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r <br /> R <br /> t <br /> Wiggins & Associates, Stockton, California / Project 309101 July 3I, 2991 <br /> CHEMICAL ANALYSIS RESULTS <br /> Chemical analysis results of the samples and their respective <br /> depths are presented in Table 1, Chemical Analysis Results of Soil <br /> Boring Samples. Laboratory copies are in Attachment 2, Laboratory <br /> Results and Sample Chain of Custody. <br /> Chemical analysis results of the soil samples reveal detectable <br /> levels of gasoline and diesel compounds in soil samples B-1-11, <br /> B-1-12, B-3-5, B-6-4, B--6-5, B-7-4, B-7-5 and B-8: Samples <br /> recovered from Borings B-2, B-4, B-5 and B-9 had gasoline and/or <br /> Diesel compounds below laboratory detection limits. The soil <br /> analysis results reveal relatively high TVH Gas and BTLX levels in <br /> samples B-1-11, B-1--12, and B-3-5, recovered near the soil - ground <br /> water interface. Detectable levels of Benzene and Total Xylenes <br /> are in samples B--6-4 and B-6-5, recovered near the soil - ground <br /> water interface. Sample B-7-4, also recovered near the soil -- <br /> ground water interface, has detectable levels of TVH Gas, Benzene, <br /> and Total Xylenes. Sample B-8-1, recovered approximately 2-1/2 <br /> feet below the diesel dispenser, has detectable levels of Diesel. <br /> SUMMARY <br /> An abandoned card-lock fuel station exists on the site. <br /> Reportedly, the fuel station has been abandoned since May, 1990. <br /> Three 12,000-gallon capacity underground fuel storage tanks (two <br /> gasoline and one diesel) are located at the site. Review of SJCPHS <br /> files revealed the fuel tanks have failed precision tests; once in <br /> 1987, and again in 1989. The quantity of materials discharged is <br /> not indicated in these files. <br /> ; Wo <br /> TMC Environmental, Inc. / San Pablo, California 7 of 12 <br />