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Ms. Laurie Cotulla <br /> October 5, 1987 <br /> Page 3 <br /> "1 <br /> Table 1. Analytical Results of August 20, 1987, <br /> _ Soil Sample, ARCO Station 2133 <br /> Sample <br /> number Detection Designated <br /> Constituent WO-1 limit levels <br /> EPAb 8010; solvents ND 0.001 Variable° <br /> EPA 8015, modified; total ^1 <br /> :petroleum fuel hydrocarbons 3,719 ,i 10 NE <br /> EPA 8020 <br /> Benzene 0.'15 0.005 0.7 <br /> Ethylbenzene 0..76 0.005 680 <br /> Toluene . 0.112 0.005 100 <br /> Xylene 1.2 0.005 620 <br /> EPA 8080; PCBsd ND 0.1 0.00079 <br /> aCali£ornia Regional Water Quality Control Board, Central Valley <br /> Region, designated level. in soil for the protection of groundwater <br /> bquality (September 1986) . <br /> U.S. Environmental Protection Agency Method. <br /> °Variable Eecause many different types of solvents are tested by <br /> EPA Method 8010. <br /> dPolychlorinated biphenyls. <br /> Nate: All results shown in milligrams per kilogram; <br /> ND = nondetectable, NE = not established. <br /> Soil sample WO-1 had detectable levels of total petroleum fuel <br /> hydrocarbons. No designated levels have yet been established for <br /> total petroleum fuel hydrocarbons. Benzene, ethylbenzene, toluene, <br /> and xylene constituents were detectable in sample WO-1, but below <br /> the California Regional Water Quality . Control Board designated <br /> levels in soil for the protection of groundwater quality (September <br /> 1986) . All other constituents in sample WO-1 were nondetectable. <br /> Based on the history of the site and the results of BC's May 25, <br /> 1987, site investigation, we expected that the soil beneath and <br /> -- .----a round--thd—wa s te--o i 1—tank—would—have—de tec tab le----hyd rocar bon--_ <br /> product. The hydrocarbon product found in soil sample WO-1 is <br /> `•J partly due to the May 24, 1984, product leak at the site. <br /> BROWN AND CALDWELL _ <br /> 723 SS1REEI $ACRAILWO.CA95814 Q123 - - - - <br />