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PUBLIC HEALTH SERVICES ..¢�.�o <br /> SAN JOAQUIN COUNTY ' { <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue,Third Floor • Stockton, CA 95202 �iFOR <br /> 209/468-3420 <br /> OCT 2 9 2001 <br /> MR ROBERT COCHRAN <br /> CHEVRON PRODUCTS COMPANY <br /> PO BOX 6004 <br /> SAN RAMON 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 /> compounds by EPA Method 8260. <br /> Conduct a complete 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 December 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 /> V <br /> Rebecca E.Setliff,EHS Margareagorio,REHS <br /> LOP/Site Mitigation Unit IV Supervisor Unit IV <br /> cc: Marty Hartzell-CVRWQCB <br /> Roger Hoffmore-SECOR <br /> A Division of San Joaquin County Health Care Services <br />