fairbanks disposal acknowledgments pit - soil and water...

1

Fairbanks Disposal Pit

Wm. Gordon Dean, PEWm. Gordon Dean, PEVice President, EngineeringVice President, Engineering

WRS Infrastructure & EnvironmentWRS Infrastructure & Environment

AcknowledgmentsAcknowledgments

Florida Department of Florida Department of T t ti Di t i t IIT t ti Di t i t IITransportation, District IITransportation, District IIJohn Collins, PEJohn Collins, PECurtis BarnesCurtis BarnesTerry Zinn, Esq.Terry Zinn, Esq.

SITE BACKGROUNDSITE BACKGROUND

10 Acre Sand Borrow Pit10 Acre Sand Borrow Pit Waste Disposal 1956 to 1982Waste Disposal 1956 to 1982 Asphalt Testing SolventsAsphalt Testing Solvents 1 1 11 1 1 TCA Benzene TCETCA Benzene TCE 1,1,11,1,1--TCA, Benzene, TCETCA, Benzene, TCE Distillation/Recycling until 1978Distillation/Recycling until 1978 Drums and Free Liquid DisposalDrums and Free Liquid Disposal

PREVIOUS ACTIVITIES

1983 1983 -- Removal of 1,046 drumsRemoval of 1,046 drums 1990 1990 -- Removal of 345 drumsRemoval of 345 drums Limited soil removalLimited soil removal Groundwater assessmentGroundwater assessment OnOn--site groundwater recovery systemsite groundwater recovery system RCRA closure permit applicationRCRA closure permit application

PROJECT OBJECTIVES

EPA CERCLA 106(a) ORDEREPA CERCLA 106(a) ORDER Issued December 1993Issued December 1993 Obtain Clean Closure of Site SoilsObtain Clean Closure of Site Soils Complete Home Well Complete Home Well

Abandonment and Replacement Abandonment and Replacement ProgramProgram

Design and Implement a Groundwater Design and Implement a Groundwater Treatment System(s)Treatment System(s)

GRU WELLFIELD LOCATION MAP

SITE

3.22 km (2 MILE) RADIUS FROM SITEGRU

PRODUCTION WELLS

RADIUS FROM SITEGRU

GAINESVILLE

GAINESVILLE REGIONAL AIRPORT

2

Soil Closure Program

PRE-EXISTING SITE CONDITIONS

GETTING STARTED

PUBLIC MEETINGS PUBLIC MEETINGS LAND SURVEYING LAND SURVEYING GEOPHYSICAL SURVEYINGGEOPHYSICAL SURVEYING GEOPHYSICAL SURVEYINGGEOPHYSICAL SURVEYING DRUM STORAGE DRUM STORAGE SITE CONSTRUCTIONSITE CONSTRUCTION

SITE PLANPOST-CONSTRUCTION

SOIL PROCESSING

AREA

LOWER POND

FORMER UPPER POND

WET AREA/SPRAY FIELD

SCALE

DECON AREA

EPA

WRS ENTRANCE

FENCE LINE

FDOT

SAMPLING AND ANALYSIS

30 FOOT GRID SAMPLING30 FOOT GRID SAMPLING 100 FOOT GRID SAMPLING100 FOOT GRID SAMPLING

EXCAVATION, PROCESSING, AND DISPOSAL

MATERIAL EXCAVATEDMATERIAL EXCAVATED SoilsSoils--Total Processed = 111,688 cu ydsTotal Processed = 111,688 cu yds

100,556 Clean / 11,132 Industrial100,556 Clean / 11,132 Industrial

DD 35 T t l 5 H d35 T t l 5 H d Drums Drums -- 35 Total, 5 Hazardous 35 Total, 5 Hazardous Debris Debris --Concrete, Wood, MetalConcrete, Wood, Metal 1,024 Tons of RC70 Material1,024 Tons of RC70 Material

DISPOSALDISPOSAL Landfill / Artificial Reef (255 Tons)Landfill / Artificial Reef (255 Tons)

3

SOIL EXCAVATION DEBRIS DECONTAMINATION

CONCRETE DEBRIS FOR ARTIFICIAL REEF SOIL PROCESSING

MOBILE LABORATORY TRUCK LOAD OUT

4

TRUCK DECONTAMINATIONTRUCK LOAD OUT/SCALES

AND TICKETING

FINAL SOIL CLOSURE ACTIVITIES

MODIFIED RCRA CAP MODIFIED RCRA CAP STORMWATER RETENTIONSTORMWATER RETENTION FINAL GEOPHYSICALFINAL GEOPHYSICAL POST CLOSUREPOST CLOSURE

Demolish Structures & Demobilization Demolish Structures & Demobilization ActivitiesActivities

Transition to Aquifer RemediationTransition to Aquifer Remediation

BACKFILL OPERATIONS/RCRA CAP

RCRA CAP / LINED POND WILD FLOWERS

5

WILDFLOWERS WILDFLOWERS

Residential Well Closure Program

PROBLEMS

IMPROPER WELL CONSTRUCTIONIMPROPER WELL CONSTRUCTION CONTAMINATION SPREAD THROUGH CONTAMINATION SPREAD THROUGH

THESE CONDUITSTHESE CONDUITSTHESE CONDUITSTHESE CONDUITS ANGRY RESIDENTSANGRY RESIDENTS

AQUIFER PROFILE

150’

175’

100’

SURFICIAL AQUIFER

UPPER HAWTHORN

BURIED DRUMS

FAIRBANKS DISPOSAL PIT HATCHET

CREEK

WELLS

50’

0’

-50’

