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O4/10/2002 10:40 20946e34? FIFTH FLOOR PAGE 02 <br /> `./ -1r <br /> PUBLIC;` HEALTH SERVICES <br /> SAN JOAQUIN COUIS= a <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst,M.D.,M.P.H., Health Officer <br /> 304E East Weber Avenue,Third Floor •Stockton,CA 95202 <br /> 209/468-3420 <br /> OCT 2 92051 <br /> MR ROBERT COCHRAN <br /> CHEVRON. PRODUCTS COMPANY <br /> PO BOX 6004 <br /> SAN RAXON CA 94583 <br /> RE: 2409 E MAIN STREET Site Code:505603 <br /> STOCKTON CA <br /> San Joaquin County Public Health Services Environmental Health Division(PHS/EHD) has reviewed the <br /> Quarterly Monitoring Report dated October 8,2001, and the Request for Site Closure dated April 6,2000, <br /> prepared by SECOR for the above referenced site. <br /> This site doesn't have a monitoring well downgradient of the former location of the underground storage <br /> tanks. A monitoring well must be installed between MW-1 and the former station building. Groundwater <br /> samples should be analyzed quarterly for Total Petroleum Hydrocarbons as gasoline by EPA Method 8015, <br /> Benzene, Toluene, Ethylbenzene and Xylene by EPA Method 8020, and MtBE and other Oxygenate <br /> cornpounds by EPA Method 8260. <br /> Conduct a complcte well survey of domestic,municipal,agricultural,industrial and any other wells within a <br /> 2,000-foot radius of this site. Contact the Department of Water Resources,municipal water suppliers and <br /> nearby industries for well information. Perform a physical search of the area to identify any wells. Show <br /> the locations of all wells and submit any known construction details of the wells. Identify all sources of <br /> information in the well survey report and clearly depict each well location as they relate to the above <br /> referenced site. A survey should also be conducted to locate any other potential conduits. Discuss <br /> conclusions regarding public and environmental health risks as they relate to the pumping influence of these <br /> identified wells,migration through conduits and the potential impact of the contaminant plume. <br /> Additional information is required before this site can be considered for closure. Submit a work plan for <br /> installation of the downgradient monitoring well by l ecetn"ber 6,2001. - <br /> If you have any questions, please call Rebecca E. Setliff, EHS, the assigned caseworker for this site, at <br /> (209)468-3440 or Margaret Lagorio,Supervising REHS at(209)468-3449. <br /> Donna Heran,REHS,Director <br /> Environmental Health Division <br /> Rebecca E.Setliff,EHS Margate gorio,REHS <br /> LOP/Site Mitigation Unit IV Supervisor Unit IV <br /> cc: Marty Hartzell-CVRWQCB <br /> Roger Hoffmore-SECOR <br /> A of Can Tnarnjin County Health Cafe Services <br />