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Chevron <br /> Kelly C.Esters Chevron Environmental <br /> Property Specialist Management Company <br /> Retail and Terminal 6001 Bollinger Canyon Road <br /> San <br /> Business Unit San Ramon,CA 94583 <br /> Tel (925)842-9559 <br /> Fax(925) 842-8370 <br /> kesters@chevron.com <br /> September 10, 2007 _ <br /> Lori Duncan `=' lJ V E- <br /> San Joaquin County Environmental Health Department _ <br /> 600 E. Main Street S F P 1 1 2007 <br /> Stockton, CA 95202-3029 <br /> ENVIRONMENT HEALTH <br /> Re: 3978 S. Highway 99/East Frontage Road, Stockton, CA PERNT/SERVICES <br /> Dear Ms.Duncan: <br /> Chevron conducted an internal file review of all available archived records for the above- <br /> referenced property. This review produced very little information. However,what documents we were <br /> able to locate indicate that Texaco's ground lease for the property located at U.S.HWY 99 &Clark <br /> (believed to be the above-referenced property),was terminated effective October 13, 1973. Copies of <br /> these documents are attached for your reference. <br /> Chevron conducted a review of the technical data obtained through a file review at the San <br /> Joaquin County Environmental Health Department. It appears that the main constituents of concern <br /> (COCs)at this site are methyl tertiary butyl ether(MTBE)and 1-2, Dichloroethane(1-2,DCA). MTBE <br /> was not used in the industry as a fuel additive until 1979,and Texaco did not begin using MTBE in the <br /> region until 1992. The MTBE detections indicate that the release occurred after Texaco's tenure on the <br /> site,which lasted from 1957 to 1973. 1-2,DCA is present on the site at elevated concentrations,but there <br /> is no reason to connect such releases to service station operations as it is a common industrial solvent. <br /> Therefore, it is unlikely that Texaco contributed to the current environmental conditions at the site. <br /> We are unaware of any information to support a claim that Texaco's operation of a service station <br /> contributed to the current contamination.. Without such information, Chevron cannot accept responsibility <br /> for the current environmental conditions on the site or cooperate with any remediation associated with <br /> such conditions. <br /> Should you have any questions or wish to discuss this further,please do not hesitate to contact me <br /> at(925)842-9559 or the Chevron Project Manager, Stephanie Furgal at(925) 842-1466. Thank you. <br /> Very truly yours, <br /> �—QA 0/ <br /> Kelly C.Esters <br /> Property Specialist <br /> KCE:st <br /> Encl. <br /> cc: Stephanie Furgal, Chevron Environmental Management Company <br />