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ME <br /> TANK CLOSURH REPORT <br /> 620 West Charter Way,Stockton, California <br /> Delta Project No.40.88-586 <br /> Page 6 <br /> TABLE 1 <br /> Former Tank Excavation Soil Samples <br /> Concentrations in mill;,rams per kilogram (equivalent to parts per million) <br /> Sample Depth (feet Ethyl- Organic <br /> Nn. below erade) TPH' Benzene Toluene benzene Xylenes Lead <br /> N. End 14 3,200 66 170 74 320 .b <br /> Tank 1 <br /> S. End 14 1.4 0.22 0.074 <0.05 0.098 --- <br /> Tank 1 <br /> N. End 14 4.2 0.053 0.071 0.092 0.53 <5.0 <br /> Tank 2 <br /> S. End 14 1.4 ¢0.05 0.065 <0.05 0.087 <5.0 <br /> Tank 2 <br /> N. End 14 6,100 97 200 100 550 --- <br /> Tank 4 <br /> S. End 14 3,700 29 120 48 236 --- <br /> Tank 4 <br /> NE Corner 19.5 7,100 110 290 100 500 --- <br /> Old Excay. <br /> NOTES: <br /> 'Total Petroleum Hydrocarbons as gasoline. <br /> I'Not analyzed for this constituent. <br /> w, The former tank excavation was backfilled on Noveml ar 24, 1989, following receipt of all the laboratory <br /> results. Clean, imported fill material was used to backfill the excavation. Petroleum constituents <br /> remaining in soils underlying the excavation will be remediated by methods othcr than excavation. <br /> 4.4 Product Llne SamallnE <br /> Three product lines supplied the two former pump islands. On November 14, 1989, the three sets a1 <br /> product lines were excavated. Soils rentaved from these trenches were screened with a PID and stockpiled <br /> according to PID readings. Three soil samples collected from a depth of 3 feet below grade in these <br /> f, <br /> r' <br />