SEMI-CONFINING UNIT

UPPER INTERMEDIATE

AQUIFER

LOWER HAWTHORN

CONFINING UNIT

HAWTHORN BASAL CLAYFLORIDAN AQUIFER

OCALA GROUP

HOMEWELL LOCATION MAP

HATCHET CREEK

FLOOD PLAIN LIMIT

1.61 km (1 MILE) RADIUS FROM SITE

KNOWN DOMESTIC WELL LOCATION (TYPICAL)

SITE

N.E

. 39t

h S

T

6

PROCESS

OBTAIN PERMISSION TO ENTER OBTAIN PERMISSION TO ENTER PROPERTY FROM HOMEOWNERPROPERTY FROM HOMEOWNER

REMOVE ANY EXISTING WELLREMOVE ANY EXISTING WELL REMOVE ANY EXISTING WELL REMOVE ANY EXISTING WELL COMPONENTSCOMPONENTS

PROCESS

GAUGE WELL CONDITION VIA CALIPER, GAUGE WELL CONDITION VIA CALIPER, GAMMA, AND RESISTIVITY LOGSGAMMA, AND RESISTIVITY LOGS

SAMPLE WELLS FOR TARGET COMPOUNDSSAMPLE WELLS FOR TARGET COMPOUNDS

Volatile OrganicsVolatile Organics Abbreviated MetalsAbbreviated Metals

WELL LOGGING VAN PROCESS

PROPERLY ABANDON WELLSPROPERLY ABANDON WELLS REPLACE WITH PROPERLY CONSTRUCTED REPLACE WITH PROPERLY CONSTRUCTED

WELL PER SELECTION CRITERIAWELL PER SELECTION CRITERIA RERE--SAMPLE WELL FOR TARGET COMPOUNDSSAMPLE WELL FOR TARGET COMPOUNDS VIDEO LOG WELL VIDEO LOG WELL

PROCESS

REPLACE PUMPS, TANKS, AND SYSTEM REPLACE PUMPS, TANKS, AND SYSTEM PIPING AND WIRING AND OBTAIN PIPING AND WIRING AND OBTAIN HOMEOWNER SIGNHOMEOWNER SIGN--OFFOFF

WELL ABANDONMENT

EACH WELL REVIEWED ON CASE BY CASE EACH WELL REVIEWED ON CASE BY CASE BASISBASIS Construction DetailsConstruction DetailsConstruction DetailsConstruction Details Groundwater Analytical ResultsGroundwater Analytical Results Geophysical Logging DataGeophysical Logging Data Well Location with Regard to Known Well Location with Regard to Known

ContaminationContamination

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WELL ABANDONMENT

LICENSED WATER WELL CONTRACTOR:LICENSED WATER WELL CONTRACTOR: Pulled PermitsPulled Permits Complete Abandonment / Pressure GroutingComplete Abandonment / Pressure Grouting Complete Abandonment / Pressure GroutingComplete Abandonment / Pressure Grouting File Well Abandonment ReportsFile Well Abandonment Reports Goal was to Eliminate Cross Connections Goal was to Eliminate Cross Connections

Throughout the AreaThroughout the Area

WELL ABANDONMENT

WELL ABANDONMENT REPLACEMENT WELL PROGRAM

THIS AVOIDED “PROPERTY TAKING THIS AVOIDED “PROPERTY TAKING ISSUES”ISSUES”

SJRWMD MANDATED THAT NEW WELLSSJRWMD MANDATED THAT NEW WELLS SJRWMD MANDATED THAT NEW WELLS SJRWMD MANDATED THAT NEW WELLS WERE “AGRICULTURAL IRRIGATION USE WERE “AGRICULTURAL IRRIGATION USE ONLY”ONLY”

REPLACEMENT WELL PROGRAM

CONSTRUCTION GUIDELINESCONSTRUCTION GUIDELINES “Telescoped” Casing Construction “Telescoped” Casing Construction

MethodologyMethodologygygy Surface Casing Surface Casing -- 1212--inch Diameter Steel to inch Diameter Steel to

4040--80 Feet Below Land Surface (BLS)80 Feet Below Land Surface (BLS)

REPLACEMENT WELL PROGRAM

Secondary Casing Secondary Casing -- 88--inch Diameter Steel inch Diameter Steel From 100From 100--140 Feet BLS140 Feet BLS

Tertiary CasingTertiary Casing -- 44--inch Diameter PVC toinch Diameter PVC to Tertiary Casing Tertiary Casing 44 inch Diameter PVC to inch Diameter PVC to 180180--210 Feet BLS210 Feet BLS

Drilled Out For 30Drilled Out For 30--Foot Open Hole Foot Open Hole Interval in the Floridan Aquifer Interval in the Floridan Aquifer

Five to Eight Day Process, Per Well, Five to Eight Day Process, Per Well, Dependent Upon Many FactorsDependent Upon Many Factors

8

DRILL RIG IN OPERATION REPLACEMENT WELL SAMPLING

WELLS SAMPLED FOR EPA TARGET LISTWELLS SAMPLED FOR EPA TARGET LIST FLORIDAN AQUIFER CONTAMINATION FLORIDAN AQUIFER CONTAMINATION

MONITORED THROUGH RESULTSMONITORED THROUGH RESULTSMONITORED THROUGH RESULTSMONITORED THROUGH RESULTS

REPLACEMENT WELL COMPLETION

EACH WELL WAS VIDEO LOGGED WITH THE EACH WELL WAS VIDEO LOGGED WITH THE STATE OF THE ART FDOT LOGGING VEHICLESTATE OF THE ART FDOT LOGGING VEHICLE

THE CUSTODY OF EACH WELL WAS THE CUSTODY OF EACH WELL WAS TRANSFERRED TO THE HOMEOWNER VIA THE TRANSFERRED TO THE HOMEOWNER VIA THE “RELEASE OF LIABILITY FORM”“RELEASE OF LIABILITY FORM”

