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y <br /> Cltmn <br /> Chewon U.S.A.Inc. <br /> s 2410 Camino Ramon,San Ramon,Califomia.Pho;ie 14151842 9500 <br /> Mad Add=P.B.Bex 5M4,San Raman,CA 9458341B04 <br /> Marketing Department <br /> October 3, 1991 rte, <br /> -1 <br /> Mr.Harlin knoll ' <br /> San Joaquin County Environmental Health OCT Q 9 'ng1 <br /> P.O.Box 2009 ENVIRONMENTAL HEALTH <br /> Stockton,CA 95201 PERMIT/SERVICES <br /> i <br /> Re: Former Chevron Station#9-0342 <br /> 1347 S.El Dorado Street,Stockton,CA <br /> f <br /> 1 Dear Mr Knoll: <br /> Enclosed are two reports, both dated September 11, 1991,which were prepared by Chevron's <br /> consultant, Groundwater Technology, Inc. (GTI), to describe recent field work at the site <br /> referenced above. One of the reports describes the 1-gallation of an offsite groundwater <br /> monitoring well,while the other report describes ibe results of monitoring the on and offsite wells. i <br /> Theundwater <br /> gro gradient direction was consistent with previous observations at the site. The <br /> levels of dissolved hydrocarbons in the onsite wells were consistent with earlier data,and there <br /> were no hydrocarbons detected in the new offsite well. . <br /> Chevron plans to continue to monitor the wells quarterly through the Spring of 1592. If levels do <br /> not increase,then Chevron would likely propose a reduction in the monitoring frequency. <br /> If you have any questions or comments,you may contact me at(510)842-8658. <br /> i <br /> Sincerely, <br /> - :. <br /> Clint B.Rogers <br /> Environmental Engineer <br /> Enclosures <br /> -; ow ElImbeth Thayer,Central Valley Regional Water Quality_Control Board,Sacrarncnto,CA--------—----- <br /> — - <br /> ------Ramon Guerrero►-1327 S,-Wilson Way,Stockton,CA 95205 — ; -- <br /> Sandra Lindsey,GTI,Convord,CA(w/o enclosures) <br /> =t <br /> .. .. <br />