3 feet below ground to the base of the boring The screens are located such that gases viithin both saturated and unsaturated material can enter the well screen Each gas monitoring well was capped with a PVC push-on cap to limit atmospheric influence in the well and promote a confined environment

Measurements of explosive gases including methane were taken at these gas monitoring wells and in nearby groundwater monitor wells Readings were initially taken by GZA on four occasions in 1986 Results are presented on Table 2 along with the instrumentation used to measure methane

The results presented on Table 2 show that methane was not detected in groimdwater (S- ^ n^onitoring wfllii Invntfid beyond the Ijinits of the landfill Methane was detected at l Cconcentration of 01 in air within gas momtormg well B-1 at concentrations of 5 to 20 in gas monitoring well B-2 and at concentrations of 21 to 32 and 61 to 66 in gas monitoring wells B-3 and B-4 respectively The methane readings within the B-series gas monitoring wells represent the concentration of methane present in the soil pore space under conditions measured at the time of testing

The concentrations of methane detected in the B-series wells are similar or higher ozv than methane concentrations reported by DEP during sampling performed in November 1981 While the method of sampling by DEP was not specified and likely differed from GZAs procedure the results in generaL-indkate--tbat a prevalent condition of gas entrapment methane generation or both is present beneath the gr^Hgimface at least in the_arfia-teste4- lt^^nr jh jjx m wgc rinsed and capped sinceabout 1967 results seemed to indicate that methane was notfireely venting to the atmosphere

Based on the studies conducted and observations made in 1985 to 1986 GZA concluded that measurable concentrations of meplusmnane were present in floor crack in one building on the former landfill and was present within the pore space in soils beneath the land surface ^

It is om understanding that the Town of Southington had advised land owners on the landfill to include venting systems within each building constructed in this area

Based on the findings discussed above GZA recommended that a test system consisting of one recovery trench initially be installed at the landfill area to assess methane recovery methodology via a trench and efficiency and carbon canister breakthrough patterns

A conceptual design for a pilot system was prepared by Environmental Applications Inc (now GZA Remediation) in June of 1987 as presented in Appendix B

J PILOT VENT SYSTEM SUMMARY

Between June of 1987 and June of 1990 land owner permissions to install the trench J and pilot systems were obtained In addition permissionfirom the Connecticut DEP

Solid Waste Management Division was sought and obtained to disturb the landfill siuface and install the system (see Appendix C for related documentation) The need for an air discharge permit related to pilot system operations was also investigated and was determined to be unnecessary by DEPs Air Compliance Unit (see Appendix C)

In JulyAugust 1990 the extraction trench was installed behind 493 Old Turnpike Road Southington a facility now used by the Town Parks and Recreation

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Department The trench location is shown on Figure 1 The system design was substantially the same as that first proposed to the Town in June 1987 by Environmental AppUcations Inc (now QuLK Remediation Inc)

The design consisted of an arc-shaped trench approximately 300 feet in length The trench was excavated with the approval of the Coimecticut Department of Environmental Protection Solid Waste Unit to the top of the refuse layer As shown in Photographs 1 and 2 in Appendix D refuse and debris are evident in the excavated materials

Approximately six inches of gravel was placed in the base of the trench as shown in Photograph 2 Perforated piping and vent risers were then installed as shown in Photographs 3 and 4 Twelve to twenty-four inches of gravel was placed on top of the piping and the surface of the gravel was sealed with 6 mil polyethylene sheeting The sheeting was extended up the sides of the trench and approximately ten feet to either side of the trench to limit short circuiting of air from the ground surface Finally excavated cover soils materials were used to backfill the trench to grade and cover the sheeting on either side

Pilot System Venting Test

The pilot system consisted of the extraction trench approximately 300 feet in length extending across the rear of 493 Old Turnpike Road to the edge of 477 Old Turnpike Road and an extraction system (vacuum blower activated carbon controls etc) located in a small enclosure nearby to draw a vacuum on the center of the trench The trench mcluded ten vertical access ports and three nearby sets of piezometers to measure methane concentrations (as LEL) and vacuum at different depths and at different distances (0 5 10 and 15 feet) fi-om the trench A schematic

system layout is shown on Figure 2 attached

Controls built into the pilot system included gauges to continuously measure combustible gases as a percentage of the lower explosive limit (LEL)^ before and after the system blower and a controller to monitor LEL levels and automatically shut

the system down in the event that LEL levels exceeded a specified limit The unit was calibrated to shut-down extraction at 30 LEL as a conservative safety precaution

1 Measurements of combustible gas are reported as a percentage of the lower explosive limit (LEL) of pentane which is the gas to which the device is calibrated Dividing these readings by a conversion factor of 17 veilos provides approximate concentrations for methane The explosive concentration range of methane in air is between 5 and 15 percent 5 percent represents the LEL and 15 percent represents the upper explosive limit (UEL)

GZV

Prior to start-up of the system measurements were made at the ten access ports for volatile organic compoimds using an 117 eV lamp HNx model photoionization detector (PID) and explosive gases and oxygen using a MSA Model 260 Combustible Gas Meter as percentages in the atmosphere tested Table 4 provides the results of those measurements

During the time between trench installation and system start-up methane accumulated in the trench to the point where the levels of methane extracted exceeded 100 of the lower explosive limit LEL when the system was started up on August 10 1990 Since the system could not operate safely when extracting soil gas from the trench only a bypass valve was opened to mix ambient air into the soil gas for dilution From August 10 to September 4 the extraction trench was flushed until equihbriiun conditions were reached at which time the vacuum blower was extracting air from the trench directiy without ambient air bypass At that time the LEL meters on the system read 3-5 of LEL consistently

The system was monitored frequently during initial start-up and throughout the period of the pilot-test program Field summaries containing system operating parameters during the pilot test are presented in Appendix D

On August 201991 soil vapor samples were obtainedfi-om a system mfluent port and an effluent port located after the carbon treatment system just prior to discharge to ambient air Samples were obtained m two tedlar bags from the ports using a small sampling pump The samples were delivered to Ceimic Corporation of Narragansett Rhode Island for analysis of EPA Method 6248240 compounds An ambient air sample blank prepared by the laboratory accompanied the samples The laboratory report is provided in Appendix E The ambient air sample bljink contained 02 mgm^ of methylene chloride The Air Influent sample reportedly contained 07 mgm^ of acetone the air effluent sample reportedly contained 11 mgm^ of trans-13shydichloropropene and 05 mgm^ of 2-hexanone No other compounds were reportedly detected Detected values are well below (gt 90 less than) short-term (STEL) and long-term (TWA) threshold limit values (TLVs) established as exposure guidelines by ACGIH Glues used in construction of the extraction system may have contributed to detected levels At the reported levels VOC emissions were approximately 00005 poimds per hour well below the allowable discharge limit of 04 lbhour for detected compounds by Connecticut DEP Air Regulations During system operations VOC emissions were monitored periodically with a photoionization detector no PID meter response was noted

At equilibrium the extraction system operated at approximately 75 cubic feet per minute (cfm) with a suction of -28 to -32 inches of water ( H2O) On September 21 a complete set of piezometer readings was taken using a sensitive inclined manometer to measure vacuum with plusmn0005 HjO accuracy The readings indicated that the vacuum in the manifold was maintained at -013 HjO At piezometer points A B

ozv 1

-nl

J ~1 ] ~

]

]

J

]

1 1 1

and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

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C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

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OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

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February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

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(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

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FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

The results presented on Table 2 show that methane was not detected in groimdwater (S- ^ n^onitoring wfllii Invntfid beyond the Ijinits of the landfill Methane was detected at l Cconcentration of 01 in air within gas momtormg well B-1 at concentrations of 5 to 20 in gas monitoring well B-2 and at concentrations of 21 to 32 and 61 to 66 in gas monitoring wells B-3 and B-4 respectively The methane readings within the B-series gas monitoring wells represent the concentration of methane present in the soil pore space under conditions measured at the time of testing

The concentrations of methane detected in the B-series wells are similar or higher ozv than methane concentrations reported by DEP during sampling performed in November 1981 While the method of sampling by DEP was not specified and likely differed from GZAs procedure the results in generaL-indkate--tbat a prevalent condition of gas entrapment methane generation or both is present beneath the gr^Hgimface at least in the_arfia-teste4- lt^^nr jh jjx m wgc rinsed and capped sinceabout 1967 results seemed to indicate that methane was notfireely venting to the atmosphere

Based on the studies conducted and observations made in 1985 to 1986 GZA concluded that measurable concentrations of meplusmnane were present in floor crack in one building on the former landfill and was present within the pore space in soils beneath the land surface ^

It is om understanding that the Town of Southington had advised land owners on the landfill to include venting systems within each building constructed in this area

Based on the findings discussed above GZA recommended that a test system consisting of one recovery trench initially be installed at the landfill area to assess methane recovery methodology via a trench and efficiency and carbon canister breakthrough patterns

A conceptual design for a pilot system was prepared by Environmental Applications Inc (now GZA Remediation) in June of 1987 as presented in Appendix B

J PILOT VENT SYSTEM SUMMARY

Between June of 1987 and June of 1990 land owner permissions to install the trench J and pilot systems were obtained In addition permissionfirom the Connecticut DEP

Solid Waste Management Division was sought and obtained to disturb the landfill siuface and install the system (see Appendix C for related documentation) The need for an air discharge permit related to pilot system operations was also investigated and was determined to be unnecessary by DEPs Air Compliance Unit (see Appendix C)

In JulyAugust 1990 the extraction trench was installed behind 493 Old Turnpike Road Southington a facility now used by the Town Parks and Recreation

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Department The trench location is shown on Figure 1 The system design was substantially the same as that first proposed to the Town in June 1987 by Environmental AppUcations Inc (now QuLK Remediation Inc)

The design consisted of an arc-shaped trench approximately 300 feet in length The trench was excavated with the approval of the Coimecticut Department of Environmental Protection Solid Waste Unit to the top of the refuse layer As shown in Photographs 1 and 2 in Appendix D refuse and debris are evident in the excavated materials

Approximately six inches of gravel was placed in the base of the trench as shown in Photograph 2 Perforated piping and vent risers were then installed as shown in Photographs 3 and 4 Twelve to twenty-four inches of gravel was placed on top of the piping and the surface of the gravel was sealed with 6 mil polyethylene sheeting The sheeting was extended up the sides of the trench and approximately ten feet to either side of the trench to limit short circuiting of air from the ground surface Finally excavated cover soils materials were used to backfill the trench to grade and cover the sheeting on either side

Pilot System Venting Test

The pilot system consisted of the extraction trench approximately 300 feet in length extending across the rear of 493 Old Turnpike Road to the edge of 477 Old Turnpike Road and an extraction system (vacuum blower activated carbon controls etc) located in a small enclosure nearby to draw a vacuum on the center of the trench The trench mcluded ten vertical access ports and three nearby sets of piezometers to measure methane concentrations (as LEL) and vacuum at different depths and at different distances (0 5 10 and 15 feet) fi-om the trench A schematic

system layout is shown on Figure 2 attached

Controls built into the pilot system included gauges to continuously measure combustible gases as a percentage of the lower explosive limit (LEL)^ before and after the system blower and a controller to monitor LEL levels and automatically shut

the system down in the event that LEL levels exceeded a specified limit The unit was calibrated to shut-down extraction at 30 LEL as a conservative safety precaution

1 Measurements of combustible gas are reported as a percentage of the lower explosive limit (LEL) of pentane which is the gas to which the device is calibrated Dividing these readings by a conversion factor of 17 veilos provides approximate concentrations for methane The explosive concentration range of methane in air is between 5 and 15 percent 5 percent represents the LEL and 15 percent represents the upper explosive limit (UEL)

GZV

Prior to start-up of the system measurements were made at the ten access ports for volatile organic compoimds using an 117 eV lamp HNx model photoionization detector (PID) and explosive gases and oxygen using a MSA Model 260 Combustible Gas Meter as percentages in the atmosphere tested Table 4 provides the results of those measurements

During the time between trench installation and system start-up methane accumulated in the trench to the point where the levels of methane extracted exceeded 100 of the lower explosive limit LEL when the system was started up on August 10 1990 Since the system could not operate safely when extracting soil gas from the trench only a bypass valve was opened to mix ambient air into the soil gas for dilution From August 10 to September 4 the extraction trench was flushed until equihbriiun conditions were reached at which time the vacuum blower was extracting air from the trench directiy without ambient air bypass At that time the LEL meters on the system read 3-5 of LEL consistently

The system was monitored frequently during initial start-up and throughout the period of the pilot-test program Field summaries containing system operating parameters during the pilot test are presented in Appendix D

On August 201991 soil vapor samples were obtainedfi-om a system mfluent port and an effluent port located after the carbon treatment system just prior to discharge to ambient air Samples were obtained m two tedlar bags from the ports using a small sampling pump The samples were delivered to Ceimic Corporation of Narragansett Rhode Island for analysis of EPA Method 6248240 compounds An ambient air sample blank prepared by the laboratory accompanied the samples The laboratory report is provided in Appendix E The ambient air sample bljink contained 02 mgm^ of methylene chloride The Air Influent sample reportedly contained 07 mgm^ of acetone the air effluent sample reportedly contained 11 mgm^ of trans-13shydichloropropene and 05 mgm^ of 2-hexanone No other compounds were reportedly detected Detected values are well below (gt 90 less than) short-term (STEL) and long-term (TWA) threshold limit values (TLVs) established as exposure guidelines by ACGIH Glues used in construction of the extraction system may have contributed to detected levels At the reported levels VOC emissions were approximately 00005 poimds per hour well below the allowable discharge limit of 04 lbhour for detected compounds by Connecticut DEP Air Regulations During system operations VOC emissions were monitored periodically with a photoionization detector no PID meter response was noted