COMPLETED WELL SETUP

COMPLETED WELL SETUP SUMMARY OF RESULTS

344 SIGNED PERMISSIONS344 SIGNED PERMISSIONS 333 WELLS LOGGED333 WELLS LOGGED 250+ WELLS SAMPLED250+ WELLS SAMPLED 181 WELLS ABANDONED181 WELLS ABANDONED 121 NEW WELLS INSTALLED AND SAMPLED121 NEW WELLS INSTALLED AND SAMPLED 6 OLD HOME WELLS LEFT FOR MONITORING 6 OLD HOME WELLS LEFT FOR MONITORING

PURPOSESPURPOSES

9

HOMEWELL LOCATION MAP

HATCHET CREEK

FLOOD PLAIN LIMIT


KNOWN DOMESTIC WELL LOCATION (TYPICAL)

SITE

N.E

. 39t

h S

T

REPLACEMENT WELL LOCATION MAP

HATCHET CREEK

FLOOD PLAIN LIMIT


REPLACEMENT WELL LOCATION (TYPICAL)

SITE

N.E

. 39t

h S

T

Groundwater Remediation

ProgramProgram

FOUR CONTAMINATED AQUIFERS

Surficial (0 to 60 Feet Deep)Surficial (0 to 60 Feet Deep) H1 (90 to 120 Feet Deep)H1 (90 to 120 Feet Deep) H2 (170 to 190 Feet Deep)H2 (170 to 190 Feet Deep) H2 (170 to 190 Feet Deep)H2 (170 to 190 Feet Deep) Floridan (200+ Feet Deep)Floridan (200+ Feet Deep)

AQUIFER PROFILE

150’

175’

100’

SURFICIAL AQUIFER

UPPER HAWTHORN

BURIED DRUMS

FAIRBANKS DISPOSAL PIT HATCHET

CREEK

WELLS

50’

0’

-50’

SEMI-CONFINING UNIT

UPPER INTERMEDIATE

AQUIFER

LOWER HAWTHORN

CONFINING UNIT

HAWTHORN BASAL CLAYFLORIDAN AQUIFER

OCALA GROUP

SURFICIAL AQUIFER CONTAMINATION

About 70 Acres North of Pit to Hatchet About 70 Acres North of Pit to Hatchet CreekCreek

Fairly tight sedimentary deposits withFairly tight sedimentary deposits with Fairly tight sedimentary deposits with Fairly tight sedimentary deposits with karst featureskarst features

No contamination identified below 35 feetNo contamination identified below 35 feet 261 ppb 1,1261 ppb 1,1--DCE and 241 ppb TCEDCE and 241 ppb TCE

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SURFICIAL AQUIFER REMEDIATION

400+ Vertical Recovery Wells400+ Vertical Recovery Wells 600+ Air Sparging and VES Wells600+ Air Sparging and VES Wells Horizontal Recovery TrenchesHorizontal Recovery Trenches Horizontal Recovery TrenchesHorizontal Recovery Trenches

SURFICIAL AQUIFER REMEDIATION

14 Trenches, Each 300 Feet Long14 Trenches, Each 300 Feet Long 26 Feet Below Water Table26 Feet Below Water Table One Pass InstallationOne Pass Installation One Pass InstallationOne Pass Installation 4 Air Stripping Towers4 Air Stripping Towers NPDES Discharge to PondNPDES Discharge to Pond

SURFICIAL 1,1-DCE PLUME vs TRENCH LOCATIONS

HATCHET CREEK

1.28 ppb 1 1 DCE

TYPICAL RECOVERY TRENCH

7 ppb 1,1 DCE

1,1 DCE

SITE

RECOVERY TRENCH DETAIL

11

H1 AQUIFER CONTAMINATION

0.5 Miles North to 1.5 Miles Southwest of 0.5 Miles North to 1.5 Miles Southwest of PitPit

Confined Limerock AquiferConfined Limerock Aquifer Confined Limerock AquiferConfined Limerock Aquifer 96 ppb 1,196 ppb 1,1--DCE and 13 ppb TCEDCE and 13 ppb TCE

H1 AQUIFER REMEDIATION

2 Vertical Recovery Wells2 Vertical Recovery Wells Air Stripping TowersAir Stripping Towers 4 Injection Wells4 Injection Wells 4 Injection Wells4 Injection Wells One injection Well Converted to Recovery One injection Well Converted to Recovery

WellWell

H1 1,1-DCE PLUME vs. H1 RECOVERY WELL LOCATIONS

H1RW-1

H1RW-3

H1RW-2

HW-34

SITE

>1.28 ppb 1,1-DCE

>7 ppb 1,1-DCE

H2 AQUIFER CONTAMINATION

Hatchet Creek to 1,000 Feet South of Pit Hatchet Creek to 1,000 Feet South of Pit and Isolated Area to Eastand Isolated Area to East

Confined Limerock AquiferConfined Limerock Aquifer Confined Limerock AquiferConfined Limerock Aquifer 68 ppb 1,168 ppb 1,1--DCEDCE Point Source ContaminationPoint Source Contamination

H2 AQUIFER REMEDIATION

4 Vertical Recovery Wells4 Vertical Recovery Wells 2 Cleaned By Pump Tests2 Cleaned By Pump Tests Air Stripping TowersAir Stripping Towers Air Stripping TowersAir Stripping Towers Injection WellsInjection Wells

