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Chevron <br /> Chevron <br /> Chevron U 5 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 <br /> 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, 6/13/95) <br /> Dear Mr Knoll <br /> Please find attached a report dated June 13, 1995,which was prepared by Chevron's consultant,Blaine <br /> Tech Services,Inc (Blaine Tech),to describe groundwater monitoring performed at the subject site on <br /> May 16, 1995 <br /> During their May site visit Blaine Tech gauged all three site-related wells The groundwater elevations <br /> beneath the subject site were the highest measured since 1990 The measured direction of groundwater <br /> flow was northeasterly Groundwater samples were collected from wells MW-3 and MW-4 and were <br /> analyzed for the presence of TPHGas and BTEX constituents Concentrations of dissolved petroleum <br /> hydrocarbons were only detected at well MW-3 The measured concentrations were similar to those <br /> detected during previous site monitoring events Groundwater results were non-detect for samples from <br /> MW-4 <br /> If you have any questions or comments, I can be reached at(510) 842-8695 <br /> Sincerely, <br /> /,* / A — <br /> Brett L Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> Attachment <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 />