At equilibrium the extraction system operated at approximately 75 cubic feet per minute (cfm) with a suction of -28 to -32 inches of water ( H2O) On September 21 a complete set of piezometer readings was taken using a sensitive inclined manometer to measure vacuum with plusmn0005 HjO accuracy The readings indicated that the vacuum in the manifold was maintained at -013 HjO At piezometer points A B

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and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

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METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

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bull ^

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bull^ ppoundRFOtVgt0rED t)RAJJ PlpE

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bull bo eui_

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REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

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li bull I MS 11gt 1gt 1 W 1

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

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C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

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OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

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Department The trench location is shown on Figure 1 The system design was substantially the same as that first proposed to the Town in June 1987 by Environmental AppUcations Inc (now QuLK Remediation Inc)

The design consisted of an arc-shaped trench approximately 300 feet in length The trench was excavated with the approval of the Coimecticut Department of Environmental Protection Solid Waste Unit to the top of the refuse layer As shown in Photographs 1 and 2 in Appendix D refuse and debris are evident in the excavated materials

Approximately six inches of gravel was placed in the base of the trench as shown in Photograph 2 Perforated piping and vent risers were then installed as shown in Photographs 3 and 4 Twelve to twenty-four inches of gravel was placed on top of the piping and the surface of the gravel was sealed with 6 mil polyethylene sheeting The sheeting was extended up the sides of the trench and approximately ten feet to either side of the trench to limit short circuiting of air from the ground surface Finally excavated cover soils materials were used to backfill the trench to grade and cover the sheeting on either side

Pilot System Venting Test

The pilot system consisted of the extraction trench approximately 300 feet in length extending across the rear of 493 Old Turnpike Road to the edge of 477 Old Turnpike Road and an extraction system (vacuum blower activated carbon controls etc) located in a small enclosure nearby to draw a vacuum on the center of the trench The trench mcluded ten vertical access ports and three nearby sets of piezometers to measure methane concentrations (as LEL) and vacuum at different depths and at different distances (0 5 10 and 15 feet) fi-om the trench A schematic

system layout is shown on Figure 2 attached

Controls built into the pilot system included gauges to continuously measure combustible gases as a percentage of the lower explosive limit (LEL)^ before and after the system blower and a controller to monitor LEL levels and automatically shut

the system down in the event that LEL levels exceeded a specified limit The unit was calibrated to shut-down extraction at 30 LEL as a conservative safety precaution

1 Measurements of combustible gas are reported as a percentage of the lower explosive limit (LEL) of pentane which is the gas to which the device is calibrated Dividing these readings by a conversion factor of 17 veilos provides approximate concentrations for methane The explosive concentration range of methane in air is between 5 and 15 percent 5 percent represents the LEL and 15 percent represents the upper explosive limit (UEL)

GZV

Prior to start-up of the system measurements were made at the ten access ports for volatile organic compoimds using an 117 eV lamp HNx model photoionization detector (PID) and explosive gases and oxygen using a MSA Model 260 Combustible Gas Meter as percentages in the atmosphere tested Table 4 provides the results of those measurements

During the time between trench installation and system start-up methane accumulated in the trench to the point where the levels of methane extracted exceeded 100 of the lower explosive limit LEL when the system was started up on August 10 1990 Since the system could not operate safely when extracting soil gas from the trench only a bypass valve was opened to mix ambient air into the soil gas for dilution From August 10 to September 4 the extraction trench was flushed until equihbriiun conditions were reached at which time the vacuum blower was extracting air from the trench directiy without ambient air bypass At that time the LEL meters on the system read 3-5 of LEL consistently

The system was monitored frequently during initial start-up and throughout the period of the pilot-test program Field summaries containing system operating parameters during the pilot test are presented in Appendix D

On August 201991 soil vapor samples were obtainedfi-om a system mfluent port and an effluent port located after the carbon treatment system just prior to discharge to ambient air Samples were obtained m two tedlar bags from the ports using a small sampling pump The samples were delivered to Ceimic Corporation of Narragansett Rhode Island for analysis of EPA Method 6248240 compounds An ambient air sample blank prepared by the laboratory accompanied the samples The laboratory report is provided in Appendix E The ambient air sample bljink contained 02 mgm^ of methylene chloride The Air Influent sample reportedly contained 07 mgm^ of acetone the air effluent sample reportedly contained 11 mgm^ of trans-13shydichloropropene and 05 mgm^ of 2-hexanone No other compounds were reportedly detected Detected values are well below (gt 90 less than) short-term (STEL) and long-term (TWA) threshold limit values (TLVs) established as exposure guidelines by ACGIH Glues used in construction of the extraction system may have contributed to detected levels At the reported levels VOC emissions were approximately 00005 poimds per hour well below the allowable discharge limit of 04 lbhour for detected compounds by Connecticut DEP Air Regulations During system operations VOC emissions were monitored periodically with a photoionization detector no PID meter response was noted

At equilibrium the extraction system operated at approximately 75 cubic feet per minute (cfm) with a suction of -28 to -32 inches of water ( H2O) On September 21 a complete set of piezometer readings was taken using a sensitive inclined manometer to measure vacuum with plusmn0005 HjO accuracy The readings indicated that the vacuum in the manifold was maintained at -013 HjO At piezometer points A B

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and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

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For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

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(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

5PAiLlKjq PET ikl f M t REIXgt

K suacK^rltltgt ^^ - V pono

LOCATIOKJ ^ -^7shy

1 CiB7 -gtvtm5-M LOc v - noK j ( ^ A P P t o y )ENVIRONMENTAL APPLICATIONS INC OCT

METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

^OUTHfM6T0M CT 1 DATEsi-- 2 0 - 8 SCALE bullbull NOM pound 1 JOB No f l - |0faI ]

F0T08EAM BROOKSIOE

J Lbdquo r I I

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JI-mdash-VACUUM 5EW^iMdj LJMpound

T^shy t=rshy

bull ^

f I f y

4

^ ^ ClA -5laquoH-^O r V d -

TO TReATKE)OT

ir =

z J t

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bull ^ c gtgt

^ - 6 TYP

bull- ^ i

bull^ ppoundRFOtVgt0rED t)RAJJ PlpE

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bull bo eui_

Z^iI312

T Y P

I V shy - ^

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VACUUM THE-UCH TDt-TAlL-p

1 lts7 - ) C F K A ^ O O M T K E A J C H mdash D t T A l v j ENVIRONMENTAL APPLICATIONS INC

bull

REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

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((DO

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li bull I MS 11gt 1gt 1 W 1

1 1 ^ 1 1 I1$ bull

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4 z t J

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J

APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

GZV

Prior to start-up of the system measurements were made at the ten access ports for volatile organic compoimds using an 117 eV lamp HNx model photoionization detector (PID) and explosive gases and oxygen using a MSA Model 260 Combustible Gas Meter as percentages in the atmosphere tested Table 4 provides the results of those measurements

During the time between trench installation and system start-up methane accumulated in the trench to the point where the levels of methane extracted exceeded 100 of the lower explosive limit LEL when the system was started up on August 10 1990 Since the system could not operate safely when extracting soil gas from the trench only a bypass valve was opened to mix ambient air into the soil gas for dilution From August 10 to September 4 the extraction trench was flushed until equihbriiun conditions were reached at which time the vacuum blower was extracting air from the trench directiy without ambient air bypass At that time the LEL meters on the system read 3-5 of LEL consistently

The system was monitored frequently during initial start-up and throughout the period of the pilot-test program Field summaries containing system operating parameters during the pilot test are presented in Appendix D

On August 201991 soil vapor samples were obtainedfi-om a system mfluent port and an effluent port located after the carbon treatment system just prior to discharge to ambient air Samples were obtained m two tedlar bags from the ports using a small sampling pump The samples were delivered to Ceimic Corporation of Narragansett Rhode Island for analysis of EPA Method 6248240 compounds An ambient air sample blank prepared by the laboratory accompanied the samples The laboratory report is provided in Appendix E The ambient air sample bljink contained 02 mgm^ of methylene chloride The Air Influent sample reportedly contained 07 mgm^ of acetone the air effluent sample reportedly contained 11 mgm^ of trans-13shydichloropropene and 05 mgm^ of 2-hexanone No other compounds were reportedly detected Detected values are well below (gt 90 less than) short-term (STEL) and long-term (TWA) threshold limit values (TLVs) established as exposure guidelines by ACGIH Glues used in construction of the extraction system may have contributed to detected levels At the reported levels VOC emissions were approximately 00005 poimds per hour well below the allowable discharge limit of 04 lbhour for detected compounds by Connecticut DEP Air Regulations During system operations VOC emissions were monitored periodically with a photoionization detector no PID meter response was noted

At equilibrium the extraction system operated at approximately 75 cubic feet per minute (cfm) with a suction of -28 to -32 inches of water ( H2O) On September 21 a complete set of piezometer readings was taken using a sensitive inclined manometer to measure vacuum with plusmn0005 HjO accuracy The readings indicated that the vacuum in the manifold was maintained at -013 HjO At piezometer points A B

ozv 1

-nl

J ~1 ] ~

]

]

J

]

1 1 1

and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

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Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

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C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

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OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

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February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

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(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

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FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

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and C located at five ten and fifteen feet from the trench respectively there was decreasing vacuum with increasing distance from the extraction piping as expected However the values were relatively low typically -002 to -02 HjO These data are presented in Table 5 This level of vacuum provided a hmited driving force for vapor flow so a larger vacuum blower was installed

A second set of piezometer readings was taken on December 51990 using the larger vacuimi blower This unit generated almost double the suction (-5 HjO) and more than three times the previousflow rate (260 cfm) Therefore the vacuum in the trench and piezometers increased about fivefold to approximately -01 to -10 H2O These data are presented in Table 6

CONCLUSIONS

The data developed during the pilot testing (extraction at 2 to 5 HjO) indicates that relatively low vacuum extraction systems should be sufficient for venting the on-site soils above the landfill This is fortuitous in that systems capable of higher vacuums typically have significantly increased capital and operating costs The pilot test also demonstrated that low vacuum systems are sufficient to establish a zone of influence (vacuum greater than -01 HjO) extending at least to 15 feet from the extraction point This zone of influence was achieved during pilot testing with only a partial cap extending 12 feet out from the extraction trench As such it appears that extractioninlet point spacing can be increased beyond 15 feet in areas with a low permeability cover such as existing building floors Therefore developing extractioninlet point spacings which are practical given the geometry of the existing structures appears feasible

lt gt The pilot test results indicate that the surface soils above the landfill are relatively porous This would suggest that methane gas generated by the landfill debris should migrate relatively freely through the fill to the surface As such much of the methane generated in the past has already been removed via natural passive venting

REMEDIAL ACTION PLAN

Methane when present in sufficient quantities can typically enter a building through cracks in floor slabs and building foundations Typical pathways for methane migration are shown on Figure 3

There are basically three means of preventing methane gas from seeping into buildings through foundations

1

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1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

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For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

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Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

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means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

5PAiLlKjq PET ikl f M t REIXgt

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METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

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bull ^

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bull ^ c gtgt

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bull^ ppoundRFOtVgt0rED t)RAJJ PlpE

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bull bo eui_

Z^iI312

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bull

REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

GZ

1 Sealing ie provide an unpermeable barrier

2 FaciUtating venting ie passive methane gas flow from under the foimdation using piping and naturally occurring pressure gradients and

3 Active venting ie usmg mechanical means such as a vacuum blower to increase sub-slab ventilation carrying methane gas away from the foundation diluted in an airstream

Gas generation rates in available published literature for municipal landfills vary widely between 006 and 150 cubic feet per day per square foot of landfill area GZA understands that this area of the landfill has been inactive for almost twenty-five years This suggests that the generation rate is probably at the lower end of the range Typical landfill gas data also indicates that landfill gas is approximately half methane and half carbon dioxide with minor constituents of other gases

The first step in selecting an appropriate remedial action alternative is to determine which structures if any are affected by methane in interior atmospheres at unacceptable levels The structures then need to be examined to determine slab conditions and other constraints such as interior layout which may make certain alternatives unpractical In addition the type of structure residential or commercial and its use may also affect the choice of an appropriate remedial alternative Most importantiy remedial action should not be initiated before a clear definition of the problem exists

In solving problems caused by methane gas seepage generally one would try sealing first and resort to passive and subsequently active venting only if required to do so All three systems may include the sealing of the foundation slab as an integral part of their design although active systems are often installed without sealing These solutions also become progressively more costly and regulatorily burdensome and thus it is desirable to adopt the simplest solution that will solve the problem The three alternatives are discussed below in more detail

I ALTERNATIVES

A Sealing

A first step in stopping the seepage of methane gas into the enclosed space(s) of structures is to provide as tight a gas barrier as possible in the lowest level of the structure in contact with the soils methane is rising up from The typical procedure is to identify all cracks joints etc and patch them to render the floor or slab relatively impermeable Cracks in concrete slabs are typically saw cut and filled with non-shrinking grout other joints can be grouted or caulked as appropriate

8

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

ozv

For example a flexible caulk or seal must be used for structural expansion joints which must be free to move If the floor or slab is permeable or severely cracked then applying a new surface coat of cement or polymeric sealant may be called for

Open joints or cracks where slabs abut walls should be sealed with an elastomeric joint sealer resistant to gas flow Preparation of surfaces to which the sealer is intended to adhere is critical as a minimum measure surfaces should be free from dirt oil and grease Cracks should first be sawcut to provide uniform clean surfaces