12

H2 1,1-DCE PLUME vs. H2 RECOVERY WELL LOCATIONS

H2RW-4

SITE

>7 ppb 1,1-DCE

>15 ppb 1,1-DCE

>20 ppb 1,1-DCE

H2RW-3

H2RW-2 H2RW-1

FLORIDAN AQUIFER CONTAMINATION

Point Sources 1 to 1.5 miles East and Point Sources 1 to 1.5 miles East and South of PitSouth of Pit

Confined Limerock AquiferConfined Limerock Aquifer Confined Limerock AquiferConfined Limerock Aquifer Primary Drinking Water SourcePrimary Drinking Water Source 42 ppb 1,142 ppb 1,1--DCE and 5 ppb TCEDCE and 5 ppb TCE

FLORIDAN AQUIFER REMEDIATION

3 Vertical Recovery Wells3 Vertical Recovery Wells 3 Air Stripping Towers3 Air Stripping Towers 6 Floridan Injection Wells6 Floridan Injection Wells 6 Floridan Injection Wells6 Floridan Injection Wells

FLORIDAN 1,1-DCE PLUME vs. FLORIDAN RECOVERY WELL

LOCATIONS

SITE

>40 ppb 1,1-

>1 ppb 1,1-DCE

>7 ppb 1,1-DCE

>10 ppb 1,1-DCE DCE

>10 ppb 1,1-DCE

>7 ppb 1,1-DCE

FL-32FL-74

FLRW-3

FLRW-2FLRW-1

Fairbanks Disposal Pit

Groundwater Treatment ProgressGroundwater Treatment Progress

FLORIDAN AQUIFER

TREATMENT BEGAN: JUNE 18, 1996TREATMENT BEGAN: JUNE 18, 1996 VOLUME OF WATER TREATED AS OF 7VOLUME OF WATER TREATED AS OF 7--3131--00: 00:

255.13 MILLION GALLONS255.13 MILLION GALLONS ALL DESIGNATED MONITOR WELLS BELOW ALL DESIGNATED MONITOR WELLS BELOW

GROUNDWATER PROTECTION STANDARDSGROUNDWATER PROTECTION STANDARDS ALL ORIGINAL RECOVERY WELLS BELOW ALL ORIGINAL RECOVERY WELLS BELOW

GROUNDWATER PROTECTION STANDARDSGROUNDWATER PROTECTION STANDARDS REPLACEMENT WELL RPREPLACEMENT WELL RP--117 AND RP117 AND RP--164A 164A

PERIODICALLY USED AS RECOVERY WELLS, AS PERIODICALLY USED AS RECOVERY WELLS, AS NECESSARYNECESSARY

13

FLORIDAN AQUIFER

TREATMENT SYSTEM T10 ABANDONED AND TREATMENT SYSTEM T10 ABANDONED AND PROPERTY TRANSFERRED TO HOMEOWNERPROPERTY TRANSFERRED TO HOMEOWNER

48 MONITOR WELLS ABANDONED IN 48 MONITOR WELLS ABANDONED IN CONJUNCTION WITH T10CONJUNCTION WITH T10

TREATMENT SYSTEM T9 ABANDONED THE TREATMENT SYSTEM T9 ABANDONED THE FOLLOWING FISCAL YEARFOLLOWING FISCAL YEAR

FLORIDAN AQUIFERFLORIDAN AQUIFER1,1 DCE CONCENTRATION OUTLINE 1,1 DCE CONCENTRATION OUTLINE

PREPRE--PUMPING PUMPING -- DECEMBER 1995DECEMBER 1995

N.E. 77TH AVE.

HATCHET CREEK

FL-16

N

FLRW-3FLRW-2

FLRW-1RP-164A

RP-117

7 ug/L

7 ug/L

7 ug/L

N.E

. 39T

H S

TR

EE

T

FL 16

LEGEND

FLORIDAN RECOVERY WELL LOCATION

FLORIDAN MONITOR WELL LOCATION

NOT TO SCALE

FL-74

FL-32

FLORIDAN AQUIFERFLORIDAN AQUIFER1,1 DCE CONCENTRATION 1,1 DCE CONCENTRATION

SEPTEMBER 1998 (All levels below GPS)SEPTEMBER 1998 (All levels below GPS)

N.E. 77TH AVE.

HATCHET CREEK

FL-16

N

FLRW-3FLRW-2

FLRW-1RP-164A

RP-117

N.E

. 39T

H S

TR

EE

T

FL-74

FL-32

FL 16

LEGEND

FLORIDAN RECOVERY WELL LOCATION

FLORIDAN MONITOR WELL LOCATION

NOT TO SCALE

H2 AQUIFER

TREATMENT BEGAN: FEBRUARY 1, 1996TREATMENT BEGAN: FEBRUARY 1, 1996 VOLUME OF WATER TREATED AS OF 7VOLUME OF WATER TREATED AS OF 7--3131--00: 00:

41.17 MILLION GALLONS41.17 MILLION GALLONS ALL DESIGNATED MONITOR WELLS BELOW ALL DESIGNATED MONITOR WELLS BELOW

GROUNDWATER PROTECTION STANDARDSGROUNDWATER PROTECTION STANDARDS H2RWH2RW--1 STILL ABOVE GPS (1,11 STILL ABOVE GPS (1,1--DCE DCE

APPROXIMATELY 15 PPB)APPROXIMATELY 15 PPB)

H2 AQUIFERH2 AQUIFER1,1 DCE CONCENTRATION OUTLINE 1,1 DCE CONCENTRATION OUTLINE

PREPRE--PUMPING PUMPING -- DECEMBER 1995DECEMBER 1995

H2RW-4

N

H2RW-1

H2-11

7 ug/L

7 ug/L

LEGEND

H2 RECOVERY WELL LOCATION

NOT TO SCALE

N.E. 77TH AVE.

