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Chevron <br /> Chevron <br /> JUN 16 <br /> IriONhP 7` Chevron Products Company <br /> , l o �, t ikf 6001 Bollinger Canyon Road <br /> June 12, 1997 <br /> AERN r Building L <br /> San Ramon CA 94583 <br /> PO Box 6004 <br /> San Ramon CA 94583 0904 <br /> Mr Ron Rowe Marketing—Sales West <br /> San Joaquin County Public Health Services Phone 510 B42 9500 <br /> 304 E Weber Ave Third Floor <br /> Stockton CA 95202 <br /> I <br /> Re Chevron Station# 9-1452 334 E Main St Ripon, CA <br /> Attached Groundwater Monitoring Report (Blaine Tech, 412197) <br /> Dear Mr Rowe <br /> Please find attached a report dated April 2, 1997,that was prepared by Chevron's consultant, Blaine Tech <br /> Services, Inc (Blaine Tech), to describe the results of groundwater monitoring that was performed at the <br /> subject site on February 28, 1997 <br /> During their February site visit Blaine Tech gauged and sampled all four site-related wells The measured <br /> direction of groundwater flow was generally toward the west Groundwater samples were each analyzed <br /> for TPHGas, BTEX constituents, and MTBE There were no detectable concentrations of petroleum <br /> hydrocarbons measured at any of the wells There was 3 6 ppb MTBE detected at well MW-4 only These <br /> data are consistent with previous site monitoring data <br /> A closure summary report is forthcoming If you have any questions or comments, please contact me at <br /> (510) 842-8695 <br /> Sincerely, <br /> ALO <br /> Brett L Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> Attachment <br /> cc Elizabeth Thayer, Central Valley RWQCB, Sacramento, CA <br /> Sanwa Trust and Investment Trustee For The Gwendolyn Schaffer Trust, 4400 MacArthur <br /> ., Blvd, Suite 240, Newport Beach, CA 92660 <br /> rr <br /> vs <br />