Methane gas which finds its way under the foundation will thus build up until the excess moves away from the foundation along sidewaUs or through surface soils If the methane gas seepage rate is low seaUng is probably adequate since the redirected methane flow will be very dispersed and not hkely to be mtroduced into the building A typical mstallation is shown m Figure 4

B Passive Venting

If slab sezding cannot be performed reliably or economically the next step is to provide a path to redirect accumulated methane away from the structure Passive venting accomplishes this by utilizing the natural concentration and pressure gradients resultingfi-om the relative densities of methane and air

A passive venting system could be unplemented by saw cutting the slab and installing perforated piping in a crushed stone bedding below it or by driving well points through the frost walls Thus a pathway for methane collecting under the slab is created This piping is then connected to a vent stack nearby that exhausts the methane above the roof line of the structure Since methane is less dense than air of the same temperature it tends to rise away from the structure However groimd temperature is usually lower than ambient air temperature in the simimer decreasing dispersion of methane

Passive venting can often be employed to solve the problem of methane re-entering the building by rising along the foundation walls and being drawn in through vents or window However if methane concentrations are high enough it will be difficult to redirect all the methane flow passively and prevent undesirable concentrations of methane appearing in unwanted areas As with slab seaUng concentrations of methane will still build up under the slab A typical mstallation is shown in Figure 5

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

5PAiLlKjq PET ikl f M t REIXgt

K suacK^rltltgt ^^ - V pono

LOCATIOKJ ^ -^7shy

1 CiB7 -gtvtm5-M LOc v - noK j ( ^ A P P t o y )ENVIRONMENTAL APPLICATIONS INC OCT

METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

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bull ^

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bull ^ c gtgt

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bull^ ppoundRFOtVgt0rED t)RAJJ PlpE

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bull bo eui_

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bull

REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

oz

Active Venting

Active venting is generally employed where methane gas accumulates in tmdesirable concentrations due to high rates of methane gas flow up through the soil Site specific factors such as obstructions located beneath the foundation may prevent passive venting from providing sufficient methane withdrawal Likewise a badly cracked slab or one which continues to settle and crack (common in slabs placed on landfills) is not likely to remain sealed and sealing alone will not reliably prevent methane intrusion into the building

The advantages of a well designed active venting system are that it prevents the accumulation of high concentrations of methane by ventilating the soils under the building and that it provides for better dispersion and dilution of the vented gasair mixture

Additional engineering efforts might include estimating the generation and flow rates of methane although the induced air flow is usually sufficient to overcome the slower methane generation rate

For residences which typically have a smaller footprint ie fotmdations are of lesser area typical designs involve installing air inlet points on one side of the foundation and air outiets on the other side By pulling a vacuum on the air outlets air is drawn in the inlet points sweeps through the soils beneath the foundation and is collected at the outiets and exhausted through the vacuum blower to a suitable stack typically above the structures roof line

In New England slab-on-grade buildings are constructed with frost walls andor grade beams below the slab A typical installation would require shallow excavation (two to four feet below grade) along the frost wall to lay an air mlet manifold pipe At intervals along the manifold holes are drilled through the frost wall and perforated pipes or well points are driven into the soils beneath the foundation slab The openings on the suction (vacuum) side of the frost wall are then sealed tightly to prevent short circuiting of the airflow Depending on the frost wall construction the entire surface might be sealed with a suitable polymeric or tar coating

This process is repeated on the other side of the foundation for the air outlet manifold This manifold is connected to a vacuum blower of sufficient capacity to induce the necessary air flow As with any venting system it is usually desurable to have some means of monitoring air in the soils below the foundation using piezometers to provide both a

10

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

5PAiLlKjq PET ikl f M t REIXgt

K suacK^rltltgt ^^ - V pono

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METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

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bull ^

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4

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1 lts7 - ) C F K A ^ O O M T K E A J C H mdash D t T A l v j ENVIRONMENTAL APPLICATIONS INC

bull

REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

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((DO

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1 1 ^ 1 1 I1$ bull

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- ^ T amp ^ ^ f ^ THRU ^ M P vwx

s_ l

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J

APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

oz

means of sampling of the air to check methane content and a means of measuring the induced vacuum and thus the amount of air flow imder the foundation in that location The soils beneath fotmdations are not usually homogeneous and various obstructions to air flow are usually present so it is important to eliminate dead spots under the foundation A typical installation is shown in Figure 6

The situation for commercial buildings differs primarily because of the larger area of the foimdation Slabs wider than twenty to forty feet depending on soil porosity are usually too wide to vent from the edges alone This is dependent on the sub-slab construction such as depth and type of crushed stone base for example Another significant factor is the presence of sub-slab structures such as grade beams which can channel or block air flow For these reasons it is very important to understand the sub-slab configuration Costs for blowers capable of producing greater vacuums rise quickly and a more practical solution is to add additional inlet andor extraction points under the foimdation

A typical installation for a commercial building might involve saw cutting a trench down the center of the foundation slab and installing perforated air inlet piping in a suitable bed of crushed stone just beneath the slab The slab is then repaired and sealed and extraction manifolds are installed along opposite sides or even the perimeter of the building Fresh air is thereby drawn in underneath the center of the slab and withdrawn along with methane gas at the periphery For even wider slabs additional extraction and air inlet manifolds might need to be installed under the slab Typical installations are shown in Figure 7

n RECOMMENDATIONS

GZA recommends a program of periodic monitoring for structures thought to be potentially impacted by seepage of methane gas from the Old Southington Landfill to determine what if any problems exist in which structures and to what extent Such a program should be conducted throughout at least one calendar year so that seasonal effects such as frosts can be accounted for

At the conclusion of such a study G21A could then recommend the appropriate remedial alternatives for impacted structures based on information collected specific to each structure Until the conclusions of such a monitoring program are detennined GZA cannot recommend an appropriate remedial alternative if any

J

1 11

1

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

We trust this information meets your current needs Should you have any questions or comments please feel free to call

Very truly yours

GZA GEOENVIRONMENTAL INC

OZV w E Hacfanan PE Matthew Barvenik cal SpeciaUst ConsultantReviewer

Kathleen A Cyr Associate-m-Charge

MEHKACad

12

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

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(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

5PAiLlKjq PET ikl f M t REIXgt

K suacK^rltltgt ^^ - V pono

LOCATIOKJ ^ -^7shy

1 CiB7 -gtvtm5-M LOc v - noK j ( ^ A P P t o y )ENVIRONMENTAL APPLICATIONS INC OCT

METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

^OUTHfM6T0M CT 1 DATEsi-- 2 0 - 8 SCALE bullbull NOM pound 1 JOB No f l - |0faI ]

F0T08EAM BROOKSIOE

J Lbdquo r I I

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JI-mdash-VACUUM 5EW^iMdj LJMpound

T^shy t=rshy

bull ^

f I f y

4

^ ^ ClA -5laquoH-^O r V d -

TO TReATKE)OT

ir =

z J t

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bull ^ c gtgt

^ - 6 TYP

bull- ^ i

bull^ ppoundRFOtVgt0rED t)RAJJ PlpE

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bull bo eui_

Z^iI312

T Y P

I V shy - ^

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VACUUM THE-UCH TDt-TAlL-p

1 lts7 - ) C F K A ^ O O M T K E A J C H mdash D t T A l v j ENVIRONMENTAL APPLICATIONS INC

bull

REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

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((DO

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li bull I MS 11gt 1gt 1 W 1

1 1 ^ 1 1 I1$ bull

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4 z t J

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J

APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 1

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

IN-BUHJDING METHANE TESTING

J | r o - - -gt S t^^J^^bullbullgtgtgtgtbullbullgtbullobullbullbullbullbullbullbulloo^bullbullbullbull^bullbull^bullbullo^iliiiiiiiM^^^ 1 112785 RV amp Sons Weldmg bull open area

bull In closet off office bull Floor crack

(southwest comer) bull Floor crack

(north side)

II 112785 Catch Basm bull Between buildings No 447 and RV amp Sons Welding

1 112785 447 Old Turnpike bull Open areas I Road bull Open closetJ bull Floor crack-near office

bull Floor crack-south end

1 112785 Sabco Building bull Open area-shop bull Open area-office

J ^ ^ _j K)set aiea 1 12385 RV amp Sons eldini)^ bull Center of Building

(455 Old Tumlgtike^ bull Floor crack J Road) (southwest comer)

bull Southwest comer of building

bull Closet off office bull Bathroom bull Floor crack bull Lumber room

Notes ND = None Detected

i^lvfeHANE - ^INAIR^V-shy

ND 1 01 ND

ND

ND

ND ND ND ND

ND 1 ND

ND

3 01 1 (a) 15 (b) 13 (c) 23

00

12 02 00 00 1

(1) Methane readings were obtained using a Scott Model D-15 Gas Tester calibrated to methane Readings represent the percent of methane present in the sampled atmosphere

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

FACriVil METHANE ^2 VEWT s y s T E n

reg VAC V )ONA t - E MtOR7

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 2 OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

RESULTS OF GAS TESTING IN MONITORING WELLS

^^ f f i lH^^IHIi i l i l 32086 4186 41486 2286 ^

(2) (2) (2) (2) (3A) (3B)

bull Gas Monitoring Well

B-1 mdash 01 01 ND 19 ND

B-2 mdash 50 70 20 13 gt100 (al

B-3 mdash 22 21 32 3 gt100

B-4 mdash 64 66 61 3 gt100

bull Groimdwater Monitormg Well (1)

CW-20 ND ND 05 ND 20 ND

LW-103S ND ND ND ND ND ND

CW-15 01 ND ND mdash -- ~

LW-15S ND ND ND ND 205 ND

TW-17S ND ND ND ND 21 ND

LW-102S ND ND ND ND 205 ND

TW-18 mdash ND ND ND 12 ND

TW-19 ND ND ND 23 ND

I LW-IOIS Destroyed

Notes 1 Wells LW-103S LW-102S and TW-19 had portions of tiie screened section of the well above

the water table at the time of gas testing

2 Readings were taken using a Scott Model D-15 gas tester calibrated to methane Readings represent percent of methane in air

3 Readings were taken using an MSA Combustible Gas Indicator Model 260 calibrated to a pentane standard

3A Note that air typically has a 21 oxygen content 3B Assuming all combustible gas is represented as methane readmgs of gt 100 of LEL

(lower Explosive Limit) are equivalent to gt62 LEL for methane based on manufacturers response curves for methane and pentane

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 1 of 2

APPROXIMATTE

liiilililiiiliiii 02

29

28

08

08

04

29

29

02

74

63

80

63

45

55

74

Ll

02

76

46

21

01

0

illiiililiillliiiil

TB-15

TB-49

TB-55

TB-510

TB-515

TB-520

TB-65

TB-610

TB-75

TB-715

TB-718 A

TB-720

TB-722

TB-729

TB-730

TB-735 ^

GZ-7M20

GZ-7M3040

GZ-7D30 (Time 1009)

(Time 1028)

(Time 1110)

(Time 1144)

(Time 1350)

209

15

201

164

148

155

195

15

217

179

189

149

203

197

203

201

208

207

182

218

217

217

225

iiiiipilEliiii liiiiiiliiiii

100

94

264

273

14

100

100

245

211

267

211

149

183

249

36

252

152

71

0

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 3

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

1990 TEST BORING METHANE TESTING

Page 2 of 2

mmmmmmmmmm liiiWliiMiillilliiii [APPROXIMATE mmmmmmMmm lllllllllll^ | | R l | | i | | l | | | i

iiiiiiiiiiiiiiiiil

J

1 IliiiiiiiiiH^^^^ TB-85 205 7 02

TB-88 192 gt100 gt29

TB-810 209 12 04

TB-105 19 6 02

TB-1012 156 170 51

GZ-12M 208 1 01

TB-13 197 1 01

TB-245 15 100 29

TB-235 209 3 02

TB-26 - 3 02

TB-25^ 207 273 82 -

Notes

LEL and O2 measured using an MSA Model 360 Carbon Monoxide Combustible Gas and Oj Alarm cjdibrated to pentane If all detected combustible gas was methane LEL as methane can be approximated by dividing LEL-meter by 17

2 Approximate Methane in air obtained by ( LEL Reading - 17) times 005 since 5 methane in air is approximately 100 LEL

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 4

OLD TURNPIKE ROAD LANDFILL SOUTHINGTON CONNECTICUT

PILOT SYSTEM FIELD TESTING

^ ^ ^ ^ ^ m ^ B ^ ^ ^ ^ ^ s ^ ^ n ^ ^ ^ ^ ^ lllliiiiiiilllill

wmmmMmmmi iiililHliilBii iiiliiijli^ Port 1 42 gt100 0

Port 2 21 gt100 lt7

Port 3 03 17 16

Port 4 ND lt5 18

Port 5 ND lt1 18

Port 6 ND lt1 155

Port 7 ND 5 18

Port 8 ND lt2 15

Port 9 ND 23 12

Port 10 ND 60 16

^ ^ ^ ^ ^ ^ ^ ^ g ^ ^ ^ m m ^ ^ ^ ^ ^ ^ M Pump Inflow ND 36 12

Pump Outflow ND 30 ^

Notes

1 PID Readmgs obtauied with an 117 eV HNM Model Photoionization Detector 2 LEL and Oj obtained usmg an MSA Model 260 Combustible Gas and Oj

