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Chumn <br /> a Chevron <br /> r <br /> Chevron U S A Products Company <br /> 6001 Bollinger Canyon Road <br /> Building L <br /> San Ramon CA 94563 <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,3/23/95) <br /> Dear Mr Knoll <br /> Please find attached a report dated March 23, 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 /> February 26, 1995 <br /> In February,Blaine Tech gauged and sampled all three site-related wells The measured direction of <br /> groundwater flow was toward the southeast All groundwater samples were analyzed for the presence of <br /> TPHGas and BTEX constituents Detectable concentrations of dissolved petroleum hydrocarbons were <br /> measured at wells MW-2 and MW-3 The levels measured at MW-3 were consistent with those detected <br /> during previous site monitoring events However,the detections at MW-2 were unusual Results obtained <br /> from MW-2 during the third quarter sampling event will be evaluated to confirm any possible trend that <br /> may be developing at this well location <br /> If you have any questions or comments, I can be reached at(510) 842-8695 <br /> Sincerely, <br /> ,e _ / J <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 />