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0 0 <br /> California Regional Water Quality Control Board <br /> Central Valley Region C. k, <br /> Steven T. Butler,Chair <br /> Winston H.Hickox Gray Davis <br /> Secretaryfor Sacramento Main Office , overnor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/mgcb5 c7 <br /> Protection - 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> ,j <br /> 5 October 2000 <br /> Mr. Cecil Dillon Mr. Richard Bokides Mr. Navtej Dhingsk <br /> Flag City Ltd. Partnership Bokides Family Ltd. Part. First Invest. Flag C 1 Inc,`: <br /> 1820 W. Kettleman Lane, Suite E 6421 Capitol Avenue 5517 Coronawood Lane <br /> Lodi, CA 95242 Lodi, CA 95242 Carmichael, CA 95608 <br /> REVIEW FINAL REMEDIA TION PLAN <br /> FLAG CITY CHEVRON, 6421 CAPITOL AVENUE,LODI, SAN JOAQUIN COUNTY <br /> CLEANUP AND ABATEMENT ORDER NO. 5-00-700 <br /> I reviewed your 31 August 2000 Final Remediation Plan (FRP) submitted by Advanced <br /> GeoEnvironmental, Incorporated (AGE) for the subject site. The FRP contains results of additional <br /> aquifer testing, a proposed groundwater remediation system design, and a schedule of activities to start <br /> groundwater extraction and treatment. <br /> AGE completed a second aquifer test of the shallow and intermediate groundwater zones to design the <br /> on-site groundwater extraction system. Aquifer parameters and the radius of influence were calculated, <br /> and AGE proposes to install seven six-inch diameter extraction wells in the shallow groundwater zone <br /> screened from 10 to 35 feet. The extraction wells will operate at 3 to 6 gallons per minute for a total <br /> discharge rate of 25 gallons per minute (gpm). <br /> Extracted groundwater will be pumped through a series of carbon vessels to remove TPH and BTEX <br /> constituents, and then through a series of MtBE-specific carbon vessels to remove MtBE. Treated <br /> groundwater will be discharged to a privately owned conveyance ditch south of the site under the <br /> General Order No. 5-00-119 for Discharge to Surface Waters of Groundwater from Cleanup of <br /> Petroleum Fuel Pollution. The groundwater cleanup is expected to take approximately 24 months. <br /> In Section 4.2 of the FRP, AGE stated "...cleanup goals approaching maximum contaminant levels <br /> (MCLS) are not realistic nor reasonable", and "We [AGE]propose to implement the pump and treat' <br /> system until the point of diminishing return is achieved, which is proposed as when the resulting <br /> concentrations vary less than 10%for six consecutive months. " Your determination of site cleanup <br /> goals is not approved. The unauthorized release of petroleum hydrocarbons at your site has degraded the <br /> beneficial uses of the groundwater and impacted a drinking water supply well. Therefore,you are <br /> required to clean up the groundwater and restore the beneficial uses of the water. Your cleanup goal for <br /> MtBE is based on the Secondary MCL for MtBE, which is 5 µg/1. If your proposed pump and treat <br /> system does not adequately meet this cleanup goal, you will be required to implement additional <br /> remedial actions to complete site cleanup. In addition, destruction of Rocky's Domestic Well (RDW-1) <br /> or elimination of other sensitive receptors does not constitute a relaxation of the cleanup goals or <br /> alleviate the requirement to clean up groundwater contamination. <br /> California Environmental Protection Agency <br /> sZa Recycled Paper <br />