Alarm cahbrated to methane

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

f

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 1 of 2

iBSSisWig^^

iPlNiiiiiiBi^i liillillilBill

2

2

2

2

2

2

2

2

2

5

5

5

5

5

5

5

^ 5

5

9

9

9

bulliiiiiliB liiBiiiiiiiiiil

O

A

A

A

B

B

B

C

C

O

A

A

A

B

B

B

C

C

C

O

A

A

iiraquoiiaMIHliiilaquo iiPiiiiiiiiiiiiiiii

S

M

D

S

M

D

S

D

-

S

M

D

S

M

D

S

M

D

0

S

M

[bullIIHIillll

-0095

-004

-0035

-002

-002

-

-

-

-013

-011

-014

-005

-008

-004

-006

-0045

-005

-

-013

-0065

-006

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

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S

M

D

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M

D

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-001

-002

-003

-002

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TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

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o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 5

PIEZOMETER READINGS (92190) AT 743 CFM AND 28 INCHES OF WATER VACUUM

(REFER TO FIGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 2 of 2

lliill^iiiigjariiilli

9 A

9 B

9 B

B1 ^ 9 C

9 C

9 C

Notes

S - Shallow M - Medium D - Deep

lliiiiiiiiiifiiiip^^^^^^ D

S

M

D

S

M

D

lll|i|||iiip|llj^^^^^

-003

-001

-002

-003

-002

-003

-001

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS)

II 1 VENT NUMBERllilliiilil

1 6

8

9

9

9

9

9

9

9

9

9

9

1

2

2

3

4

5

5

6

7

LOCATIONliiiiilll

o 0

o o A

A

A

B

B

B

C

C

C

o O

B

O

O

O

B

O

O

Page 2 of 3

bullliiwiibulliiiiiii

-

-

-

-

S

M

D

S

M

D

S

M

D

bull

-

S

-

-

S

-

iiWMEiii iiiiiiiiiii

1114

1131

1137

i i i i lPl i i ipi i (mches of water) |

-06

-045

-04

-04

-01

-02

-01

-01

-01

-01

-01

-01 laquolaquolaquolaquo

-04

-04

-015

-04

-04

-07

-04

-06

-04

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE 6

PIEZOMETER READINGS (121590) AT 260 CFM AND 5 INCHES OF WATER VACUUM

(REFER TO HGURE 1 FOR VENT NUMBERS AND LOCATIONS) Page 3 of 3

VENT NUMBER LOCATION DEPTH^ TIME lliililli iliiiiiiiilii iiiiiiiii [inches of water)

8 O -04

O 1142 -04

B -01

NOTE

bull = A positive reading was observed indicating that the piezometer may be plugged S - Shallow M - Medium D - Deep

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

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February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

L_J L _ i L___l L__fc L_ B i I i I I I I I I I I I rv n n n n n n I PROJECT 4 -1 -7025 FIGURE 2

Town of Soulhington Melhnne ExliQcUon System

N UYOUT

LEOEND (D Venl looallon (3) Piezometer

location Fence

Piping ExlracUon

477

(NOT TO SCALE)

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

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February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

1

I

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

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OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

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February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

UMITATIONS

1 The observations described in this report were made under the conditions stated therein The conclusions presented in the report were based solely upon the services described therein and not on scientific tasks or procedures beyond the scope of described services or the time and budgetary constraints imposed by Client The work described in this report was carried out in accordance with the attached Statement of Terms and Conditions

2 In preparing this report GZA GeoEnvironmental Inc has relied on certain information provided by state and local officials and other parties referenced therein and on information contained in the files of state andor local agencies available to G21A GeoEnvironmental at the time of the site assessment Although there may have been some degree of overlap in the information provided by these various sources GZA GeoEnvironmental did not attempt to independently verify the accuracy or completeness of all information reviewed or received during the course of this site assessment

3 In the event that bank counsel or title examiner for Client obtains information on environmental or hazardous waste issues at the site not contained in this report such information shall be brought to G2A GeoEnvironmentals attention forthwith G2A GeoEnvironmental will evaluate such information and on the basis of this evaluation may modify the conclusions stated in this report

4 Observations were made of the site and of structures on the site as indicated within the report Where access to portions of the site or to structures on the site was unavailable or limited GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil in that portion of the site or structure In ad(Ution GZA GeoEnvironmental renders no opinion as to the presence of hazardous material or oil or to the presence of indirect evidence relating to hazardous material or oil where direct observation of the interior walls Qoor or ceiling of a structure on a site was obstructed by objects or coverings on or over these surfaces

5 Unless otherwise specified in the report GZA GeoEnvironmental did not perform testing or analyses to determine the presence or concentration of asbestos or polychlorinated biphenyls (PCBs) at the site or in the environment at the site

6 The purpose of this report was to assess the physical characteristics of the subject site mth respect to the presence in the environment of hazardous material or oil as defined in Connecticut General Statutes Section 22a-452 No specific attempt was made to check on the compliance of present or past owners or operators of the site yith federal state or local laws and regulations environmental or otherwise

7 The conclusions and recommendations contained in this report are based in part upon the data obtainedfiom a limited number of soil andor groundwater samples obtained from widely spaced subsurface explorations The nature and extent of variations between these explorations may not become evident until further exploration If variations or other latent conditions then appear evident it will be necessary to reevaluate the conclusions and recommendations of this report

8 Water level readings have been made in the test pits borings andor observation wells at the times and under the conditions stated on the test pit or boring logs However it must be noted that fluctuations in the level of groundwater may occur due to variations in rainfall and other factors different from those prevailing at the time measurements were made

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

9 Except as noted within the text of the report no quantitative laboratory testing was performed as part of the site assessment Where such analyses have been conducted by an outside laboratory GZA GeoEnvironmental has relied upon the data provided and has not conducted an independent evaluation of the reliability of these data

10 The conclusions and recommendations contained in this report are based in part upon various types of chemical data and are contingent upon their validity These data have been reviewed and interpretations made in the report As indicated within the report some of these data are prelLminaiy screening level data and should be confirmed with quantitative analyses if more specific information is necessary Moreover it should be noted that variations in the types and concentrations of contaminants and variations in their flow paths may occur due to seasonal water table fluctuations past disposal practices the passage of time and other factors Should additional chemical data become available in the future these data should be re^iewed by GZA GeoEnvironmental and the conclusions and reconunendations presented herein modified accordingly

11 Chemical analyses have been performed for specific parameters during the course of this site assessment as described in the text However it should be noted that additional chemical constituents not searched for during the current study may be present in soil andor groundwater at the site

12 It is recommended that G21A GeoEnvironmental be retained to provide further engineering services during construction andor implementation of any remedial measures recommended in this report This is to allow G2iA GeoEnvironmental to observe compliance with the concepts and recommendations contained herein and to allow tbe development of design changes in flie event that subsurface conditions differ fi-om those anticipated

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

APPENDK B

PILOT METHANE EXTRACTION SYSTEM CONCEPTUAL DESIGN

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

I=A ENVIRONMENTAL APPLICATIONS INC

June 15 1987 EA Project No R-1061

Goldberg-Zoinc amp Associates Inc 955 Connecticut Avenue Bridgeport Connecticut 06604

Attention Ms Kathy Cyr

Re Methane Extraction Pilot System Southington Landfill

Dear Ms Cyr

Enclosed are three copies of the Methane Extraction Pilot System Construction Specifications Please review them and contact us at your convenience so that we can answer any questions you may have

V e r y t r u l y y o u r s

ENVXRQJIIIENTAL APPLg IONS INC

C F Project Manager

Carl L Eidam President

JCFCLE11

Tank ManagementEnvironmental Remediation ServicesConstruction Management 335 Bear Hill Road Waltham MA 02154 617-890-3922

An Equal Opportunity Employer MFAH

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

TABLE OF CONTENTS

Page

100 PURPOSE 1

200 PILOT TEST OBJECTIVES 1

300 VACUUM EXTRACTION SYSTEM DESCRIPTION 2

400 PILOT TEST PROCEDURES 2

410 MONITORING 2

420 DESIGN PARAMETERS 3

500 TRENCH CONSTRUCTION 3

510 MATERIALS 4

520 ADDITIONAL REQUIREMENTS 5

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

PILOT METHANE EXTRACTION SYSTEM

Southington Landfill Southington Connecticut

The following document contains an outline specifically developed for the installation of a Pilot Methane Extraction System to be installed at the Southington Landfill Southington Connecticut

100 PURPOSE

The purpose of the pilot system is to evaluate the effectiveness of a forced soil venting system to control methane accumulation at the above referenced site It is understood that if the pilot program yields positive results a more extensive Methane Management System may be instituted

200 PILOT TEST OBJECTIVES

Environmental Applications Inc (EA) has identified the following objectives as a basis for the pilot system design

1 Determine the permeability of the soil to air so that a reasonable pressure gradient can be established to induce methane migration towards the collection trench

2 Determine the lateral extent of this pressure gradient to identify the area of influence of the trench as well as the potential impact of surface breakthrough

3 Determine the usage rates of vapor phase carbon canisters to control odors

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

300 VACUUM EXTRACTION SYSTEM DESCRIPTION

The Pilot Test System is composed of three basic components a vacuum extraction pump a moisture barrier and a vapor phase carbon filter The vacuum extraction pump selected for use at the Southington Landfill is a vortex type blower In operation the vortex blower will generate a high suction medium volume air flow through the perforated pipe in the trench This air stream will then pass through a moisture barrier to minimize the amount of water vapor entering the carbon filters The vapor phase carbon filter system is used for odor control of off-gas

400 PILOT TEST PROCEDURES

Once the trench and vacuum extraction system is installed a series of tests will be conducted to evaluate system performance The tests include varying the vacuum pressure applied to the extraction lines while measuring the pressure gradient adjacent to the trench It is anticipated that this pilot test will require several days to complete The data will be reviewed and the system will be adjusted to achieve maximum performance

In the event that a reasonable area of influence cannot be achieved due to of surface breakthrough additional measures may be required to extend the area of influence One such measure would be the placement of a polyethylene sheet over the ground surface as a temporary impermeable boundary limiting surface breakthrough immediately adjacent to the trench It is recommended that a supplier ofpolyethylene be located as soonshould this option be necessary

construction as possible

grade to avoid delays

(6 mil)

410 Monitoring

It is EAs understanding that the Southington Landfill has been closed since 1967 Prior to 1967 both municipal and industrial wastes were buried at the facility Because of the relatively high methane concentrations observed and the possibility of encountering toxic waste during construction EA recommends that the area around the trench be monitored with a photoionizing vapor analyzer (HNu Model PI-101) during the construction phase The HNu will readily detect a variety of volatile organic compounds but will not respond to methane

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

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APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

The vacuum extraction system is designed to induce methane flow towards the trench therefore an increase in methane concentration in the immediate vicinity of the trench is likely to occur Methane concentrations in this area should be monitored during the pilot testing The vacuum sampling lines can also be used as methane monitoring wells with minor adjustments

420 Design Parameters

Based on the information made available to EA the following parameters have been incorporated in the pilot system design

Trench Dimensions

Overall length - 300 +

Depth (may vary) - 8 assumed

Width 20 - 25

Depth to 16 + Groundwater

Depth to top 8 - 1 1 + of Refuse

Refer to Figure 1 for trench and equipment location plan

500 TRENCH CONSTRUCTION

Depending upon the site conditions two options exist for trench construction If the soil is stable enough to allow the entire trench to be excavated prior to installation of the subsurface venting system this method will be employed as the preferred method of construction However if the excavation becomes unstable or the slope of the side walls becomes excessive a progressive installation of the subsurface venting system will be conducted The perforated pipe specified is corrugated allowing installation from the ground surface Figure 2 depicts a cross section of the completed trench

The construction sequence will be as follows

1 Excavate the trench 20 to 25 Ft wide to the top of the refuse or until groundwater is encountered

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

2 Assemble the vertical riser sections on to the tee couplings at the proper locations A detail of this is presented as Figure 2

3 Place 4 to 6 inches of gravel uniformly on the bottom of the trench

4 Lower the corrugated vent line onto the gravel and center it in the trench

5 Use the bucket of the backhoe to place 18 to 20 inches of gravel backfill on the vent line In order to avoid crushing the vent line the gravel must not be dropped onto the pipe from the top of the trench

6 Place a minimum of 1 layer of 6 mil poly over the gravel prior to backfilling the remainder of the trench Compact the backfill to the same degree as its initial state prior to excavation

NOTE Extra care should be used when backfilling and compacting around the vertical PVC riser pipe

7 Installation of the vacuum sensors (methane wells) will be at the approximate locations shown on the drawings The vacuum sensors will be driven up to a maximum depth of 7 using a driving rod attachment (provided by EA) A cross section of the completed vacuum sensor is shown as Figure 3

510 Materials

The following list of materials should be supplied by the client

ITEM QUANTITY

1 Washed coarse gravel or 1 12 crushed stone 60-65 yd^

2 4 dia perforated drain pipe as manufactured 300 LF by Advanced Draining Systems (ADS) Ludlow MA or equal

3 4 dia solid drain pipe ADS or equal 50 LF

4 4 snap tee for drain pipe ADS or equal 11

5 4 end caps ADS or equal 2

6 4 90O elbows ADS or equal 2

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

7 Polyethylene sheeting 6 mil 2400 FT^ (for trench only)

8 4 dia SCH 40 PVC riser pipe 110 LF (11 - 10 lengths)

9 4 dia PVC caps 10

10 4 dia PVC 90ltgt elbows 1

11 14 copper tubing 200 LF

12 14 compression fittings (Swagelok PN B- 3 100-1-4BT) as manufactured by Swagelok Solon Ohio or equal