LEGEND


NOT TO SCALE


DECEMBER 1996DECEMBER 1996

H2RW-4

N

H2RW-1

H2-11

7 ug/L

N.E. 77TH AVE.

LEGEND


NOT TO SCALE

14


SEPTEMBER 1997SEPTEMBER 1997

H2RW-4

N

H2RW-1

H2-11

7 ug/L

LEGEND


NOT TO SCALE

N.E. 77TH AVE.

LEGEND


NOT TO SCALE


SEPTEMBER 1998 DATA ALL BELOW GPSSEPTEMBER 1998 DATA ALL BELOW GPS

H2RW-4

N

H2RW-1

H2-11

LEGEND


NOT TO SCALE

N.E. 77TH AVE.

LEGEND


NOT TO SCALE

H1 AQUIFER

TREATMENT BEGAN: FEBRUARY 1, 1996TREATMENT BEGAN: FEBRUARY 1, 1996 VOLUME OF WATER TREATED AS OF 7VOLUME OF WATER TREATED AS OF 7--3131--00: 00:

432.10 MILLION GALLONS432.10 MILLION GALLONS SIGNIFICANT REDUCTION OF PLUMESIGNIFICANT REDUCTION OF PLUME CONTAMINATION PLUME CONTAINED TO FDOT CONTAMINATION PLUME CONTAINED TO FDOT

PROPERTY AND IMMEDIATE VICINITY, PLUS PROPERTY AND IMMEDIATE VICINITY, PLUS ISOLATED POCKETS SURROUNDING H1ISOLATED POCKETS SURROUNDING H1--53 AND 53 AND H1H1--5555

H1H1--2, H12, H1--46, AND HW46, AND HW--34 CONVERTED TO 34 CONVERTED TO TEMPORARY RECOVERY WELLS TEMPORARY RECOVERY WELLS

H1 AQUIFER

DYE TRACE STUDIES (STATIC AND DYNAMIC) DYE TRACE STUDIES (STATIC AND DYNAMIC) COMPLETEDCOMPLETED

INJECTION WELLS NORTH OF HATCHET CREEK INJECTION WELLS NORTH OF HATCHET CREEK WILL NOT BE USEDWILL NOT BE USED

PUMP TESTS COMPLETED ON H1PUMP TESTS COMPLETED ON H1--3 AND H13 AND H1--4646 HYDRAULIC CHARACTERISTICS CONSISTENT HYDRAULIC CHARACTERISTICS CONSISTENT

WITH PREVIOUS RESULTSWITH PREVIOUS RESULTS H1H1--46 CONVERTED TO RECOVERY WELL46 CONVERTED TO RECOVERY WELL

H1RW-1

H1-2H1-15

H1-21

N

H1RW-2

H1RW-3

H1 AQUIFER H1 AQUIFER 1,1 DCE CONCENTRATION OUTLINE 1,1 DCE CONCENTRATION OUTLINE PREPRE--PUMPING PUMPING -- DECEMBER 1995DECEMBER 1995

ug/L7

HW-34

H1-16

H1-55

N.E. 77TH AVE.

H1-41

LEGEND

H1 RECOVERY WELL LOCATIONH1 MONITOR WELL LOCATION

NOT TO SCALE

ug/L7

H1 AQUIFER H1 AQUIFER 1,1 DCE CONCENTRATION OUTLINE 1,1 DCE CONCENTRATION OUTLINE

DECEMBER 1996DECEMBER 1996

H1RW-1

H1-2H1-15

H1-21

N

H1RW-2H1RW-3

7 ug/L

HW-34

H1-16

H1-55

N.E. 77TH AVE.

H1-41

LEGEND


NOT TO SCALE

7 ug/L

15

H1 AQUIFER H1 AQUIFER 1,1 DCE CONCENTRATION OUTLINE 1,1 DCE CONCENTRATION OUTLINE

SEPTEMBER 1997SEPTEMBER 1997

H1RW-1

H1-2H1-15

H1-21

N

H1RW-2

H1RW-3

7 ug/L

HW-34

H1-16

H1-55

N.E. 77TH AVE.

H1-41

LEGEND


NOT TO SCALE

7 ug/L

H1-15

H1 AQUIFERH1 AQUIFER1,1 DCE CONCENTRATION OUTLINE1,1 DCE CONCENTRATION OUTLINE

MARCH 2000MARCH 2000

H1RW-1

H1-21

N

H1RW-2

H1RW-3

MARCH 2000

H1-2

HW-34

H1-16

H1-55

N.E. 77TH AVE.

H1-41

LEGEND


NOT TO SCALE

MARCH 2000

SURFICIAL AQUIFER

TREATMENT BEGAN: DECEMBER 8, 1995TREATMENT BEGAN: DECEMBER 8, 1995 VOLUME OF WATER TREATED AS OF 7VOLUME OF WATER TREATED AS OF 7--3131--00: 00:

342.69 MILLION GALLONS342.69 MILLION GALLONS SURFICIAL CONTAMINATION CONTAINED SURFICIAL CONTAMINATION CONTAINED

ENTIRELY WITHIN FDOT PROPERTY BOUNDARYENTIRELY WITHIN FDOT PROPERTY BOUNDARY ONLY TWO PERMITONLY TWO PERMIT--DESIGNATED WELLS (OUT DESIGNATED WELLS (OUT

