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Mr. Greg Sinnigen <br /> 28 July 1992 ; <br /> Page'2 <br /> The OVA was also used to screen selected soil samples collected during the excavation of <br /> the soil. These readings were used by Hess and Hess personnel to determine the limits of i <br /> the excavation. <br /> LABORATORY ANALYSIS E <br /> In accordance with County requirements;the four samples were analyzed for the following <br /> constituents: <br /> Analysis Method <br /> Total petroleum hydrocarbons as diesel Modified 8015 <br /> Total petroleum hydrocarbons as gasoline Modified 8015 <br /> Benzene, toluene, ethylbenzene, xylenes EPA 8020 i <br /> s I <br /> - Total nickel <br /> EPA 6010 <br /> ' Total chromium EPA 6010 ' <br /> The analytical results are presented in Table 1. <br /> i <br /> EVALUATION OF SOIL SAMPLING RESULTS <br /> Total petroleum hydrocarbons as both diesel and gasoline, and the petroleum hydrocarbon <br /> constituents benzene, toluene, ethylbenzene, and xylenes were reported to be below the <br /> analyzing laboratory's reporting limits in each of the samples submitted for analyses. <br /> Chromium and nickel were detected in low concentrations, well below the total threshold <br /> limit concentrations for each of these metals, which are 2,500 mg/Kg for chromium and <br /> 2,000 mg/kg for nickel. i <br /> I, <br />