13 14 compression fitting caps Swagelok 27 PN B-400-C or equal

14 34 SCH80 steel pipe TBE (13PCS 4 long) 72 LF

15 34 steel couplings 5

16 34 steel endcaps 9

520 Additional Requirements

In addition to the materials listed above a level surface area (approximately 15 X 15) is needed as a base for the treatment equipment See Figure 1 for location Power requirements for the vacuum pump and controls are 110 volt AC 20 Amp service and 230 volt 3 phase 20 amp service in weather proof outlet recepticals

I 1 It 1 r i I i I ni i zi i mdash i j

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reg VAC V )ONA t - E MtOR7

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LOCATIOKJ ^ -^7shy

1 CiB7 -gtvtm5-M LOc v - noK j ( ^ A P P t o y )ENVIRONMENTAL APPLICATIONS INC OCT

METHANF poundNT SVJJTEM PILOT RtV NO OATt IMT OFSCmPTION

^OUTHfM6T0M CT 1 DATEsi-- 2 0 - 8 SCALE bullbull NOM pound 1 JOB No f l - |0faI ]

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

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REV No DATE INT DESCRIPTION lA 1gtOaTMlM6iTr)Kt UAMPPH-c_ C T [DATE ltigtamp7 SCALE- Mfc JCr 1 JOB No RioCoi ]

FOTOBEAM BROOKSIDE

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

J Lbdquo r I I

C-^ ^ W C CAPiraquo

JI-mdash-VACUUM 5EW^iMdj LJMpound

T^shy t=rshy

bull ^

f I f y

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ir =

z J t

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APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

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J

APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

J

APPENDIX C

CORRESPONDENCE

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

GOLDBERG bull ZDINO amp ASSOCIATES INC CONSULTING ENGINEERSGEOLOGISTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (203) 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John Weichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 2 0 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases off-gaqpg --j-i 11 then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

bullthe test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently available to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-rZoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

GDi

] Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACbjg

cc John Weichsel Joe Foglio

]

1 1 1

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

July 21 1989 File No 6-50359

Mr Bill Howard Department of Environmental Protection Solid Waste Management Division 122 Washington Street Hartford Connecticut 06106

Re Apprqvaj tin Hi^mrt fraquon1 Id Waste Disposal Area Pilot Methane Extraction System Southington Connecticut

Dear MrHoward

As we discussed at the request of the Town of Southington Goldberg-Zoino amp Associates Inc of Bridgeport Connecticut and Environmental Applications of Waltham Massachusetts intend to install a pilot methane extraction system at the Old Turnpike Road Landfill (AKA Old Southington Landfill) in Southington Connecticut A map of the area is provided as Figure 1 Sheet 1 of 2 shows the area planned for the pilot system

Based on past soil gas testing methane is present within the closed landfill In building monitoring has not indicated levels of explosive gases within general building confines although methane has been detected within concrete floor cracks The purpose of the pilot extraction system is to provide data necessary to reevaluate methane migration and field conditions for extraction so that a more permanent installation can be developed as may be warranted by site conditions We understand that prior to any excavation to install the test section written approval must be obtained from the Department in accordance with section 22A-209shy7(u) of the Solid Waste Management Regulations

Field activities will be accomplished by Environmental Applications a copy of their intended methane extraction system is attached The landfill encompasses about ten acres of land Based on our current information a two to eight foot thick layer of cover material (fine to medium sand) overlies decomposing refuse mixed with sand Up to 20 feet of refuse was noted in one on-site boring The groundwater table varies from four to fifteen feet below ground surface in the landfill area and is believed to be about twelve to fourteen feet below land surface in the area to be excavated The area of excavation will be plusmn300 feet long by plusmn25 feet wide by an anticipated depth of about 5 to 8 feet The

Copyright 1989 Goldberg-Zoino amp Associates Inc

|gtmdashlaquo^j^Bmiwnpi

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

Mr Bill Howard - Julv 21 1989 - File No 6-50359 - Page Two

excavation will not extend into groundwater nor will significant refuse excavation be performed We anticipate that the maximum amount of material excavated will be 225 cubic yards of that less than 100 cubic yards of refuse is expected Excavated material will be placed adjacent to the trench and covered daily with plastic in order to reduce odors dust and blowing trash Existing cover soil and refuse will be stock piled separately if possible After system installation all refuse will be placed back into the excavation and the soil cover re-established Existing topography in the area of the system is expected to remain generally similar although a slight mound (plusmn1 foot high) along the length of the trench due to the addition of trench materials may result No exposed refuse will be left on-site and no off-site disposal of refuse is intended

Excavation activities will be monitored with an MSA combustible gas indicator and with a photoionization detector (PID) If gas readings of 25 of the methane lower explosive limit (LEL) or PID readings exceeding 25 ppm are encountered within breathing (and motorized equipment) zones excavation will stop until conditions stabilize If significant odors are notable in the vicinity of the excavation or if unstable trench conditions are encountered excavation procedures will be modified so that the excavation is performed in shorter increments and backfill occurs daily We anticipate that excavation pipe placement and backfill will be completed within five working days

If you require additional information in order to approve this activity please do not hesitate to call

Very truly yours

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACelm

Attachments Figures EA Report

cc John Weichsel without attachments

Joe Foglio

-AliJU1

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

C O N T O U R INTERVAL 10 FEET NATIONAL GEODETIC VERTICAL DATUM Of 1929

CM V A APPROXIMATE LANDFILL AREA

bull6 IO Mapped edited and published by the Geological Survey

Revised in cooperation with Connecticut Highway Department iz I

^ Control by USCS NOVNOAA nd Connecticut Ceodclic Suney ouORlaquoNCic iocriOM Topography by pl4nelraquoblc surveys 1 9 4 3 - 1 9 4 4 Revistd from

OL aerial pftotographs taken 1966 Field checked 1967

UJ

OLD SOUTHINGTON LANDFILL SUE LOCUS SOUTHINGTON CT QZV

NOV 1987 FIGURE

r ^ ^ bull ^ B H ^ ^

I

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

February 5 199 0 File No 50359

Bureau of Waste Management Solid Waste ManagementLand Disposal 165 Capitol Avenue Hartford Connecticut 06106

Attention Mr William Howard

Re Methane Pilot Test Old Turnpike Road Landfill Southington Connecticut

Dear Bill

As you requested by telephone on January 30 1990 I have attached a copy of a letter sent to Mr Joe Ulevicus of DEP Air Compliance on July 14 1989 As you will note the letter was based on a June 26 1989 meeting with Joe to discuss the need for air permits for pilot testing of methane extraction It was our understanding from the meeting that an air permit was not necessary

Since we did not receive comment to the contrary from Joe regarding the letter we believe our understanding was correct

If you need additional information please feel free to call

Your very truly

GOLDBERG-ZOINO amp ASSOCIATES INC

Kathleen A Cyr Associate

KACad

cc John Weichsel

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

GOLDBERG-ZOINO S ASSOCIATES INC CONSULTING ENGINEERSGeOLOGlSTSENVIRONMENTAL SCIENTISTS

Trefoil Park 204 Spring Hill Road Trumbull CT 06611 (2031 268-0808 FAX (203) 268-4772

July 14 1989 File No W-61251

Department of Environmental Protection Air Compliance 65 Capitol Avenue Hartford Connecticut

Attention Mr Joseph Ulevicus

Dear Mr Ulevicus

Thank you for meeting with me John VJeichsel and Joe Foglio on June 26 1989 regarding the Old Turnpike Road Landfill in Southington Connecticut

As we explained during our meeting a pilot test for methane extraction will be conducted at the portion of the Old Turnpike Road site to assess the need for and scope of a more permanent installation The pilot system will extract soil vapor over a period of about 20 weeks The soil vapor will be passed through a moisture barrier to minimize water vapor and then through a carbon filter system to control odor in off-gases Off-gases will then discharge to the atmosphere

Based on our conversation with you we understand that a discharge permit is not necessarily provided

the test system discharges less than 5 tons per year of any particular air pollutant

no flaring or burning occurs

an odor control system is in-place and effective and

potential emissions are below 01 pounds per hour (Ibhr) of section 22a-174-29 Table 29-1 parameters 02 Ibhr of Table 29-2 parameters and 04 Ibhr of Table 29-3 parameters

Based on data currently availr ble to us we do not anticipate that any of the above conditions will occur On that basis we will proceed with the test pilot system However after system startshyup air sampling (pre-and post-carbon) will be conducted to verify atmospheric loading rates

Copyright 1989 Goldberg-Zoino amp Associates Inc

Connecticut bull Maine bull Massachusetts bull Michigan bull New Hampshire bull New York bull Pennsylvania bull Rhode Island A subsidiary of GZA GeoEnvironmental Technologies Inc

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

Department of Environmental Protection - July 14 1989 shyFile No W-61251 - Page Two

If you have any questions or comments relative to the above please call If we do not hear to the contrary from you by July 24 1989 we will assume that the understanding discussed above is correct and that no air permit is necessary

Yours very truly

GOLDBERG-ZOIirojl ASSOCIATES INC

n A Cyr late

KACbjg

cc John Weichsel Joe Foglio

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

STATE OF CONNECTICUT DEPARTMENT OF ENVIRONMENTAL PROTECTION

March l6 1990

Mr John Weichsel Town Manager 75 Main Street Southington CT 06489

Dear Mr Weichsel

In accordance with Section 22a-209-7(u) of the Regulations of Connecticut State Agencies the Town of Southingtons request to disrupt the closed solid waste disposal area located on property at 477 and 493 Old Turnpike Road is hereby approved with the following conditions

(1) The proposed pilot methane gas extraction system shall be installed in conformance with plans and specifications prepared by Environmental Applications Incorporated of Waltham Massachusetts and dated June 1987

(2) The pilot methane gas extraction system shall be maintained in such a condition so as to minimize odor emissions therefrom at a l l times during its use and until such time as the system is either permanently discontinued or upgraded to a more pemicinent landfill gais management system

(3) If results from the testing performed in conjunction with the installation of the pilot methane gas extraction system indicate that a permanent landfill gas management system is unnecessary the Tovn of Southington shall cause the use of the pilot system ani each of its components including the electric services supplying the vacuum extraction pump and its controls to be permanently discontinued Each system component shall be either removed from the site (ievacuum extraction pump and its controls and vapor phase carbon filter canisters) or abandoned in place (ie gas collection trench) A system component that is abandoned in place shall be rendered completely inoperable and inaccessibla

(4) The area used as a base for the vacuum extraction pump and landfill gas treatment equipment shall be secured against unauthorized access at all times when the pilot methane gas extraction system is left unattended

Phone

165 Capiiol Avenue bull Harifoid Connecticut 06106

4 - S(7uc Opprunin- Employer

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

blt

(5) If the carbon contained in the vapor phase carbon filter canisters is not regenerated under controlled conditions for subsequent reuse the Town of Southington shall determine the character of such material prior to its disposal report the results of each such determination to the DEP and shall then dispose of this material in accordance with all applicable federal state and local laws

If you should have any questions concerning this matter please contact William A Howard in the Departments Bureau of Waste Management at 566-5847

ours

( jJ W Anderson

Deputy Commissioner

WHyp cc Ms Kathleen A Cyr

Goldberg-Zoino amp Associates 204 Spring Hill Road Trumbull CT 06611

gt

2

X

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

J

J

APPENDIX D

FIELD SUMMARIES

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

L

FIELD SUMMARY File No 4-4-7025

DATE August 9 1990 REPORT No _X _ SHEET X OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_liA WEATHER CONDITIONS Sunny 70s PURPOSE Start-up of Methane Extraction Svstem

Work Accomplished and Observations Made

a Completed final preparations prior to system startup Dave Swetland of GZA assisted in setting up peizometers for measurement The two LEL units were calibrated to methane Le 50 LEL = 25 methane The GZA portable LEL (previously calibrated to propane) read approximately 85 LEL = 25 methane

b Kathie Cyr and Dave Swetland of GZA and the undersigned measiured the gas concentration in three vents (see attached figure) prior to startup LEL concentrations ranged from near 0 LEL up to 100 LEL and over Trace levels of organic vapor^ were also observed by GZA

c System startup was at 1130 hrs Automatic system shut- off occurred within 5 minutes due to methane levels above 30 Methane levels from the trench were measured using the portable LEL unit to be 87 LEL or approximately 25 methane It was necessaiy to completely open the fresh air dilution valve to the system for system operation

d System operation parameters

L E L - 1 18 LEL-2 26 LEL - Portable 87 Oj - Portable 06 Inlet Vacuum 10 inches water Total Flow Rate 74 CFM Fresh Air Valve open 100 Vent System Valve open 100

2 Time Summary

0630 EnAp arrived on site 0755 Dave Swetland of GZA arrived on site 0930 Kathie Cyr arrived on site 1130 System Startup 1230 Kathie Cyr left site 1300 Dave Swetland left site 1330 EnAp left site 1415 EnAp arrive back at office

Distribution

M Hackman KCyr

ON-JOB TIMETRAVEL TIME OFFICE TIMETOTAL TIME

70 hr 07 hr

00 hr 77 hr

PREPARED BY Environmental Applications Inc

L ^ ^ lUlJlj i i i ^ y ^ i j ^^g^ ^ ^ j

FIGURE 1 Town of Southington

Methane Extraction System N LAYOUT

Extraction Plpinc

PROJECT 4-4-7025

LEGEND 0 Vent location (3) Piezometer

location

Fence

laquo493

(D reg (3) reg (D (D reg (a) copy copy - 3 0 mdash

(NOT TO SCALE)

FIELD SUMMARY File No 4-4-7025

DATE August 10 1990 REPORT No _ 2 _ SHEET X OF ^ PROJECT Methane Extraction-System Maint LOCATION SouthingtomCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_JiA WEATHER CONDITIONS PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a Gradually closedfi-esh air dilution valve vmtil system stablized below a LEL of 30 - about 12 open

d System operation parameters

LEI^l 18 LEL-2 26 LEI^Portable 45 Oj-Portable 15 Inlet Vacuum 18 inches of water Total Estimated Row Rate 74 CFM Fresh Air Valve -bull Open 50 Vent System Valve - Open 100

