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Y <br /> Chevron ' ; �'. <br /> Chevron U.S.A. Inc. <br /> 2410 Camino Ramon,San Ramon,California Phone{4151842-9500 . .. ... <br /> Mail Address po Box 5004,San Aamcn.CA 945BJ 0804 JAN raj <br /> '�. January 7, 1991 ENVIE OiNT"AENTAL HEAL-1-H <br /> MxketingDepartment PERP,r IYSEE;VICES <br /> Ms. Diane Hinson JAI <br /> San Joaquin County Environments! Health ENV140Nir,,- ; <br /> p, 0. Box 2009 PERM IT/SEP vl�,_._: <br /> Stockton, CA 95201 <br /> Re: Former Chevron SS09-1918 <br /> 45 East Harding Way, <br /> Stockton, CA <br /> Dear Ms. Hinson: <br /> i <br /> Enclosed is a ted <br /> quarterly monitoringP° eldepared by Chevron's wnrk performed at he consultant, <br /> E referenced above on <br /> October 30, 1990, which describes <br /> September 18, 1990. <br /> wells t <br /> be dry. Chevron <br /> A are <br /> EA was onsite to obtain groundwater <br /> catio s samples <br /> nd methods t founf orldrilling additional deeper welsEat the <br /> currently discussing appropriate to <br /> site. <br /> Since November 1990, a vapor extraction and treatment system has been operating at greater than <br /> 99 percent hydrocarbon destruction efficiency, <br /> the new project manager for this site, and 1 apologize for any <br /> ! have only recently become <br /> reporting delays that may have resulted from the transition period. <br /> If you have any questions or comments, please contact me at (415) 842-8658. <br /> Sincerely, <br /> CHEVRON U.S.A. INC. <br /> By <br /> Clint B. Rogers <br /> Environmental Engin er <br /> CBR/jt:T1-65 <br /> Enclosure <br /> —— ---- . - <br /> cc: ----Jim Maughan,-Central_Valley.RWQ_..B - - - - _ <br /> Richard Blewett, William S. Moss Trust, 455 Upper Terrace,-Ste - <br /> San Francisco, CA 94117 <br /> Bette Owen, Chevron Property Management <br />