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Chevron/s. El Dorado <br /> August 1990 a <br /> cavat'on am lin Laboratory analyses of soil samples <br /> collected beneath the discovered tanks and in the vicinity of the <br /> southern pump islands (P-2 and P-3) were below figure 3 method <br /> detection limits (MDL) . The analytical results Of soil samples <br /> collected from the former tank pit (p_j, SW-1, <br /> SW-2, SW-3, and <br /> TP-J) indicated measurable concentrations of gasoline hydro- <br /> carbons. The soil samples collected from the former waste-oil <br /> pit (WO-18 WO-2, WO-3, and WO-4) contained measurable <br /> concentrations of total 0-41-and-grease. Concentrations of <br /> oil-and-grease in these samples ranged from non detectable (ND) <br /> to 21 ppm. <br /> The waste-oil pit samples were also analyzed for the <br /> presence of organic lead (Pb) concentrations and ethylene <br /> dibromide (EDB) concentrations. Analytical results for all of <br /> these samples were below laboratory detection limits for Pb and <br /> EDB. Laboratory results are included in the summary on Table 1 <br /> and the laboratory reports are included in Appendix A. sample <br /> locations are illustrated on Figure 4. <br /> All excavated soil was stockpiled on polyethylene liners on <br /> site and covared. During excavation, soils with non detectable <br /> analytical results were stockpiled separately from the impacted <br /> soils. <br /> Eoil Stocky[le Sampling. On March 29, 1990, twelve <br /> composite Samples were collected from the soil stockpiles for <br /> --laboratory--anal yses�---A­compos ite-sam-ple-iWI-is- <br /> �a�.iected for. <br /> approximately every So yd3 Of soil. Analytical res%its of the <br /> soil samples rear-orted that the average concentrat4on of TPH-as- <br /> gasoline was approximately 70 PPm- The laboratory reports are <br /> included in Appendix B. is. <br />