2 Time Summary

0755 EnAp arrived on site 0823 EnAp left site 0901 EnAp arrive back at office

Distribution

M Hackman KCyr

ON-JOB TIME 05 hr TRAVEL TIME 06 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 11 hr Environmental Applications Inc

I

FIELD SUMMARY File No 4-4-7025

DATE August 11 1990 REPORT No _ 3 _ SHEET J_ OF J PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDITIONS Rain 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a System apparently shut off due to high levels of methane

b System would not run with fresh air valve wide open Had to turn down the vent system valve to approximately 10 open

c System operation parameters

LEI^l 15 LEL-2 10 LEL-Portable 86 Oa-Portable 05 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 10

2 Time Summary

1140 EnAp arrived on site 1241 EnAp left site

L ^ ^ lUlJlj i i i ^ y ^ i j ^^g^ ^ ^ j

FIGURE 1 Town of Southington

Methane Extraction System N LAYOUT

Extraction Plpinc

PROJECT 4-4-7025

LEGEND 0 Vent location (3) Piezometer

location

Fence

laquo493

(D reg (3) reg (D (D reg (a) copy copy - 3 0 mdash

(NOT TO SCALE)

FIELD SUMMARY File No 4-4-7025

DATE August 10 1990 REPORT No _ 2 _ SHEET X OF ^ PROJECT Methane Extraction-System Maint LOCATION SouthingtomCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_JiA WEATHER CONDITIONS PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a Gradually closedfi-esh air dilution valve vmtil system stablized below a LEL of 30 - about 12 open

d System operation parameters

LEI^l 18 LEL-2 26 LEI^Portable 45 Oj-Portable 15 Inlet Vacuum 18 inches of water Total Estimated Row Rate 74 CFM Fresh Air Valve -bull Open 50 Vent System Valve - Open 100

2 Time Summary

0755 EnAp arrived on site 0823 EnAp left site 0901 EnAp arrive back at office

Distribution

M Hackman KCyr

ON-JOB TIME 05 hr TRAVEL TIME 06 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 11 hr Environmental Applications Inc

I

FIELD SUMMARY File No 4-4-7025

DATE August 11 1990 REPORT No _ 3 _ SHEET J_ OF J PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDITIONS Rain 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a System apparently shut off due to high levels of methane

b System would not run with fresh air valve wide open Had to turn down the vent system valve to approximately 10 open

c System operation parameters

LEI^l 15 LEL-2 10 LEL-Portable 86 Oa-Portable 05 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 10

2 Time Summary

1140 EnAp arrived on site 1241 EnAp left site

FIELD SUMMARY File No 4-4-7025

DATE August 10 1990 REPORT No _ 2 _ SHEET X OF ^ PROJECT Methane Extraction-System Maint LOCATION SouthingtomCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_JiA WEATHER CONDITIONS PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a Gradually closedfi-esh air dilution valve vmtil system stablized below a LEL of 30 - about 12 open

d System operation parameters

LEI^l 18 LEL-2 26 LEI^Portable 45 Oj-Portable 15 Inlet Vacuum 18 inches of water Total Estimated Row Rate 74 CFM Fresh Air Valve -bull Open 50 Vent System Valve - Open 100

2 Time Summary

0755 EnAp arrived on site 0823 EnAp left site 0901 EnAp arrive back at office

Distribution

M Hackman KCyr

ON-JOB TIME 05 hr TRAVEL TIME 06 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 11 hr Environmental Applications Inc

I

FIELD SUMMARY File No 4-4-7025

DATE August 11 1990 REPORT No _ 3 _ SHEET J_ OF J PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDITIONS Rain 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a System apparently shut off due to high levels of methane

b System would not run with fresh air valve wide open Had to turn down the vent system valve to approximately 10 open

c System operation parameters

LEI^l 15 LEL-2 10 LEL-Portable 86 Oa-Portable 05 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 10

2 Time Summary

1140 EnAp arrived on site 1241 EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 05 hr TRAVEL TIME 06 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 11 hr Environmental Applications Inc

I

FIELD SUMMARY File No 4-4-7025

DATE August 11 1990 REPORT No _ 3 _ SHEET J_ OF J PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDITIONS Rain 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a System apparently shut off due to high levels of methane

b System would not run with fresh air valve wide open Had to turn down the vent system valve to approximately 10 open

c System operation parameters

LEI^l 15 LEL-2 10 LEL-Portable 86 Oa-Portable 05 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 10

2 Time Summary

1140 EnAp arrived on site 1241 EnAp left site

I

FIELD SUMMARY File No 4-4-7025

DATE August 11 1990 REPORT No _ 3 _ SHEET J_ OF J PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDITIONS Rain 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a System apparently shut off due to high levels of methane

b System would not run with fresh air valve wide open Had to turn down the vent system valve to approximately 10 open

c System operation parameters

LEI^l 15 LEL-2 10 LEL-Portable 86 Oa-Portable 05 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 10

2 Time Summary

1140 EnAp arrived on site 1241 EnAp left site

1 Distribution

M Hackman 1 KCyr

ON-JOB TIME 10 hr TRAVEL TIME 00 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 10 hr Environmental Applications Inc

FIELD SUMMARY FUe No 4-4-7025

DATE August 12 1990 REPORT No _ 4 _ SHEET _L OF ^ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JiA WEATHER CONDmONS Humid 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

1 Work Accomplished and Observations Made

a Opened vent system valve approximatel 6 turns

b System operation parameters

LEL-1 17 LEL-2 17 LEL-Portable Oj-Portable Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 60

2 Time Summary

2130 EnAp arrived on site 2155 EnAp left site

FIELD SUMMARY FUe No 4-4-7025

DATE August 12 1990 REPORT No _ 4 _ SHEET _L OF ^ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JiA WEATHER CONDmONS Humid 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

1 Work Accomplished and Observations Made

a Opened vent system valve approximatel 6 turns

b System operation parameters

LEL-1 17 LEL-2 17 LEL-Portable Oj-Portable Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 100 Vent System Valve - Open 60

2 Time Summary

2130 EnAp arrived on site 2155 EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 05 hr TRAVEL TIME _JLiIhi OFHCE TIME 00 hr PREPARED BY TOTAL TIME 05 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 13 1990 REPORT No _ i _ SHEET J_ OF ^ PROJECT Methane Extraction-System Maint LOCATION SoutiiingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS Humid 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a Opened vent system valve completely Qosed fresh air dilution valve 30

b System operation parameters

LEL-1 17 LEL-2 24 LEL-Portable 84 Oj-Portable 11 Inlet Vacuum 07 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 70 Vent System Valve - Open 100

2 Time Summary

0750 EnAp arrived on site 0840 EnAp left site

FIELD SUMMARY File No 4-4-7025

DATE August 13 1990 REPORT No _ i _ SHEET J_ OF ^ PROJECT Methane Extraction-System Maint LOCATION SoutiiingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS Humid 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

a Opened vent system valve completely Qosed fresh air dilution valve 30

b System operation parameters

LEL-1 17 LEL-2 24 LEL-Portable 84 Oj-Portable 11 Inlet Vacuum 07 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 70 Vent System Valve - Open 100

2 Time Summary

0750 EnAp arrived on site 0840 EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 09 hr TRAVEL TIME _ M J i r OFFICE TIME 00 hr PREPARED BY TOTAL TIME 15 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 14 1990 REPORT No _ 6 _ SHEET X OF J_ PROJECT Methane Extraction-Svstem Maint LOCATION SoutiiingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACTORJIA WEATHER CONDrnONS Sunnv 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 60 closed

b System operation parameters

LEL-1 19 LEL-2 24 LEI^Portable 60 02-Portable 14 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 30 Vent System Valve - Open 100

2 Time Summary

0748 EnAp arrived on site 0813 EnAp left site 0915 Arrive at Office

FIELD SUMMARY File No 4-4-7025

DATE August 14 1990 REPORT No _ 6 _ SHEET X OF J_ PROJECT Methane Extraction-Svstem Maint LOCATION SoutiiingtonCr CLIENT Goldberg-Zoino amp Assoc CONTRACTORJIA WEATHER CONDrnONS Sunnv 70s PURPOSE Monitoring of Methane Extraction System - Optimumization

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 60 closed

b System operation parameters

LEL-1 19 LEL-2 24 LEI^Portable 60 02-Portable 14 Inlet Vacuum 10 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 30 Vent System Valve - Open 100

2 Time Summary

0748 EnAp arrived on site 0813 EnAp left site 0915 Arrive at Office

3 Distribution J M Hackman KCyr

ON-JOB TIME 05 hr TRAVEL TIME ^ J L h r OFFICE TIME_JLiLk PREPARED BY TOTAL TIME 15 hr Environmental y^plications Inc

FIELD SUMMARY File No 4-4-7025

3

]

DATE August 15 1990 REPORT No J Z _ SHEET J_ OF ^ PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Optimtimi7aiinn

J

]

]

Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 20 open Dave Swetiand of GZA arrived at 0830 hrs and the undersigned went over the system Barametric pressure was 2992 in Hg according to GZA

J

]

3

b System operation parameters

LEI^l LE]^2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

18 21 48 15 19 inches of water 74 CFM 20 100

2 Time Siunmaiy

0800 0830 0856 0940

EnAp arrived on site Dave Swetiand arrived on site EnAp left site Arrived at office

i -

m

Distribution

M Hackman KCyr

ON-JOB TIME 10 hr TRAVEL TIME 07 hr OFFICE TIME 00 hr PREPARED BY TOTAL TIME 17 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 16 1990 REPORT No _ 8 _ SHEET _1 OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTELACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumi7ti()n

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 10 open

b System operation parameters

LEI^l 19 LEL2 20 LEL-Portable 48 02-Portable 15 Inlet Vacuum 24 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 10 Vent System Valve - Open 100

2 Time Summary

0653 EnAp arrived on site 0705 EnAp left site 0745 Amved at office

FIELD SUMMARY File No 4-4-7025

3

]

DATE August 15 1990 REPORT No J Z _ SHEET J_ OF ^ PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Optimtimi7aiinn

J

]

]

Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 20 open Dave Swetiand of GZA arrived at 0830 hrs and the undersigned went over the system Barametric pressure was 2992 in Hg according to GZA

J

]

3

b System operation parameters

LEI^l LE]^2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

18 21 48 15 19 inches of water 74 CFM 20 100

2 Time Siunmaiy

0800 0830 0856 0940

EnAp arrived on site Dave Swetiand arrived on site EnAp left site Arrived at office

i -

m

Distribution

M Hackman KCyr

ON-JOB TIME 10 hr TRAVEL TIME 07 hr OFFICE TIME 00 hr PREPARED BY TOTAL TIME 17 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 16 1990 REPORT No _ 8 _ SHEET _1 OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTELACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumi7ti()n

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 10 open

b System operation parameters

LEI^l 19 LEL2 20 LEL-Portable 48 02-Portable 15 Inlet Vacuum 24 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 10 Vent System Valve - Open 100

2 Time Summary

0653 EnAp arrived on site 0705 EnAp left site 0745 Amved at office

Distribution

M Hackman KCyr

ON-JOB TIME 10 hr TRAVEL TIME 07 hr OFFICE TIME 00 hr PREPARED BY TOTAL TIME 17 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 16 1990 REPORT No _ 8 _ SHEET _1 OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTELACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumi7ti()n

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 10 open

b System operation parameters

LEI^l 19 LEL2 20 LEL-Portable 48 02-Portable 15 Inlet Vacuum 24 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 10 Vent System Valve - Open 100

2 Time Summary

0653 EnAp arrived on site 0705 EnAp left site 0745 Amved at office

FIELD SUMMARY File No 4-4-7025

DATE August 16 1990 REPORT No _ 8 _ SHEET _1 OF J_ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTELACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumi7ti()n

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve to 10 open

b System operation parameters

LEI^l 19 LEL2 20 LEL-Portable 48 02-Portable 15 Inlet Vacuum 24 inches of water Total Estimated Flow Rate 74 CFM Fresh Air Valve - Open 10 Vent System Valve - Open 100

2 Time Summary

0653 EnAp arrived on site 0705 EnAp left site 0745 Amved at office

Distribution

M Hackman KCyr

J ON-JOB TIME _ Q3hr IRAVEL TIME 07 hr OFFICE TIME 00 hr PREPARED BY TOTAL TIME _ 10 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 17 1990 REPORT No _ i _ SHEET X OF J_ PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_IiA WEATHER CONDinONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumization

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve completely

b System operation parameters

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

20 17 41 16 34 inches of water 74 CFM 0 100

2 Time Summary

0819 0855 0945

EnAp arrived on site EnAp left site Arrived at office

FIELD SUMMARY File No 4-4-7025

DATE August 17 1990 REPORT No _ i _ SHEET X OF J_ PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_IiA WEATHER CONDinONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumization

1 Work Accomplished and Observations Made

a Qosed fresh air dilution valve completely

b System operation parameters

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

20 17 41 16 34 inches of water 74 CFM 0 100

2 Time Summary

0819 0855 0945

EnAp arrived on site EnAp left site Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 06 hr TRAVEL TIME OJhr OFFICE TIME 00 hr PREPARED BY TOTAL TIME 13 hr Environmental Applications Inc

^ bull

I FIELD SUMMARY File No 4-4-7025

DATE August 18 1990 REPORT No i Q _ SHEET J_ OF 1

J

PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtomCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR NA WEATHER CONDrnONS PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

