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3 y N § s <br /> Chevron <br /> Chevron U.S.A. Inc. <br /> 2410 Camino Ramon,San Raman,California•Phone 015)842-9500 <br /> Mail Addrosr P.O.Bax 5064,San Haman,CA 94583€004 <br /> Markdng Qeparlment <br /> MAI <br /> October 3, 1991Y <br /> N171... <br /> Mr.Harlin KnolIY <br /> San Joaquin County Environmental Health OCT 0 9 410,91 g <br /> P.O. Box 2009 ENVIRONMENTAL HEALTH ; <br /> Stockton,CA 95201 PERMIT/SERVICES <br /> Re: Former Chevron Station#9-0342 <br /> 1347 S.EI Dorado Street,Stockton,CA <br /> 1Y <br /> a Dear Mr.Knoll: <br /> Enclosed are two reports, both dated September 11, 1991, which were prepared by Chevron's f3 <br /> consultant, Groundwater Technology, Inc. (GTI), to describe recent field work at the site <br /> I referenced above. One of the reports describes :he installation of an offsite gr6andwater <br /> monitoring well,while the other report describer the results of monitoring the on and offsite wells. <br /> t J The groundwater gradient direction was consistent with previous observations at the site. The <br /> levels of dissolved hydrocarbons in the onsite ivells were consistent with earlier data, and there <br /> i were no hydrocarbons detected in the new offsite well. <br /> Chevron plans to continue to monitor the wells quarterly through the Spring of 1992. If levels do <br /> not increase,then Chevron would likely propose a reduction in the monitoring frequency. <br /> f If you have any questions or comments,you may contact me at(510)842-8558. t <br /> v <br /> Sincerely, <br /> z Clint B.Rogers <br /> '- ---- Environmental Engineer - -- ---- ---- - - <br /> --- ---- - - -- - — -- -- <br /> _ e <br /> Enclosures <br /> W. Elizabeth Thayer,Central Valley Regional Water Quality Control Board,Sacramento,CA <br /> '. .- Ramon Guerrero, 1327 S.Wilson Way,Stockton,CA 95205 <br /> Sandra Lindsey,GTI,Concord,CA(Wo enclosures) <br /> v <br />