Minutes of the 1/29/2013 Central and Camelback CAB meeting Page 1 of 2

Meeting Minutes

Central and Camelback Water Quality Assurance Revolving Fund (WQARF) Site Community Advisory Board (CAB) Meeting

Tuesday January 29, 2013

6:00 p.m.-8:00 p.m. Arizona Department of Environmental Quality, Room 145

1110 W. Washington, Phoenix

DRAFT MINUTES Ref: RPU #13-274 CAB members present: Peter Zorbas, Pam Perry, Stan Watts, Paul Barquinero, Lynn Morrow, and Jean Schroeder CAB members absent: Frank Mendola ADEQ staff in attendance: Kevin Snyder, Project Manager; Wendy Flood, Community Involvement Coordinator; and Andre Chiaradia Members of the public present: The following matters were discussed, considered, or decided at the meeting: 1. Welcome and Introductions

Mr. Watts welcomed all attendees.

2. Acceptance or Changes to October 18, 2010 meeting minutes Ms. Perry moved to accept the minutes as written. It was seconded by Mr. Zorbas and passed

unanimously by the CAB. 3. Site Activities since October 2010 including Remedial Activities, Permitting, Site Investigation and

Budget - Kevin Snyder, Project Manager Mr. Kevin Snyder went over the current map for the site noting the change in plume size, smaller

southern plume and a separate plume up north. See Presentation Below

Mr. Snyder covered the groundwater and soil vapor extraction systems and updates, well sampling, permits and reports, events since last meeting October 2010, amount of water treated and sampling trends, water flow and maintenance activities for soil and groundwater systems.

Mr. Snyder let the CAB know that the soil vapor system now runs full time and is doing a better job then the pulsing of on and off. There have been more carbon changes out since the system is pulling more contaminates; there was also a new well installed that has helped. Mr.

Minutes of the 1/29/2013 Central and Camelback CAB meeting Page 2 of 2

Snyder further explained that a soil gas survey was done to identify potential source/spill areas. He also showed an example of a passive soil gas sampler. Vapor and soil samples were collected and a nested soil vapor well was installed at the southwest corner of the building which has shown positive results. Mr. Snyder ended his presentation covering future activities.

Ms. Schroder asked about the filling station and Mr. Snyder stated that work was performed by the former station operators regarding the station and clean-up on the corner.

Mr. Watts inquired about the schedule for sampling and drilling. Mr Snyder stated it would be within the next few months, late spring hopefully. Well drilling information will be handed out in the neighborhood.

Mr. Watts also asked for some information to give out at the annual HOA meeting. Ms. Flood stated she would follow up to get him the information. The CAB discussed attendance and the role of the group at HOA and other community events.

4. Discussion Regarding Merging with 7th Ave and Bethany Home CAB – Mr. Watts stated this CAB is in close proximately to the current CAB and many members of the CAB serve on that board as well. Discussion was held among the members if they should merge into one CAB. The CAB agreed that they would be open to merging with the 7th Ave CAB if they want to as well. Ms. Flood will follow up with CAB members on the next steps and where the meetings will be. 5. *Call to the public None 6. Next Meeting Date and Agenda Discussion A meeting will be scheduled once the 7th Ave and Bethany CAB decide they want to merge. Also, if there are milestone site events then a meeting will be tentatively scheduled for June 17, 2013 at 6:00 pm. Agenda topics will included the Windsor HOA meeting, an outreach report from CAB members and a site update from ADEQ. Ms. Perry thanked Mr. Snyder for the quick response to cover the tagging at the compound. 7. Adjournment

Ms. Schroeder moved to adjourn. It was seconded by Mr. Watts.

Central and Camelback Central and Camelback WQARF SiteWQARF Site

Wendy Flood, Community Involvement Coordinator

January 29, 2013 6:00pm

Andre Chiaradia, Unit Manager

Kevin Snyder, Project Manager

DW-N2 DW-N1

DW-W3

DW-W2

DW-W1 DW-S2 DW-S1DW-E3

DW-E2

DW-E1

One East Camelback Extraction Well

WQARF Boundary

Area of PCE Greater Than 5 ug/L

Events Since October 2010 CAB Meeting

• The groundwater remediation and treatment system was started February 2003. To this point the groundwater remediation and treatment system has removed 284.4 lbs of PCE from groundwater

• The soil vapor extraction (SVE) system was started November 2007. To this point the soil vapor extraction (SVE) system has removed 4,460 lbs of PCE from soil

Events Since October 2010 CAB Meeting

• Groundwater samples were collected from monitor wells during the first, second and fourth quarters of 2011 and 2012

• Groundwater samples were collected from the extraction wells and groundwater treatment system quarterly and monthly, respectively. Vapor samples were collected from the SVE system twice monthly or monthly

• SVE system and groundwater treatment system continue to operate and are fully funded

Events Since October 2010 CAB MeetingEvents Since October 2010 CAB Meeting

• Permits were renewed during 2012 to continue operation of the treatment systems. These included:– Poor Quality Groundwater Withdrawal Permit;– Arizona Pollutant Discharge Elimination System

(AZPDES); and– Air Quality Permit with Maricopa County Air Quality

Department (MCAQD).

