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INTERNATIONAL TECHNOLOGY CORPORATION <br /> 1991, two soil samples (Appendix D) were collected by driving the sampler directly into the <br /> stockpile. Samples were analyzed by Precision Analytical for the same methods tested in <br /> _ Section 2.1.2 including the fish toxicity (B & C Analytical and metals test for self <br /> certification. <br /> 2.3.4 Soil Sample Analyses - Oil/Water Separator and Oil/Water Separator <br /> Stockpile <br /> Analytical results of the initial sample, 112191SS1, revealed the presence of only oil and <br /> grease (90 ppm). Although detectable concentrations of metals were encountered, none were <br /> greater than the California Title 22 TTLC's and only one (1.8 ppm cadmium) was greater <br /> than the STLC's (STLC for cadmium 1.0 ppm). <br /> Soil samples, collected after over excavation was completed, were analyzed by Precision <br /> Analytical Laboratory for oil and grease and metals only, since these were the only <br /> contaminants encountered in the original sample. Analytical results revealed oil and grease <br /> concentrations ranging from 50 - 90 ppm. No metals were detected above Title 22 STLC <br /> values. Analysis of the soil sample collected from the pit bottom (following over excavation <br /> revealed the presence of 55 ppm oil and grease. No metals were detected above Title 22 <br /> STLC values (Table 3A). <br /> Soil stockpile samples were analyzed by the same methods as the original pit sample. <br /> Analytical results revealed the presence of oil and grease at 195 ppm, diesel at 1.6 ppm. No <br /> metals were detected above Title 22 TTLC values (Table 3B). <br /> 2.3.5 Oil/WAter Separator Stockpile Disposal <br /> Approximately 25 yds of soil were transported from the site on December 12, 1991 by <br /> Conrad & Son to the BFI landfill in Livermore, California. A copy of the non-hazardous <br /> - manifest is included in Appendix J. <br /> 2.3.6 Oil/Water Separator Excavation Backfill <br /> On December 4, 1991, following the approval of Mike Higgins of the RWQCB - Central <br /> Valley Region, the excavation was backfilled with clean material (from the new tank <br /> excavation) to grade level (Appendix K). <br /> 2.4 New Tank Excavation <br /> The new tanks were installed in the northwest comer of the site on November 11, 1991. No <br /> petroleum odor or staining was encountered in the new tank excavation. The clean fill <br /> M401-06-92JUST/0054MER 7 <br />