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Chevron <br /> Wo <br /> Chevron <br /> Chevron U.S.A.Products Company <br /> 2410 Camino Ramon <br /> June 9, 1994 San Ramon,CA 94583 <br /> P.O.Box 5004 <br /> San Ramon,CA 94583-0804 <br /> Marketing Department <br /> Ms. Linda Turkatte Phone 510 842 9500 <br /> San Joaquin County Environmental Health <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Chevron Station#9-6465, 5608 North Pershing Avenue, Stockton, CA <br /> Attached groundwater monitoring report(GTI,4129194) <br /> Dear Ms. Turkatte: <br /> Attached is a report, dated April 29, 1994, which was prepared by Chevron's consultant, 1 <br /> Groundwater Technology, Inc. (GTI), to describe groundwater monitoring and sampling that was <br /> performed at the subject site on March 25, 1994. <br /> All three site related monitoring wells were gauged and sampled. Please note, the top of casings <br /> were not resurveyed after recent wellhead repair work at wells MW-4A and MW-10. As a result, <br /> no potentiometric surface map, groundwater flow direction or gradient is provided in GTI's report. <br /> Historic site measurements have demonstrated a consistent flow direction toward the north- <br /> northeast. <br /> Monitoring wells MW-4A, MW 10, and MW-11 were sampled and analyzed for the presence of <br /> TPHGas and BTEX. Trace amounts of dissolved petroleum hydrocarbons were detected at each <br /> well. <br /> A letter dated.April 22, 1994, was sent by your agency to the Central Valley Regional Water <br /> Quality Control Board and requested their review and concurrence with your agency's <br /> recommendation for site certification. Until a formal reply is received from the Regional Board on <br /> this request, Chevron will continue groundwater monitoring at the subject site. <br /> If you have any questions or comments, I can be reached at(510) 842-8695. <br /> D ' <br /> Sincerely, <br /> JUN 1 3 1,994 <br /> Brett L. Hunter <br /> Environmental Engineer EN IRO j{M SERVICES LTH <br /> Site Assessment and Remediation <br /> H ad <br /> �Gj?Ct�7k <br />