Events Since October 2010 CAB MeetingEvents Since October 2010 CAB Meeting

• ADEQ prepares operation & maintenance (O&M) reports for the Groundwater Remediation and Treatment System and the Soil Vapor Extraction (SVE) System on a quarterly basis

• Hydro Geo Chem, Inc. conducts site activities weekly to keep remediation systems operational

• Hydro Geo Chem, Inc. compiles monitoring reports on a semi annual basis

Groundwater System Update• The pumps in extraction wells EW-1 and EW-2 are

only pumps currently in operation• EW-3 and EW-4 were shutdown because of low PCE

concentrations in 2009• Rehabilitation activities were conducted at well EW-1

to increase well performance including:- replacing the pump- brushing the well- jetting the well- bailing the well, and- pumping the well

Groundwater System Update

• Repairs to the groundwater treatment system have included:

- gauge and valve replacement- leak repairs- meter calibration, and- disconnection from the City of Phoenix (COP)

sewer system

Groundwater System UpdateGroundwater System Update

PCE Concentrations In Extraction Well Samples

Well ID Sep-10 Dec-10 Mar-11 Jun-11 Sep-11

EW-1 12.8 14.4 3.7 8.2 20.0

EW-2 23.7 29.5 16.0 19.0 25.0

Well ID Dec-11 Mar-12 Jun-12 Sep-12 Dec-12

EW-1 22.0 20.0 Not Sampled Not Sampled 23.0

EW-2 27.0 23.0 23.0 16.0 17.0

Groundwater System Update• A total of 326,511,485 gallons of GW have been

pumped, treated and discharged as of 4th qtr 2012• A total of approximately 284.4 lbs of PCE have

been removed.• VOC concentrations for influent samples ranged

during 3rd qtr. 2010 through 4th qtr. 2012: Benzene: <0.50 µg/L (AWQS – 5 µg/L)

Chloroform: 2.8 - 4.8 µg/L (AWQS – 100 µg/L)cis-1,2-DCE: <0.50 - <0.50 µg/L (AWQS - 70 µg/L)PCE: 9.4 - 31 µg/L (AWQS - 5 µg/L)TCE: 1.1 - 5.5 µg/L (AWQS - 5 µg/L)1,2-DCA: <0.50 – <0.50 µg/L (AWQS - 5 µg/L)

Operation & Maintenance Statisticsfor the GW Treatment System

QuarterGallons Treated Percent Operational VOC/PCE Removed

(Lbs.)

4th Qtr 2010 8,060,637 99.6% 2.28/1.72

1st Qtr 2011 1,973,392 31.7% 0.29/0.21

2nd Qtr 2011 5,955,838 98.2% 1.10/0.78

3rd Qtr 2011 6,896,380 99.9% 1.77/1.29

4th Qtr 2011 6,620,320 100% 1.97/1.45

1st Qtr 2012 6,290,280 98.1% 1.81/1.35

2nd Qtr 2012 6,355,160 98.9% 1.64/1.22

3rd Qtr 2012 3,549,850 78.7% 0.70/0.51

4th Qtr 2012 5,694,750 77.7% 1.03/0.72

PCE Influent Concentration Changes with Time

0

100

200

300

400

500

600

700

800

Dec-200

2

Jul-2

003

Mar-20

04

Nov-200

4

Jul-2

005

Mar-20

06

Nov-200

6

Jul-2

007

Mar-20

08

Oct-20

08

Jun-2

009

Feb-20

10

Oct-20

10

Jun-2

011

Feb-20

12

Oct-20

12

S VE S yst em S t ar t up

PC

E C

once

ntra

tion

(ug/

L)

DW-N2 DW-N1

DW-W3

DW-W2

DW-W1 DW-S2 DW-S1DW-E3

DW-E2

DW-E1

One East Camelback Extraction WellNote: Water levels measured on January 21, 2011.

Elevation data for One East Camelback wells are monthly averagesand were obtained from Speyer & Associates, P.C. report datedApril 25, 2011.

