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i <br /> gesOURCEE GROUP, INC.U <br /> October 19, 2011 <br /> Mr. James L.L. Barton, P.G. <br /> Region 5 Regional Water Quality Control Board <br /> 11020 Sun Center Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Re: Site Investigation Work Plan <br /> Former Countryside Market <br /> 10848 Copperopolis Road, Stockton, CA 95215 <br /> Dear Mr. Barton: <br /> On behalf of the California Regional Water Quality Control Board (CRWQCB) and the <br /> Department of General Services (DGS), The Source Group, Inc. (SGI) has prepared this Site <br /> investigation Work Plan (Work Plan) for the Former Countryside Market located at 10848 <br /> Copperopolis Road, Stockton, California, referred to as Emergency Abandonment and <br /> Recalcitrant (EAR) Site No. R10-129 (Site, Figure 1). This Work Plan has been prepared in <br /> response to CRWQCB correspondence entitled Work Plan Approval, Former Countryside <br /> Market, 10848 Copperopolis Road, Stockton, San Joaquin County (LUSTIS NO. 390783), dated <br /> December 4, 2008 (Appendix A). The objectives of the proposed scope of work described in <br /> this Work Plan are to: <br /> • Conduct a sensitive receptor to survey to identify domestic wells surrounding the <br /> property; and, <br /> • Characterize the lateral and vertical extent of petroleum hydrocarbon impact in soil and <br /> groundwater beneath the Site. <br /> BACKGROUND <br /> The Site is located in eastern San Joaquin County, approximately two miles east of the city <br /> limits of Stockton, and southeast of the intersection of Copperopolis Road and Tulsa Road. The <br /> Site vicinity is primarily rural residential and agricultural. The Site is vacant with the current <br /> owner occupying a single-family residence on a separate parcel of land directly south of the <br /> Site. <br /> Countryside Market, a former gasoline service station and convenience store occupied the <br /> property until about 1993. It is believed the property has been vacant since early 1993. <br /> In March 1993, Stockton Service Equipment Co. removed two 1,000-gallon leaded gasoline <br /> (underground storage tanks) from the property. Four soil samples (TK1N, TK1S, TK2N, and <br /> TK2S) were collected from beneath the USTs at depths of approximately 7.5 feet below ground <br /> surface (bgs). The samples were analyzed for total petroleum hydrocarbons as gasoline <br /> (TPHg), benzene, toluene, ethylbenzene, and xylenes (BTEX compounds), ethylene dibromide <br /> 944 McCourtney Road, Suite H Telephone: (530) 272-4200 <br /> Grass Valley, California 95949 Facsimile: (530)272-4211 <br />