J a System operation parameters

]

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuimi Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

2 Time Smnmary

1500 EnAp arrived on site 1515 EnAp left site

Distribution

M Hackman KCyr

ON-JOB ilMETRAVEL TIMEOFFICE TIMETOTAL TIME

02 hr 00 hr

00 hr 02 hr

15 13 25 18 32 inches of water 74 CFM 0 100

PREPARED BY Environmental App

FIELD SUMMARY FUe No 4-4-7025

DATE August 19 1990 REPORT No 11 SHEET _LOF JL PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumization

Work Accomplished and Observations Made

a System appears to have generally stabilizedvisits Note Vacation 82290 shy 9390

Will cut down the number of

b System operation parameters

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

09 07 32 17 32 inches of water 74 CFM

0 100

2 Time Summary

0749 0757

EnAp arrived on site EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 01 hr TRAVEL TIME 00 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 01 hr Environmental Applications Inc

I FIELD SUMMARY File No 4-4-7025

DATE August 18 1990 REPORT No i Q _ SHEET J_ OF 1

J

PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtomCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR NA WEATHER CONDrnONS PURPOSE Monitoring of Methane Extraction System - Optimumization

Work Accomplished and Observations Made

J a System operation parameters

]

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuimi Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

2 Time Smnmary

1500 EnAp arrived on site 1515 EnAp left site

Distribution

M Hackman KCyr

ON-JOB ilMETRAVEL TIMEOFFICE TIMETOTAL TIME

02 hr 00 hr

00 hr 02 hr

15 13 25 18 32 inches of water 74 CFM 0 100

PREPARED BY Environmental App

FIELD SUMMARY FUe No 4-4-7025

DATE August 19 1990 REPORT No 11 SHEET _LOF JL PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumization

Work Accomplished and Observations Made

a System appears to have generally stabilizedvisits Note Vacation 82290 shy 9390

Will cut down the number of

b System operation parameters

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

09 07 32 17 32 inches of water 74 CFM

0 100

2 Time Summary

0749 0757

EnAp arrived on site EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 01 hr TRAVEL TIME 00 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 01 hr Environmental Applications Inc

FIELD SUMMARY FUe No 4-4-7025

DATE August 19 1990 REPORT No 11 SHEET _LOF JL PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Optimumization

Work Accomplished and Observations Made

a System appears to have generally stabilizedvisits Note Vacation 82290 shy 9390

Will cut down the number of

b System operation parameters

LEL-1 LEL-2 LEI^Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

09 07 32 17 32 inches of water 74 CFM

0 100

2 Time Summary

0749 0757

EnAp arrived on site EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 01 hr TRAVEL TIME 00 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 01 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE August 22 1990 REPORT No _12_ SHEET _L OF J PROJECT Metiiane Extraction-Svstem Maint LOCATION SouthingtonCT CUENT Goldberg-Zoino amp Assoc CONTRACTOR_NA WEATHER CONDTnONS PURPOSE Monitoring of Metiiane Extraction Svstem - r)pt m m 7J t bull ^

Work Accomplished and Observations Made

a System appears to have generally stabilized Will cut down the number of visits Note Vacation 82290 - 9390

b System operation parameters

LEU LEL-2 LEI^Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

05 02

0 100

2 Time Summary

11001105

EnAp arrived on site EnAp left site

Distribution

M Hackman KCyr

ON-JOB TIME 01 hr TRAVEL TIME 00 hr OFHCE TIME _ 00 hr PREPARED BY TOTAL TIME 01 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE September 4 1990 REPORT No 13 SHEET _L OF J^ PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT ] CLIENT Goldberg-Zoino amp Assoc CONTRACTOR NA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Monitoring

1 Work Accomplished and Observations Made

a System has stabilized

System operation parameters

LEL-1 LEL-2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated Flowrate Fresh Air Valve - Open Vent System Valve - Open

04 03 0 209 32 inches of water 74 CFM

0 100

2 Time Summary

072307370820

EnAp arrived on site EnAp left site Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 02 hr TRAVEL TIME 07 hr OFFICE TIME 01 hr PREPARED BY TOTAL TIME 10 hr Environmental App

FIELD SUMMARY File No 4-4-7025

DATE September 7 1990 REPORT No 14 SHEET J_ OF ^ PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_IiA WEATHER CONDrnONS PURPOSE Monitoring of Methane Extraction System - Monitoring

Work Accomplished and Observations Made

a Took complete set of piezometer Readings Please see attached sketch for locations Also see attached corresponding depths of piezometers It is noted that the magnohelic gage currentiy being utilzed for measurement of vacuum generated at the piezometers appears not to be adequate A new more accurate gage will be ordered

Vent No Location Depth Reading

2 0 -01 Inches Water 2 A S -01 2 A M -

2 A D -005 2 B S -

2 B M -

2 B D

2 C S -

2 C D -

5 0 - -02 5 A S -015 5 A M -02 5 A D -01 5 B S -01 5 B M -01 5 B D -01 5 C S -005 5 C M -005 5 C D -

9 0 0 -015 9 A S -01 9 A M -005

9 A D -005 9 B S -005 9 B M -005

Vent No Location Depth Reading

9 B D -005 9 C S -

9 C M -

9 C D -

b System operation parameters

u

mdash

-

LEI^l LEI^2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated Flow Rate Fresh Air Valve - Open Vent System Valve - Open

04 02 0 202 32 inches of water 776 CFM

0 100

mdash 2 Time Summary

-072008300910

EnAp arrived on site EnAp left site Arrived at office

-Distribution

-

M Hackman KCyr

mdash ON-JOB TIMETRAVEL TIMEOFHCE TIMETOTAL TIME

11 hr 06 hr

00 hr 17 hr

PREPARED BY Environmental App

Town of Southington Piezometer Depths

(feet)

] Vent No Location Depth Elevation

J

2 0 34 2 A S 17 2 A M 37 2 A D 57 2 B S 25 2 B M 45 2 B D 65 2 C S 56 2 C D 76

]

5 0 36 5- A S 22 5 A M 42 5 A D 62 5 B S 41 5 B M 61 5 B D 81 5 C S 46 5 C M 66 5 C D 86 9 0 0 27 9 A S 27

A 37 ] 9 M 9 A D 57 9 B S 30 9 B M 40 9 B D 60 9 C S 27 9 C M 47 9 C D 67

Notes Elevations are relative to trench pipe invert depth below ground surface at each vent location

Elevations taken June 7 1990

FIELD SUMMARY File No 4-4-7025

DATE September 10 1990 REPORT No i l _ SHEET _1_ OF X PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JiA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Monitoring

1 Work Accomplished and Observations Made

a System appears to have stabilized Monitoring will be cut to 1-2 days per week

b System operation parameters

LEL-1 LEU-2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated How Rate Fresh Air Valve - Open Vent System Valve - Open

04 03 0 202 315 inches of water 740 CFM

0 100

2 Time Summary

0736 0756 0859

EnAp arrived on site EnAp left site Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 03 hr TRAVEL TIME 09 hr OFHCE TIME _ 00 hr PREPARED BY TOTAL TIME 12 hr Environmental Applications Inc

Town of Southington Piezometer Depths

(feet)

] Vent No Location Depth Elevation

J

2 0 34 2 A S 17 2 A M 37 2 A D 57 2 B S 25 2 B M 45 2 B D 65 2 C S 56 2 C D 76

]

5 0 36 5- A S 22 5 A M 42 5 A D 62 5 B S 41 5 B M 61 5 B D 81 5 C S 46 5 C M 66 5 C D 86 9 0 0 27 9 A S 27

A 37 ] 9 M 9 A D 57 9 B S 30 9 B M 40 9 B D 60 9 C S 27 9 C M 47 9 C D 67

Notes Elevations are relative to trench pipe invert depth below ground surface at each vent location

Elevations taken June 7 1990

FIELD SUMMARY File No 4-4-7025

DATE September 10 1990 REPORT No i l _ SHEET _1_ OF X PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JiA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Monitoring

1 Work Accomplished and Observations Made

a System appears to have stabilized Monitoring will be cut to 1-2 days per week

b System operation parameters

LEL-1 LEU-2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated How Rate Fresh Air Valve - Open Vent System Valve - Open

04 03 0 202 315 inches of water 740 CFM

0 100

2 Time Summary

0736 0756 0859

EnAp arrived on site EnAp left site Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 03 hr TRAVEL TIME 09 hr OFHCE TIME _ 00 hr PREPARED BY TOTAL TIME 12 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE September 10 1990 REPORT No i l _ SHEET _1_ OF X PROJECT Methane Extraction-Svstem Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JiA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Monitoring

1 Work Accomplished and Observations Made

a System appears to have stabilized Monitoring will be cut to 1-2 days per week

b System operation parameters

LEL-1 LEU-2 LEL-Portable Oj-Portable Inlet Vacuum Total Estimated How Rate Fresh Air Valve - Open Vent System Valve - Open

04 03 0 202 315 inches of water 740 CFM

0 100

2 Time Summary

0736 0756 0859

EnAp arrived on site EnAp left site Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 03 hr TRAVEL TIME 09 hr OFHCE TIME _ 00 hr PREPARED BY TOTAL TIME 12 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE September 14 1990 REPORT No _ l i _ SHEET X OF _L PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_J^A WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction System - Monitoring

1 Work Accomplished and Observations Made

a System appears to have stabilized Monitoring will be cut to 1-2 days per week

b Tested an inclined manameter at the site as a new vacuum gage It appeared to perform satisfactorily It is planned that another round of piezometer readings will be performed next monitoring

c System operation parameters

LEI^l 04 LEL-2 02 LEL-Portable 0 Oj-Portable 202 Inlet Vacuum 28 inches of water Total Row Rate 759 CFM Fresh Air Valve - Open 0 Vent System Valve - Open 100

2 Time Summary

0745 EnAp arrived on site 0850 EnAp left site 0930 Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 10 hr TRAVEL TIME _ M J i r OFHCE TIME 00 hr PREPARED BY TOTAL TIME 16 hr Environmental gt^plications Inc

2

FIELD SUMMARY File No 4-4-7025

DATE September 21 1990 REPORT No _I7_ SHEET _L OF _2 PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDrnONS PURPOSE Monitoring of Methane Extraction System - Monitoring

Work Accomplished and Observations Made

a Took complete set of piezometer Readings Please see attached sketch for locations Also see attached corresponding depths of piezometers It is noted that a new inclined manometer capable of readings between 0 and 3 inches of water is being utilized Strainer was saturated - removed as much moisture as possible

Vent No Location Depth Reading

2 0 Inches of Water 2 A S -0095 2 A M -004 2 A D -0035 2 B S -002 2 B M -002 2 B D shy

2 C S shy

2 C D shy

5 0 - -013 5 A S -011 5 A M -014 5 A D -005 5 B S -008 5 B M -004 5 B D -006 5 C S -0045 5 C M -005 5 C D

9 0 0 -013 9 A S -0065 9 A M -006 9 A D -003

yraquoamp

2

FIELD SUMMARY File No 4-4-7025

DATE September 21 1990 REPORT No _I7_ SHEET _L OF _2 PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACrOR_NA WEATHER CONDrnONS PURPOSE Monitoring of Methane Extraction System - Monitoring

Work Accomplished and Observations Made

a Took complete set of piezometer Readings Please see attached sketch for locations Also see attached corresponding depths of piezometers It is noted that a new inclined manometer capable of readings between 0 and 3 inches of water is being utilized Strainer was saturated - removed as much moisture as possible

Vent No Location Depth Reading

2 0 Inches of Water 2 A S -0095 2 A M -004 2 A D -0035 2 B S -002 2 B M -002 2 B D shy

2 C S shy

2 C D shy

5 0 - -013 5 A S -011 5 A M -014 5 A D -005 5 B S -008 5 B M -004 5 B D -006 5 C S -0045 5 C M -005 5 C D

9 0 0 -013 9 A S -0065 9 A M -006 9 A D -003

yraquoamp

1 ^ Vent No Location Depth Reading

^ 9 B S -001 9 6 M -002 9 B D -003

1 9 C S -002 9 C M -003 9 C D -001

System operation parameters

1

LFL-1 04 TFL-2 04 LEL-Portable 0 02-Portable 202 Inlet Vacuum 28 inches of water Total How Rate 743 CFM Fresh Air Valve - Open 0 Vent System Valve - Open 100

2 Time Summary

0808 EnAp arrived on site 0940 EnAp left site 1020 Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 15 hr TRAVEL TIME 06 hr OFHCE TIME 00 hr PREPARED BY TOTAL TIME 21 hr Environmental Applications Inc

FIELD SUMMARY File No 4-4-7025

DATE September 25 1990 REPORT No Ufi_ SHEET J ^ OF JL PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JIA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Monitoring

]

1 Work Accomplished and Observations Made

a System has stabilized

b System operation parameters

LEI^l 05 LEL-2 04 LEL-Portable 0 Oj-Portable 209 Inlet Vacuum 28 inches of water Total Flow Rate 742 CFM Fresh Air Valve - Open 0 Vent System Valve - Open 100

2 Time Summary

0730 EnAp arrived on site 0748 EnAp left site 0830 Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 03 hr TRAVEL TIME 06 hr OFFICE TIME 09 hr PREPARED BY TOTAL TIME 10 hr Environmental App

FIELD SUMMARY File No 4-4-7025

DATE September 25 1990 REPORT No Ufi_ SHEET J ^ OF JL PROJECT Methane Extraction-System Maint LOCATION SouthingtonCT CLIENT Goldberg-Zoino amp Assoc CONTRACTOR_JIA WEATHER CONDmONS PURPOSE Monitoring of Methane Extraction Svstem - Monitoring