1065.6

1064.0

1066.2 1065.41065.5

1064.2

1066.0

1065.2

1054.81055.3

1069.47

1068.44

1067.52

1067.34

1067.05

1067.82

1067.541068.05

1069.60

1069.85

1070.43

1070.05

1071.10

1070.66

1072.68

1071.10

1067.91 1067.49

1069.781069.63

1067

1068

1069

1070

1069

1068

1070

1071

1072

1072

1071

JANUARY 2011 GROUNDWATER ELEVATIONS

FIGURE 5

1072.65

1072.03

1072.351073.76

1070.19

1070.05

1070.34

1064.56

1065.74

1070.34

1067.881068.93

1067.81

1068.701069.22

1069.53

1068.47 1066.91

1068.771067.60

Note: Water levels measured on March 22, 2011.Elevation data for One East Camelback wells are monthly averagesand were obtained from Speyer & Associates, P.C. report datedApril 25, 2011

MARCH 2011 GROUNDWATER ELEVATIONS

FIGURE 7

DW-N2

DW-S1

1057.3

1063.9

1065.0

One East Camelback Extraction Well

1068

1070

1071

1072

1073

DW-N1

DW-S2

DW-W1

DW-W2

DW-W31053.2

1064.9

1064.9

1065.2

1065

1067

1069

DW-E1

DW-E2

DW-E3

1065.0

1063.8

1063.6

1066

1073.75

1072.56

1073.031074. 84

1071.56

1070.16

1070.58

1064.34

1065.93

1070.55

1067.961069.05

1067.83

1068.501069.14

1069.64

1068.57 1066.95

1068.911067.77

Note: Water levels measured on December 20, 2011.

DECEMBER 2011 GROUNDWATER ELEVATIONS

FIGURE 7

DW-N2

DW-S1

One East Camelback Extraction Well

1068

1070

1071

DW-N1

DW-S2

DW-W1

DW-W2

DW-W3

1065

1067

1069

DW-E1

DW-E2

DW-E3

1066

1072

1073

1074

1,072.72

1071.74

1072.28

1073.91

1070.72

1069.42

1069.74

1063.09

1064.94

1069.80

1067.071068.23

1067.16

1068.001068.57

1068.93

1067.731065.95

1068.14 1066.90

Note: Water levels measured on August 29, 2011.

AUGUST 2012 GROUNDWATER ELEVATIONS

FIGURE 6

DW-N2

DW-S1

One East Camelback Extraction Well

1065

1067

1068

DW-N1

DW-S2

DW-W1

DW-W2

DW-W31064

1064

1066

DW-E1

DW-E2

DW-E3

1069

1070

1071

1073

1072

SVE (soil) System Update

• Modifications to inlet piping and cooling system in 2011 created an increase in soil vapor flow

• Granular activated carbon (GAC) change-out was done in March, May, and November 2012

• Conducting quarterly performance tests of system as required by renewed Air Quality Permit

• An additional nested extraction well was connected to the system

Operation & Maintenance Statisticsfor the Soil Vapor Extraction (SVE) system

QuarterPercent Operational PCE/TCE Removed (Lbs.)

4th Qtr 2010 46% 136.3

1st Qtr 2011 28% 102.4

2nd Qtr 2011 50% 140.1

3rd Qtr 2011 46% 121.0

4th Qtr 2011 66% 152.3

1st Qtr 2012 13% 34.5

2nd Qtr 2012 73% 284.3

3rd Qtr 2012 100% 270.9

4th Qtr 2012 91% 412.7

SVE Influent Concentration Changes with Time

0

20

40

60

80

100

120

140

160

180

200

220

240

11/1/2007

3/1/2008

7/1/200

8

11/1/

2008

3/1/2009

7/1/200

9

11/1/200

9

3/1/2010

7/1/2010

11/1/2010

3/1/201

1

7/1/2011

11/1/2011

3/1/2012

7/1/201

2

11/1/2012

PC

E/T

CE

Soi

l Gas

Con

cent

ratio

n (p

pmv)

SVE Recovery With TimeCum

ula

tive

PCE/T

CE R

ecove

ry (

lbs)

0

500

1,000

1,500

2,000

2,500

3,000

3,500

4,000

4,500

5,000

31-O

ct-07

29-M

ar-08

26-A

ug-08

23-Ja

n-09

22-Ju

n-09

19-N

ov-0

9

18-A

pr-1

0

15-S

ep-10

12-F

eb-1

1

12-Ju

l-11

9-Dec

-11

7-M

ay-1

2

4-Oct-

12C

umul

ativ

e P

CE

/TC

E R

ecov

ery

(lbs/

day)

Recently conducted passive soil gas survey in the footprint of the former drycleaner building

Additional Site Investigation

Conducted soil and active soil gas sampling at three locations

Additional Site Investigation

2,300

140

2.8

Installed a nested soil vapor extraction well in the southwest corner of the former building

Additional Site Investigation

Future Planned Work

• Continue O&M Activities for both SVE and GW systems

• Continue to monitor water levels monthly and collect groundwater samples quarterly as budget allows

• Conduct soil investigation in northern portion of site and install 2 groundwater monitor wells

DW-N2 DW-N1

DW-W3

DW-W2

DW-W1 DW-S2 DW-S1DW-E3

DW-E2

DW-E1

One East Camelback Extraction Well

WQARF Boundary

Area of PCE Greater Than 5 ug/L