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s <br /> • � it <br /> f <br /> Mr. John Randall <br /> { � April 20, 1990 <br /> Paae 2 <br /> P-2, respectively on Figure 1) . The final dimensions of the main <br /> pit (p-1) excavation were approximately 30 to 80 feet in length <br /> in a north/south direction, 20 to 60 feet in length in an east/ <br /> west direction, and 8 to 20 feet deep. The final dimensions of <br /> P-2 (the Waste Oil Pit) were approximately 20-feet by 10-feet by <br /> 10-feet deep. The soils west of, and beneath, the approximate <br /> locations of the two previously existing southern pump islands <br /> were examined using a backhoe. During the January 29,1990 <br /> excavation, two tanks were encountered to the west of the <br /> pr!--vious tank excavation whose existence had not been documented. <br /> These tanks were removed on February 9,1990. The loc--tions of <br /> the final excavations are shown on Figure 1. <br /> Soils beneath the discovered tanks and in the vicinity of the <br /> t " <br /> southern tank islands were not impacted. The soils analyzed from <br /> the former tank pit contained measurable concentrations of <br /> gasoline hydrocarbons. The samples collected from the former <br /> waste-oil pit contained measurable concentrations of Total Oil <br /> and Grease. Concentrations of oil-and-grease in these samples <br /> ranged from ND to 21 ppm. <br /> The waste-oil pit samples were also analyzed for organic lead <br /> F (Pb) concentrations and ethylene dibromide (EDB) concentrations. <br /> Analytical results for all of these samples were below laboratory <br /> detection limits for Pb and EDB. Laboratory results are included <br /> in the summary on Table 1 and the laboratory reports are <br /> attached. Sample locations are illustrated in Figure 1. <br /> GROVNIACaTF.N <br /> TECNxotncy,INC. <br />