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Chevron <br /> No, Chevron U.S.A. Inc. <br /> 2410 Camino Ramon, San Ramon, California • Phone (415) 842-9500 " <br /> Mail Address:P.O.Box 5004 San Ramon CA 94583-0804 <br /> Marketing Operations p� ��! T � <br /> D. Moller <br /> Manager,Operations <br /> S. L. Pattersons <br /> Area Manager,Operations <br /> C. G.Trimbach <br /> Manager,Engineering September 12, 1990 <br /> Mr . Greg Lyon <br /> San Joaquin County Public <br /> Health Services <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Re: Chevron Service Station #9-4275 <br /> 2905 W. Benjamin Holt Drive <br /> Stockton, CA <br /> Dear Mr . Lyon: <br /> Per your request enclosed are copies of the Quarterly Sampling Re- <br /> ports dated April 3, 1990 and September 15, 198.9, conducted by our <br /> consultant Western -Geologic Resources, Inc. at the above referenced <br /> site. Also enclosed is a letter of rationale prepared by our con- <br /> sultant, Groundwater Technology, Inc. dated September ll, 1990, <br /> which discusses the rationale for the proposed well in Plymouth <br /> Road.. Also enclosed are composite figures showing the combined <br /> groundwater elevation data and dissolved benzene concentrations <br /> for both the ARCO and Chevron sites as measured in March of 1990. <br /> We would appreciate your review and concurrence of the work plan <br /> dated June 28, 1990 . Chevron will continue to sample this site <br /> on a quarterly basis. <br /> If you have any questions or comments please do not hesitate to <br /> call me at ( 415) 842-9581. <br /> Very truly yours, <br /> C. G. Trimba h <br /> By. <br /> I <br /> Nancy V kelich <br /> NLV/jmr <br /> Enclosures <br /> cc: Mr . Gordon Boggs <br /> RWQCB - Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, CA 95827-3098 <br /> t <br />