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McWan <br /> Chevron <br /> i <br /> Chevron U S A Products Company <br /> 6001 Bollinger Canyon Road <br /> Building L <br /> San Ramon CA 94583 <br /> PO Box 5004 <br /> San Ramon CA 94583 0804 <br /> October 10, 1995 Marketing—Northwest Region <br /> Phone 510 842 9500 <br /> Mr Harlin Knoll <br /> San Joaquin County Environmental Health <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> Re Former Chevron Station#9-0342 1347 S El Dorado Street Stockton CA <br /> Attached groundwater monitoring report(Blaine Tech, 9/15/95) <br /> Dear Mr Knoll <br /> Please find attached a report dated September 15, 1995,which was prepared by Chevron's consultant, <br /> Blaine Tech Services, Inc (Blaine Tech),to describe the results of groundwater momtormg that was <br /> performed at the subject site on August 3, 1995 <br /> During their August site visit Blaine Tech gauged and sampled all three site-related wells The <br /> groundwater elevations beneath the subject site were the highest ever measured during any of Chevron's <br /> site monitoring work The groundwater flow direction during August was toward the northwest All <br /> groundwater samples were analyzed for the presence of TPHGas and BTEX constituents Except for 1 2 <br /> ppb benzene detected in well MW-4,all other analytes were non-detect The results from well MW-2 were <br /> consistent with previous data collected from that well As a result,the February, 1995 data reported from <br /> well MW-2 appears to be an unusual detection and is probably not indicative of any developing trend No <br /> explanation is offered at this time for the February data <br /> If you have any questions or comments, I can be reached at(510) 842-8695 <br /> Sincerely, <br /> k� /647/6 <br /> Brett L Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> Attachment <br /> A <br /> cc Elizabeth Thayer, Central Valley RWQCB, Sacramento, CA <br /> Ramon Guerrero, 1327 S Wilson Way, Stockton, CA 95205 <br /> Bette Owen, Chevron USA,Products Company, San Ramon, CA (w/o attachment) <br />