OF 10) ABOVE GROUNDWATER PROTECTION OF 10) ABOVE GROUNDWATER PROTECTION STANDARDSSTANDARDS

SURFICIAL RECOVERY WELL DATA VS. SURFICIAL RECOVERY WELL DATA VS. CONCENTRATION PLOTSCONCENTRATION PLOTS

SURFICIAL SYSTEMSURFICIAL SYSTEM

TYPICAL RECOVERY

TYPICAL INJECTION WELL

EFFLUENT TO INJECTION WELLSCREEK

RECOVERY WELL

TYPICAL TREATMENT SYSTEM

HORIZONTAL TRENCH

EFFLUENT TO PONDEFFLUENT

TO PONDSSITE

SRW-4 TCE Concentration vs. Time

0

3

6

9

12

15

2/6/

96

3/13

/96

4/17

/96

5/21

/96

7/1/

96

8/7/

96

9/18

/96

10/2

2/96

11/2

5/96

12/3

0/96

2/3/

97

3/10

/97

4/14

/97

5/28

/97

9/15

/97

11/2

4/97

12/3

0/97

2/4/

98

5/4/

98

8/3/

98

10/5

/98

12/2

2/98

3/15

/99

Date

Co

nce

ntr

ati

on

(p

pb

)

GPS = 3 ppb


0

6

12

18

24

30

2/6/

96

3/13

/96

4/17

/96

6/5/

96

7/10

/96

8/13

/96

9/24

/96

11/5

/96

12/1

0/96

1/14

/97

3/10

/98

7/21

/97

8/25

/97

10/2

1/97

12/1

/97

1/5/

98

2/17

/98

5/18

/98

9/8/

98

11/1

6/98

3/2/

99

Date

Co

nce

ntr

ati

on

(p

pb

)

GPS = 3 ppb


0

3

6

9

12

15

2/6/

96

3/6/

96

4/3/

96

5/14

/96

6/18

/96

7/18

/96

8/13

/96

9/18

/96

10/1

5/96

11/1

2/96

12/1

0/96

1/7/

97

3/3/

97

3/31

/97

4/29

/97

10/2

8/97

11/2

4/97

12/2

2/97

1/20

/98

3/2/

98

6/15

/98

9/22

/98

12/2

2/98

3/15

/99

Date

Co

nce

ntr

ati

on

(p

pb

)

GPS = 3 ppb

GEOPROBE ACTIVITIES

TREATMENT SYSTEM DATA EVALUATION TREATMENT SYSTEM DATA EVALUATION INDICATED LIKLIHOOD OF UNIDENTIFIED INDICATED LIKLIHOOD OF UNIDENTIFIED SOURCESSOURCES

FIRST SAMPLES FROM TOP OF WATER TABLE FIRST SAMPLES FROM TOP OF WATER TABLE --CLEANCLEAN

SECOND SAMPLES FROM 25 TO 29 FEET BLS SECOND SAMPLES FROM 25 TO 29 FEET BLS --PRIMARILY CLEANPRIMARILY CLEAN

SAMPLES FROM TOP OF CLAY (34 TO 39 FEET SAMPLES FROM TOP OF CLAY (34 TO 39 FEET BLS) BLS) -- POSSIBLE DNAPLPOSSIBLE DNAPL

16

GEOPROBE ACTIVITIES

OVER 650 GEOPROBE BORINGS TO COLLECT OVER 650 GEOPROBE BORINGS TO COLLECT GROUNDWATER SAMPLESGROUNDWATER SAMPLES

41 CONE PENETROMETER (CPT)/MEMBRANE 41 CONE PENETROMETER (CPT)/MEMBRANE INTERFACE PROBE (MIP) BORINGSINTERFACE PROBE (MIP) BORINGS

7 UW BORINGS FOR DETAILED VERTICAL 7 UW BORINGS FOR DETAILED VERTICAL LITHOLOGIC AND ANALYTICAL PROFILE IN LITHOLOGIC AND ANALYTICAL PROFILE IN SOURCE AREASSOURCE AREAS

3 ROTOSONIC WELLS3 ROTOSONIC WELLS WATERLOO SAMPLER FOR DETAILED VERTICAL WATERLOO SAMPLER FOR DETAILED VERTICAL

GROUNDWATER PROFILEGROUNDWATER PROFILE

WHAT DO WE DO NOW?WHAT DO WE DO NOW?

Technology EvaluationTechnology Evaluation-- Insitu Chemical OxidationInsitu Chemical Oxidation-- Insitu Thermal Insitu Thermal

-- ExcavationExcavation--Excavation with SheetpileExcavation with Sheetpile--Open hole ExcavationOpen hole Excavation

Pilot Study Evaluation

Evaluated InEvaluated In--Situ Oxidation and InSitu Oxidation and In--Situ Situ Thermal Technologies for Pilot TestingThermal Technologies for Pilot Testing 70 foot by 70 foot area in potential source70 foot by 70 foot area in potential source70 foot by 70 foot area in potential source 70 foot by 70 foot area in potential source

areaarea Approximately 40 feet deepApproximately 40 feet deep


InIn--Situ OxidationSitu Oxidation Fenton’s ProcessFenton’s Process

GeoCleanseGeoCleanseGeoCleanseGeoCleanseMantechMantech IsoTecIsoTecOxyOxy--CatCat


Bid Results: InBid Results: In--Situ OxidationSitu Oxidation Bids ranged from $150K to $300K for pilot Bids ranged from $150K to $300K for pilot

studystudyyy GeoCleanse declined to bid citing buffering GeoCleanse declined to bid citing buffering

capability of site soilscapability of site soils

17


InIn--Situ Thermal TechnologySitu Thermal Technology SixSix--Phase HeatingPhase Heating

Current Environmental Systems, Inc.Current Environmental Systems, Inc.Current Environmental Systems, Inc.Current Environmental Systems, Inc.


