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L ,1!60 <br /> L Earth Systems Environmental, Inc. <br /> A Member of The Eerih Systema Oroo <br /> L6701 McDivitt Drive, Suite B • Bakersfield,CA 93313 • (805)836-0901 • FAX(805)836-0911 <br /> L March 7, 1992 Doc. No.: 9203 -MI6.PRP <br /> Project No.: EB-8101-1 <br /> L Ms. Margaret Lagario <br /> San Joaquin County Department of <br /> Environmental Health Services <br /> L P. O. Box 2M <br /> Stockton, California 95201 <br /> LSUBJBL"E A <br /> L <br /> L Reference: Tank Closure Report, Morita Brothers Service Station <br /> Earth Systems Environmental, January 23, 1992. <br /> L Dear Ms. Lagario, <br /> This communication presents our worm plan for soil characterization activities at the <br /> above referenced site (Figure 1). <br /> L <br /> Total <br /> LPurgeable Hydrocarbons as gasoline were detected a at a s <br /> GOMM below surface grade beneath the south end of the former tank, and atm <br /> below surface grade beneath the north end of the former tanL OM <br /> at a depth of now <br /> beneath the protect pipelines associated with the northern gasoline dispensers. The <br /> Lfuel constituent volatile aromatics benzene, toluene, ethylbenzene, and total xylenes <br /> were also detected at concentrations in excess of Regional Water Quality Control Board <br /> L (RWQCB) guidelines in samples from beneath the former tank and product pipelines, <br /> and have resulted in the Lead Implementing Agency (LIA) which is the San Joaquin <br /> L County Department of Environmental Health Services requesting an initial site <br /> d"Wacterization. <br /> L <br /> t <br />