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t <br /> ETS ENVIRONMENTAL <br /> T.D. ,PAGE 3 <br /> r <br /> h <br /> TABLE 3 <br /> SOIL ANALYSES ' . <br /> (RESULTS IN PPM) <br /> OIL&GREASE STCL LEAD <br /> --------- --- --- <br /> 202-0957 1, 300 0.069 (West) <br /> 202-0959 N.D. 3 .6 (North) <br /> 202-0960 300 0.084 ( South) <br /> TOTAL LEAD <br /> 203-0120 ND 4 .3 (Bottom) <br /> r <br /> 203-0121 ND 2 . 3 . (East) <br /> Analytes reported as ND were not above stated limits- of detection <br /> Oil andrease contaminates are isolated in approximate <br /> 9 PP <br /> six inch lens within 'the hardpan of. the west and south walls. <br /> ' The lens is estimated to pinch out within two feet- of where <br /> the excavation stopped. Oil and' gr'ease inherently; are low <br /> mobility contaminates, especially in hardpan and the clay <br /> plug of the excavation. The group& water table is estimated <br /> to be at 60 to 65 feet below the surface in this area. The <br /> ' contaminates remaining in-place are not estimated to be a <br /> threat to ground water quality. <br /> Volume of the lens is calculated below. <br /> Dimension of lens; <br /> West: base * height * length or ..5 ' * 2 ' * 5 ' = -5.0 cu ft - <br /> South: base * height * length or .'5 ' * 2 ' * 5' = 5 .D cu f't <br /> Total volume: 5 .0 ' cu .+ 5.0' cu = 10' cu or 0.37 yd cu <br /> Weight: 0. 37 yd cu * 3000 lb. /yd cu = 1110 ib <br /> 1110 lb / 2 .2 lb/kg. _ :504 kg <br /> Contamination oil & grease: 800 mg/kg cont. * .504 :;kg soil = <br /> 403 .2 g, 403 .2 g / 448 g/lb = . 88 'lb or . 12 gallons <br />