Bid Results: InBid Results: In--Situ Thermal HeatingSitu Thermal Heating Approximately $600K for pilot study ($65/yd.)Approximately $600K for pilot study ($65/yd.) Differs significantly from commonly publishedDiffers significantly from commonly published Differs significantly from commonly published Differs significantly from commonly published

results ($32/yd.)results ($32/yd.)

Remedial ApproachRemedial Approach

Work Plan Development under PerformanceWork Plan Development under Performance--Based permitBased permit-- Excavate to UTS or Residential Excavate to UTS or Residential

Standards (whichever is more stringent)Standards (whichever is more stringent)Standards (whichever is more stringent)Standards (whichever is more stringent)-- On site treatment of excavated soilsOn site treatment of excavated soils-- Cleanup excavated soils to State Cleanup excavated soils to State

Leachability goalsLeachability goals

Excavation Activities Excavation Activities --Overburden, 0 to 20 ft Overburden, 0 to 20 ft Overburden Removal Overburden Removal

Began Overburden Removal October 2001 Began Overburden Removal October 2001 and completed December 2001.and completed December 2001.

DewateringDewatering -- Horizontal Trench InstalledHorizontal Trench Installed Dewatering Dewatering -- Horizontal Trench InstalledHorizontal Trench Installed Dewatering Activities began January 21, Dewatering Activities began January 21,

20022002

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Excavation Activities Excavation Activities -- 20 to 30 20 to 30 feet BLSfeet BLS

Excavation of Soils below water table (20Excavation of Soils below water table (20--30 feet below land surface)30 feet below land surface)-- Initiated January 2002Initiated January 2002yy-- Interceptor Trench CutInterceptor Trench Cut

to Aid in Dewatering Activitiesto Aid in Dewatering Activities

Excavation ActivitiesExcavation Activities

Excavation ActivitiesExcavation Activities Observation of DNAPLObservation of DNAPL

DNAPL DNAPL encountered at encountered at approximately 34 approximately 34 feet below landfeet below landfeet below land feet below land surfacesurface

Observation of DNAPLObservation of DNAPL

DNAPL at ~34 feet DNAPL at ~34 feet below land surfacebelow land surface

Observation of DNAPLObservation of DNAPL

DNAPL in sand DNAPL in sand stringer at stringer at approximately 37 feet approximately 37 feet blblbls.bls.

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DNAPL SAMPLEDNAPL SAMPLE

DNAPL separated into DNAPL separated into LNAPL and DNAPLLNAPL and DNAPL

EXEX--SITU SOIL VAPOR SITU SOIL VAPOR EXTRACTION PLANEXTRACTION PLAN

Rotary Trommel To Remove Debris And Rotary Trommel To Remove Debris And Regulate Particle SizeRegulate Particle Size

Sample Soils Sample Soils -- Clean Stockpile Or SVEClean Stockpile Or SVELi d P d I SWMU/WMALi d P d I SWMU/WMA Lined Pond In SWMU/WMALined Pond In SWMU/WMA

Addition of 5% Quick Lime If Needed To Addition of 5% Quick Lime If Needed To Improve Material Handling Of ClaysImprove Material Handling Of Clays

Treat To Florida Leachability SCTLs (Chapter Treat To Florida Leachability SCTLs (Chapter 6262--777, FAC)777, FAC)

Lined Pond(Soil Treatment Area)

SRW-1 SRW-2

ApproximateL ti f

ApproximateLocation of

Source Area 2

DewateringTreatment System

Soil Processing Area

FDOT Office

ApproximateLocation of

Source Area 3

Location ofSource Area 1

= Approximate location of apparent source material encountered during excavation activities.

WORK PLAN IMPLEMENTATIONWORK PLAN IMPLEMENTATION

Increasing Clay Content Clogged TrommelIncreasing Clay Content Clogged Trommel Added 5% Hydrated Lime Due To Health Added 5% Hydrated Lime Due To Health

And Safety ConcernsAnd Safety Concerns -- Minimal EffectMinimal EffectAnd Safety Concerns And Safety Concerns Minimal EffectMinimal Effect Added 5% Quick Lime Added 5% Quick Lime -- SuccessSuccess Clayey Soils Became Friable And NonClayey Soils Became Friable And Non--PlasticPlastic All Soil Concentrations Below Leachability All Soil Concentrations Below Leachability

SCTLsSCTLs Most Below Detection Limit Of 1 Most Below Detection Limit Of 1 g/kgg/kg Leachate Tests Below Detection LimitsLeachate Tests Below Detection Limits

20

QUICK LIME (CALCIUM OXIDE)QUICK LIME (CALCIUM OXIDE)

CaO + Water CaO + Water Ca(OH)Ca(OH)22 + Heat+ Heat Calcium Reacts with Metals in Clay StructureCalcium Reacts with Metals in Clay Structure Very Plastic Clays (Plasticity Index GreaterVery Plastic Clays (Plasticity Index Greater Very Plastic Clays (Plasticity Index Greater Very Plastic Clays (Plasticity Index Greater

Than 50) Rendered NonThan 50) Rendered Non--PlasticPlastic Moisture Sensitivity Substantially ReducedMoisture Sensitivity Substantially Reduced Swell Potential Reduced From 8% To 10% Swell Potential Reduced From 8% To 10%

To Less Than 0.1%To Less Than 0.1%

WORKING WITH QUICK LIMEWORKING WITH QUICK LIME

Highly Exothermic Reaction With All Moisture Highly Exothermic Reaction With All Moisture -- Eyes, Lungs, Sweat, Etc.Eyes, Lungs, Sweat, Etc.

