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Central and Camelback WQARF Site

Central and Camelback WQARF Site. Kevin Snyder, Project Manager. Wendy Flood, Community Involvement Coordinator. Andre Chiaradia, Unit Manager. August 20, 2013 6:00pm. Groundwater Treatment Compound. EW-1. CC-5. EW-2. EW-3. SVE Compound. SVE-1. EW-4. SVE-FC. SVE-MP1. SVE-2S

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Central and Camelback WQARF Site

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  1. Central and Camelback WQARF Site Kevin Snyder, Project Manager Wendy Flood, Community Involvement Coordinator Andre Chiaradia, Unit Manager August 20, 2013 6:00pm

  2. Groundwater Treatment Compound EW-1 CC-5 EW-2 EW-3 SVE Compound SVE-1 EW-4 SVE-FC SVE-MP1 SVE-2S SVE-2D SVE-MP2

  3. Events Since January 2013 CAB Meeting • SVE system and groundwater treatment system continue to operate and are fully funded. • Groundwater samples were collected from monitor wells during the first and second quarters of 2013. • 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.

  4. Events Since January 2013 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 groundwater monitoring reports on a semi annual basis.

  5. Events Since January 2013 CAB Meeting • Conducted Industrial Survey in the area. • Conducted a passive soil gas survey along Central Avenue north of Camelback Road. • Installed a groundwater monitor well on East Colter Street and one on East Medlock Drive.

  6. Groundwater System Update • The pumps in extraction wells CC-5 and EW-2 are only pumps currently in operation. • EW-3 and EW-4 were shutdown because of low PCE concentrations in 2009. • EW-1 was shutdown because of low pumping rate.

  7. Groundwater System Update • Repairs to the groundwater treatment system have included: • shutdown of extraction well EW-1 and startup of extraction well CC-5 • granular activated carbon (GAC) replacement • gauge and valve replacement/calibration, and • sump pump switches replacement

  8. The groundwater remediation and treatment system was started January 2003 and was fully operational February 2003. To this point the groundwater remediation and treatment system has removed approximately 286.1 lbs of PCE from groundwater. • The soil vapor extraction (SVE) system was started November 2007. To this point the SVE system has removed approximately 5,713.4 lbs of PCE from soil. Events Since January 2013 CAB Meeting

  9. Groundwater System Update • A total of 336,529,705 gallons of GW have been pumped, treated and discharged as of 2nd qtr 2013. • A total of approximately 286.1 lbs of PCE have been removed.

  10. Groundwater System Update • Range of VOC concentrations for influent samples first half of 2003 and first half of 2013: Concentrations In micrograms per liter (µg/L)

  11. PCE Influent Concentration Changes with Time PCE Concentration (ug/L)

  12. SVE (soil) System Update • Granular activated carbon (GAC) change-out was done in February and May 2013. • Conducting quarterly performance tests of system as required by renewed Air Quality Permit.

  13. Operation & Maintenance Statistics for the Soil Vapor Extraction (SVE) system

  14. SVE Recovery With Time Cumulative PCE/TCE Recovery (lbs) Cumulative PCE/TCE Recovery (lbs/day)

  15. Additional Site Investigation Recently conducted passive soil gas survey along Central Avenue north of Camelback Road.

  16. Additional Site Investigation Installed two groundwater monitor wells to better define edge of northern plume.

  17. 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. • Continue soil investigation in northern portion of site and install additional groundwater monitor wells in northern portion and drill and sample soil borings.

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