]

1 Work Accomplished and Observations Made

a System has stabilized

b System operation parameters

LEI^l 05 LEL-2 04 LEL-Portable 0 Oj-Portable 209 Inlet Vacuum 28 inches of water Total Flow Rate 742 CFM Fresh Air Valve - Open 0 Vent System Valve - Open 100

2 Time Summary

0730 EnAp arrived on site 0748 EnAp left site 0830 Arrived at office

Distribution

M Hackman KCyr

ON-JOB TIME 03 hr TRAVEL TIME 06 hr OFFICE TIME 09 hr PREPARED BY TOTAL TIME 10 hr Environmental App

W35f

FIELD SUMMARY File No 4-4-7025

Date December 5 1990 Report No 19 Sheet 1 of 3

Project Svstem Maintenance Location Southington Connecticut

Client GZA Contractor NA ^

Weather GonditionsCold windy snow flurries 30s

Remarks Pilot test2 Vertical and Horizontal Influence with large blower Mliiiliilllilliilliilillillllll

1 Work Accomplished and Observations Make

Fabricated 7 new vent caps with barbed hose fittings for vacuum measurement purposes Prior to startup of system all vents were measured using a LEL for methane and oxygen No readings were observed The system was turned on at 0942 hours The system was allowed to stabilized for approximately 35 minutes prior to the taking of the vacuum measurements The following measurements were taken

Flow Rate 260 CFM

] Vacuum at system inlet -5 inches of water

I Vent No Location Depth Time Reading

1 0 1017 -04 inches water 2 0 0 -04 1 s

3 2 A -03 2 A M 2 A D -02 2 B S -015 2 B M 2 B D 2 0 S 2 0 M

-3 0 -04 -4 0 -04 -5 0 1042 -07

5 A S -06 5 A M -06 5 A D -035 5 B S -045 5 B M 5 B D -03 5 C S -03

GZAR 1

FIELD SUMMARY File No 4-4-7025

Date December 51990

Vent No

5 5 6 7 8 9 9 9 9 9 9 9 9 9 9 1 2 2 3 4 5 5 6 7 8 9 9

Note plugged

2 Time

Location Deoth

0 M 0 D

0

0

0 0 w A S A M A D B S B M B D 0 S 0 M 0 D

bull0 -0

B S -0 -0 -0

B s -0 0 -0 0

B s

= A positive reading

Summary

Report No 19 Sheet 2 of 3

Time Reading

-03

-06 -045 -04 -04 -01 -02 -01 -01 -01 -01 -01 -01

1114

1131 -04 -04 -015 -04 -04

1137 -07 -04 -06 -04 -04

1142 -04 -01

was observed indicating that the piezometer may be

0725 GZAR amved on site 0942 System turned on 1150 System turned off 1159 GZAR left site 1245 GZAR anived at office 1

1 1 i

GZAR

^

bull ^

^ 9 ^

i 1 1 I

1

FIELD SUMMARY

Date December 5 1990 Report No 19

Distribution

M Hackman laquo KCyr M Barvenik

On-Job Time 45 Travel Time 07 Office Time 00

bull - bull

Total Time 52

File No 4-4-7025

Sheet 3 of 3

James J Feltz Prepared By

GZAR

APPENDDC E

LABORATORY REPORT

]

j

]

]

]

1

i CEIMIC

CORPORATION Chemical Analysis for Ermronmental Managemeru

J ]

]

]

]

1 ]

1 1 ]

1

Augus t 2 8 1990

Mr David Swetland Goldberg-Zoino amp Associates 140 Broadway Providence RI 02903

Dear Mr Swetland

Enclosed are the analytical results for the analysis of two sets of air samples which were received at CEIMIC on August 20 1990

Please note that due to the lacl^of sample concentration procedures method reporting limiCsare tabulated at the mgm3 lSVeplusmni ~to reflect instrumental detection limits of 5 to 10 nanogram for the target analytes For several of the nontarget analytes including carbon dioxide -metJiane and sulfor dioxide the method reporting limits are estimated values as indicated in the data reports While we did not pick up~ ny odor for the Influent Scunple we did observe a slight aroma for the Effluent sample

Please call if you have any questions

Sincerely

Kin S Chiu Manager Organic Laboratory

End

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

1

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Date Scuaple Received NA Date Scimple Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

Sample Method Target Analyte Concentration Reporting Limits

Chioromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride 02 02 Acetone ND 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromod ichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

FIELD SUMMARY File No 4-4-7025

Date December 51990

Vent No

5 5 6 7 8 9 9 9 9 9 9 9 9 9 9 1 2 2 3 4 5 5 6 7 8 9 9

Note plugged

2 Time

Location Deoth

0 M 0 D

0

0

0 0 w A S A M A D B S B M B D 0 S 0 M 0 D

bull0 -0

B S -0 -0 -0

B s -0 0 -0 0

B s

= A positive reading

Summary

Report No 19 Sheet 2 of 3

Time Reading

-03

-06 -045 -04 -04 -01 -02 -01 -01 -01 -01 -01 -01

1114

1131 -04 -04 -015 -04 -04

1137 -07 -04 -06 -04 -04

1142 -04 -01

was observed indicating that the piezometer may be

0725 GZAR amved on site 0942 System turned on 1150 System turned off 1159 GZAR left site 1245 GZAR anived at office 1

1 1 i

GZAR

^

bull ^

^ 9 ^

i 1 1 I

1

FIELD SUMMARY

Date December 5 1990 Report No 19

Distribution

M Hackman laquo KCyr M Barvenik

On-Job Time 45 Travel Time 07 Office Time 00

bull - bull

Total Time 52

File No 4-4-7025

Sheet 3 of 3

James J Feltz Prepared By

GZAR

APPENDDC E

LABORATORY REPORT

]

j

]

]

]

1

i CEIMIC

CORPORATION Chemical Analysis for Ermronmental Managemeru

J ]

]

]

]

1 ]

1 1 ]

1

Augus t 2 8 1990

Mr David Swetland Goldberg-Zoino amp Associates 140 Broadway Providence RI 02903

Dear Mr Swetland

Enclosed are the analytical results for the analysis of two sets of air samples which were received at CEIMIC on August 20 1990

Please note that due to the lacl^of sample concentration procedures method reporting limiCsare tabulated at the mgm3 lSVeplusmni ~to reflect instrumental detection limits of 5 to 10 nanogram for the target analytes For several of the nontarget analytes including carbon dioxide -metJiane and sulfor dioxide the method reporting limits are estimated values as indicated in the data reports While we did not pick up~ ny odor for the Influent Scunple we did observe a slight aroma for the Effluent sample

Please call if you have any questions

Sincerely

Kin S Chiu Manager Organic Laboratory

End

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

1

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Date Scuaple Received NA Date Scimple Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

Sample Method Target Analyte Concentration Reporting Limits

Chioromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride 02 02 Acetone ND 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromod ichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

^

bull ^

^ 9 ^

i 1 1 I

1

FIELD SUMMARY

Date December 5 1990 Report No 19

Distribution

M Hackman laquo KCyr M Barvenik

On-Job Time 45 Travel Time 07 Office Time 00

bull - bull

Total Time 52

File No 4-4-7025

Sheet 3 of 3

James J Feltz Prepared By

GZAR

APPENDDC E

LABORATORY REPORT

]

j

]

]

]

1

i CEIMIC

CORPORATION Chemical Analysis for Ermronmental Managemeru

J ]

]

]

]

1 ]

1 1 ]

1

Augus t 2 8 1990

Mr David Swetland Goldberg-Zoino amp Associates 140 Broadway Providence RI 02903

Dear Mr Swetland

Enclosed are the analytical results for the analysis of two sets of air samples which were received at CEIMIC on August 20 1990

Please note that due to the lacl^of sample concentration procedures method reporting limiCsare tabulated at the mgm3 lSVeplusmni ~to reflect instrumental detection limits of 5 to 10 nanogram for the target analytes For several of the nontarget analytes including carbon dioxide -metJiane and sulfor dioxide the method reporting limits are estimated values as indicated in the data reports While we did not pick up~ ny odor for the Influent Scunple we did observe a slight aroma for the Effluent sample

Please call if you have any questions

Sincerely

Kin S Chiu Manager Organic Laboratory

End

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

1

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Date Scuaple Received NA Date Scimple Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

Sample Method Target Analyte Concentration Reporting Limits

Chioromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride 02 02 Acetone ND 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromod ichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

APPENDDC E

LABORATORY REPORT

]

j

]

]

]

1

i CEIMIC

CORPORATION Chemical Analysis for Ermronmental Managemeru

J ]

]

]

]

1 ]

1 1 ]

1

Augus t 2 8 1990

Mr David Swetland Goldberg-Zoino amp Associates 140 Broadway Providence RI 02903

Dear Mr Swetland

Enclosed are the analytical results for the analysis of two sets of air samples which were received at CEIMIC on August 20 1990

Please note that due to the lacl^of sample concentration procedures method reporting limiCsare tabulated at the mgm3 lSVeplusmni ~to reflect instrumental detection limits of 5 to 10 nanogram for the target analytes For several of the nontarget analytes including carbon dioxide -metJiane and sulfor dioxide the method reporting limits are estimated values as indicated in the data reports While we did not pick up~ ny odor for the Influent Scunple we did observe a slight aroma for the Effluent sample

Please call if you have any questions

Sincerely

Kin S Chiu Manager Organic Laboratory

End

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

1

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Date Scuaple Received NA Date Scimple Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

Sample Method Target Analyte Concentration Reporting Limits

Chioromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride 02 02 Acetone ND 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromod ichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

i CEIMIC

CORPORATION Chemical Analysis for Ermronmental Managemeru

J ]

]

]

]

1 ]

1 1 ]

1

Augus t 2 8 1990

Mr David Swetland Goldberg-Zoino amp Associates 140 Broadway Providence RI 02903

Dear Mr Swetland

Enclosed are the analytical results for the analysis of two sets of air samples which were received at CEIMIC on August 20 1990

Please note that due to the lacl^of sample concentration procedures method reporting limiCsare tabulated at the mgm3 lSVeplusmni ~to reflect instrumental detection limits of 5 to 10 nanogram for the target analytes For several of the nontarget analytes including carbon dioxide -metJiane and sulfor dioxide the method reporting limits are estimated values as indicated in the data reports While we did not pick up~ ny odor for the Influent Scunple we did observe a slight aroma for the Effluent sample

Please call if you have any questions

Sincerely

Kin S Chiu Manager Organic Laboratory

End

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

1

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Date Scuaple Received NA Date Scimple Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

Sample Method Target Analyte Concentration Reporting Limits

Chioromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride 02 02 Acetone ND 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromod ichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

1

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Date Scuaple Received NA Date Scimple Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

Sample Method Target Analyte Concentration Reporting Limits

Chioromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride 02 02 Acetone ND 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromod ichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGIOTICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Ambiant Air Blank Laboratory ID V60820-B2

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

NA = Not appliccible ND = Not detected Estimated reporting limits

Reported by He Approved by US

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Influent Lciboratory ID 900636-01

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm

Sample Method Target Analyte Concentration Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 07 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 1 l-DichloroetAane ND 02 12-Dichloroethene (total) ND 02 Chloroform ND 02 12-Dichloroethane ND 02 2-Butanone ND 04 111-TrichloroetJiane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

Page 1 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysisfor Environmental Management

VOLATILE 0R6ANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Seunple ID Air Influent Ladaoratory ID 900636-01

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene ND 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone ND 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

P Aoorove bv -raquoReported by H Approvedd by

Page 2 of 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Environmental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent Lciboratory ID 900636-02

Date Sample Received 82090 Date Sample Prepared 82090

Date Sample Analyzed 82090 Concentration in mgm^

J Target Analyte Sample

Concentration Method

Reporting Limits

Chloromethane ND 04 Bromomethane ND 04 Vinyl chloride ND 04 Chloroethane ND 04 Methylene chloride ND 02 Acetone 11 04 Carbon disulfide ND 02 11-Dichloroethene ND 02 11-Dichloroethane ND 02

1 12-Dichloroethene (total) Chloroform 12-Dichloroethane

ND ND ND

02 02 02

2-Butanone ND 04 111-Trichloroethane ND 02 Carbon tetrachloride ND 02 Vinyl acetate ND 04 Bromodichloromethane ND 02 12-Dichloropropane ND 02 cis-l3-Dichloropropene ND 02 2-Chloroethylvinyl ether ND 02 Trichloroethene ND 02 Dibromochloromethane ND 02 112-Trichloroethane ND 02 Benzene ND 02

P a g e 1 o f 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905

CEIMIC CORPORATION

Chemical Analysis for Envirownental Management

VOLATILE ORGANICS

EPA Method 6248240

Client Goldberg Zoino amp Associates

Client Sample ID Air Effluent LeQDoratory ID 900636-02

Sample Method Target Analyte Concentration Reporting Limits

trans-13-Dichloropropene 03 02 Bromoform ND 02 4-Methyl-2-pentanone ND 04 2-Hexanone 05 04 1122-Tetrachloroethane ND 02 Tetrachloroethene ND 02 Toluene ND 02 Chlorobenzene ND 02 Ethyl benzene ND 02 Styrene ND 02 Xylene (total) ND 02 Methane ND 10 Sulfur Dioxide ND 10 Carbon Dioxide ND 1

ND = Not detected Estimated reporting limits

Reported by K C Approved by ^

Page 2 o t 2

100 Dean Knauss Drive Narragansett RI 02882 bull (401) 782-8900 bull FAX (401) 782-8905