Reacts With Some OrganicsReacts With Some Organics -- Rubber HosesRubber Hoses Reacts With Some Organics Reacts With Some Organics Rubber Hoses Rubber Hoses On EquipmentOn Equipment

Appropriate PPE And Dust Control EssentialAppropriate PPE And Dust Control Essential FDA Approved Food AdditiveFDA Approved Food Additive $200 per 2,000 Pound Supersack$200 per 2,000 Pound Supersack

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FINAL RESULTS AT FAIRBANKSFINAL RESULTS AT FAIRBANKS All Contaminated Soils Mixed With Quick All Contaminated Soils Mixed With Quick

LimeLime 18 Inch Lifts Using Large Road Mixer In 18 Inch Lifts Using Large Road Mixer In

Lined Soil Processing AreaLined Soil Processing Areagg Additional Quick Lime Mixing InAdditional Quick Lime Mixing In--Situ With Situ With

Back Hoe In DNAPL AreasBack Hoe In DNAPL Areas 11,500 Cubic Yards of Contaminated Soils 11,500 Cubic Yards of Contaminated Soils

Successfully Treated With Quick LimeSuccessfully Treated With Quick Lime Treated Soils Returned To ExcavationTreated Soils Returned To Excavation Unit Treatment Cost Less Than $30 Per Cubic Unit Treatment Cost Less Than $30 Per Cubic

YardYard

Confirmation SamplingConfirmation Sampling

Confirmation Sample CollectionConfirmation Sample Collection--Collected confirmation samples on10Collected confirmation samples on10--foot foot centers across excavation floorcenters across excavation floor

Any results above leachability goals triggered Any results above leachability goals triggered rere--excavationexcavation

Excavation activities completed March 2002Excavation activities completed March 2002

Fairbanks Disposal Pit After Fairbanks Disposal Pit After 2002 Excavation2002 Excavation

SURFICIAL SYSTEMSURFICIAL SYSTEM

TYPICAL RECOVERY

TYPICAL INJECTION WELL

EFFLUENT TO INJECTION WELLSCREEK

RECOVERY WELL

TYPICAL TREATMENT SYSTEM

HORIZONTAL TRENCH

EFFLUENT TO PONDEFFLUENT

TO PONDSSITE

Recovery Well Trend AnalysisRecovery Well Trend Analysis

SRW-2 1,1,1-TCA Concentrations vs. Time

(2001-Present)

400pp

b)

Source Removal Complete

0

100

200

300

1/8/

01

2/5/01

D

4/9/01

6/5/01

8/1/

01

10/2/0

1

12/5

/01

1/8/02

D

3/1/

02

5/6/02

7/8/02

Date

Co

ncen

tratio

n (p

MCL=200 ppb

22


SRW-2 1,1-DCE Concentration vs Time

(2001-Present)

300pp

b)


050

1001502002503

1/8/01

2/5/

01D

4/9/

01

6/5/

01

8/1/

01

10/2

/01

12/5

/01

1/8/

02D

3/1/

02

5/6/

02

7/8/

02

Date

Co

nce

ntr

atio

n (p

MCL=7 ppb


SRW-2 TCE Concentrations vs Time

(2001-Present)

100

pp

b)


0

20

40

60

80

1/8/01

2/5/

01D

4/9/

01

6/5/01

8/1/01

10/2/0

1

12/5

/01

1/8/

02D

3/1/

02

5/6/02

7/8/02

Date

Co

nce

ntr

atio

n (p

MCL=3 ppb

Excavation ConclusionsExcavation Conclusions

Excavation facilitated the ability to “chase” Excavation facilitated the ability to “chase” stringers and isolated areas of contaminationstringers and isolated areas of contamination

DNAPL found in sand stringers would have been DNAPL found in sand stringers would have been virtually impossible to address with othervirtually impossible to address with othervirtually impossible to address with other virtually impossible to address with other technologiestechnologies

With source materials removed, dissolved phase With source materials removed, dissolved phase contamination is expected to continue to contamination is expected to continue to decrease with timedecrease with time

Additional Investigation Additional Investigation ActivitiesActivities

3D Seismic Study3D Seismic Study Ground Penetrating Radar/ Spontaneous Ground Penetrating Radar/ Spontaneous

PotentialPotentialDi t P h T h l I ti tiDi t P h T h l I ti ti Direct Push Technology InvestigationDirect Push Technology Investigation

Dye Trace StudyDye Trace Study Passive Diffusion BagsPassive Diffusion Bags


Seismic StudySeismic Study-- Purpose Purpose -- map possible contaminant map possible contaminant preferential pathwayspreferential pathwaysp p yp p y-- 5,500 linear feet, 6 high5,500 linear feet, 6 high--resolution shear resolution shear wave reflection lineswave reflection lines

23


GPR/SP SurveyGPR/SP Survey-- Purpose Purpose

1) determine location and severity of 1) determine location and severity of ) y) ypossible sinkhole featurespossible sinkhole features

2) determine possibility of relic sinkholes 2) determine possibility of relic sinkholes contributing to vertical migrationcontributing to vertical migration

3) compare results with 1994 D&M 3) compare results with 1994 D&M natural potential surveynatural potential survey

Current StatusCurrent Status

Cost Cap InsuranceCost Cap Insurance 10 Year Policy10 Year Policy Single FDOT PaymentSingle FDOT Payment Single FDOT PaymentSingle FDOT Payment Another Consultant Won Project in midAnother Consultant Won Project in mid--

20032003

THANK YOUTHANK YOU

Wm. Gordon Dean, PEWm. Gordon Dean, PEWRS Infrastructure & WRS Infrastructure &

Environment, Inc.Environment, Inc.1650 Summit Lake Drive1650 Summit Lake Drive

Suite 202Suite 202Tallahassee, FL 32317Tallahassee, FL 32317

(850) 531(850) [email protected]@wrsie.com

fairbanks disposal acknowledgments pit - soil and water...

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