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r - <br /> Chevron <br /> %I 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 /> SV.-� <br /> s�wA& Remediation Group <br /> July 12, 1995 :1 Y <br /> ��'V�..J7{ <br /> J U L 14 1995 <br /> Mr. Michael Infuma <br /> San Joaquin County Environmental Health ENVIRONMENTAL HEALTH <br /> P.O. Box 2009 PERMIT/SERVICES <br /> Stockton, CA 95201 <br /> Re: Former Chevron Station#9-4054 2103 Country Club Blvd Stockton CA <br /> Attached groundwater monitoring report(Blaine Tech, 1/2/95) <br /> Dear Mr. Infuma: <br /> Please find attached a report dated January 2, 1995, which was prepared by Chevron's consultant, <br /> Blaine Tech Services, Inc. (Blaine Tech), to describe groundwater monitoring performed at the <br /> subject site on November 23, 1994. <br /> During their November site visit Blaine Tech gauged and sampled all seven site-related wells. The <br /> measured direction of groundwater flow was northeasterly. The calculated hydraulic gradient was <br /> 0.003 ft/ft. Groundwater samples were analyzed for the presence of TPHGas and BTEX <br /> constituents. Detectable concentrations of dissolved hydrocarbons were measured at all seven <br /> wells. With the exception of well MW-7, the detected concentrations were similar to those <br /> measured during previous site monitoring events. The measured concentrations at MW-7 were <br /> lower than usual. Analytical results from next quarter's sampling will be evaluated to confirm any <br /> developing trends. <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 />