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ii <br /> Chevron <br /> t Chevron U.S.A. Inc. <br /> 2410 Camino Ramon, San Ramon, California • Phone NO) 842-9600 <br /> Mail Address:P.O.Box 5004,San Ramon,CA 94583-8804 <br /> Marketing Department <br /> 'was <br /> March <br /> 2, 1992 � ,��� <br /> rV <br /> G" <br />- Ms. Mary Meays <br /> San Joaquin County Environmental Health o"NVIPO V� 'c t• <br /> P.O. Box 2009 PERMIT i 1 K } <br /> Stockton, CA 95201 <br /> Re: Former Chevron Station#9-1918 <br /> 45 East Harding Way, Stockton, CA <br /> Dear.Ms. Mcays: f` <br /> Please find attached a report dated February 18, 1992, which was prepared iby ;Chevron's <br /> consultant, EA Engineering, Science, and Technology(EA), to describe groundwater monitoring <br /> which was performed on January.17, 1992, at the site captioned above.. <br /> EA measured the depth to groundwater and collecte&a groundwater sample'from well MW-9. <br /> Laboratory analysis of the sample indicated that no benzene (B) or toluene(T) were detected but <br /> that ethylbenzene (E) and xylenes (X) were detected at con&mrations 'of,. 2.8 and. 1.6 ppb, <br /> respectively. I would like to point out,the B, T;E; and X levels were well below the established <br /> federal EPA Maximum Contaminant Levels of 5, 1000,700, and 10000 ppb,'.respectively,as well <br /> as the California State Action Levels of 1, 100, 680, and 1750 ppl, respectively'. <br /> if you.have any questions or comments, bean be reached at(51 0) 842-8658. <br /> Sincerely, t <br /> Clint 13. Rogers <br /> Engineer, Site Assessment and Remediation. <br /> Attachment <br /> cc: Elizabeth Thayer, Central Valley RWQCB, Sacramento;CA- <br /> .Geoffrey Bain(for RichardBlewett), 2146 Crestmoor Dr, SanBruno,^CA 94066 <br /> John Borkovich, GTI;Sacramento, CA <br /> Doug Oram, EA Engineering, Lafayette, CA (W/o enclosure) <br />