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Chemn <br /> Chevron <br /> Chevron Products Company <br /> February 28, 1997 6001 Bollinger Canyon Road <br /> Building L <br /> San Ramon CA 94583 <br /> P 0 Box 6004 <br /> San Ramon CA 94583-0904 <br /> Mr Harlin Knoll s West <br /> g—Sale <br /> Marketing San Joaquin County Public Health Services Phone tin 842-9500le <br /> P O Box 388 <br /> Stockton, CA 95201-0388 <br /> Re Chevron Station#9-2033, 508 W Charter WE, Stockton, CA <br /> Attached Groundwater Monitoring Report(Blaine Tech, 9124196) <br /> Dear Mr Knoll <br /> Attached you will find a report dated September 24, 1996, which was prepared by Chevron's consultant, <br /> Blaine Tech Services, Inc (Blaine Tech) to describe the results of groundwater monitoring that was <br /> performed at the subject site on August 22, 1996 <br /> During their August site visit Blaine Tech gauged and sampled all three site-related wells The measured <br /> direction of groundwater flow was toward the northeast This was consistent with the regional flow <br /> direction as measured by others in the area All groundwatcr samples collected were analyzed for the <br /> presence of TPHGas, BTEX constituents, and MTBE In addition, samples from well MW-1 were <br /> analy/ed for waste oil constituents(i e , TPHD, TOG, SVOC's,HVOC's, and soluble metals) <br /> Dissolved petroleum hydrocarbons were detected at wells MW-1 and MW-3 only The measured <br /> concentrations were consistent with those previously detected at these wells There were no dissolved <br /> hydrocarbons detected at well MW-2 All three wells were sampled having submerged screen conditions <br /> There were detections of SVOC's, HVOC's, and TPHDiesel-range hydrocarbons measured at well MW-1 <br /> There were 510 ppb of MTBE detected at well MW-1 MTBE was reported as being below detection limits <br /> at wells MW-2 and MW-3 <br /> If you have any questions or comments, I can be reached at(5 10) 842-8695 <br /> Sincerely, <br /> Brett L Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> Attachment <br /> cc Elizabeth Thayer, Central Valley RWQCB, Sacramento, CA <br /> Mrs Pearl Myer, 1120 South Hunter Street, Stockton, CA 95206 <br /> Bette Owen, Chevron Products Company, San Ramon, CA (w/o attachment) <br /> �G <br /> � fL elf <br />