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�✓ Chevron <br /> too Chevron <br /> Chevron U.SA products Company <br /> 6001, Bollinger Canyon Rd.,Bldg. L_ <br /> P.O. Box 5004 <br /> San Ramon,CA 94583-0804 <br /> Site Assessment&Remediation Group <br /> Phone 1510►842 -9500 <br /> October 8, 1995 <br /> Ms.Mary Meays <br /> San Joaquin County Environmental Health <br /> P.O. Box 388 <br /> Stockton,CA 95201-0388 <br /> Re: Chevron Station#9-0557, 139 South Center Street, Stockton,CA <br /> Attached groundwater monitoring report(Blaine Tech, 8/31/95) <br /> Dear Ms. Meays: <br /> Please find attached a report dated August 31, 1995,which was prepared by Chevron's consultant,Blaine <br /> Tech Services Inc. (Blaine Tech),to describe the results of groundwater monitoring that was performed at <br /> the subject site on August 3, 1995. <br /> During their August site visit,Blaine Tech gauged and sampled-all six site-related wells.The measured <br /> groundwater elevations at each well continued to be the highest observed at the subject site since 1991. <br /> The direction of.groundwater flow beneath the subject site continued to be toward the southeast. All <br /> groundwater samples were analyzed for the presence of TPHGas and BTEX constituents.Detectable <br /> concentrations of dissolved petroleum hydrocarbons were measured at all wells except MW-3 and MW-4. <br /> The measured levels were consistent with those detected during previous monitoring events. <br /> A workplan for.further site investigation has been submitted to your agency. Chevron's consultant, <br /> Groundwater Technology,Inc. (GTI)is currently securing access for the proposed offsite groundwater <br /> monitoring well.Field work will begin once access has.been secured. <br /> If you have any questions or comments,I can be reached at(510) 842-8695. <br /> Sincerely, <br /> Brett L.Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br />