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i <br /> APPENDIX E <br /> Page 2 of 3 <br /> Where a, b and c = short, intermediate and long semi-axes <br /> The weight(wt) of PHI soil can be calculated by <br /> wt gasoline = 125 Ib/ft3.(V, +V2)•C <br /> Where lb/ft' =pounds per cubic foot <br /> C =concentration of gasoline (TPH-g) in soil in milligrams per <br /> kilograms (mg/kg) <br /> The following calculations for the remaining petroleum hydrocarbon-impacted soil were made <br /> Area A <br /> Area of impacted soil beneath excavation in Area A = 1553 ft' <br /> I Thickness = 2 0 ft <br /> Semi-axial dimensions of impacted area southeast of excavation a= 2 0 ft, b = 7 2 ft, c — 15 9 ft <br /> Volume of PHI soil (Area A) = 1514 ft3 <br /> 10 Average concentration of TPH-g= 1,425 mg/kg <br /> Weight of gasoline in Area A = 255 lb TPH-g <br /> Sample Calculations <br /> I wt gasoline = 125 ip/ft=(V, + VZ)•C <br /> = 125 lb/W-C/3-A-h T 2i3--ji- -b°c)°C <br /> = 125 lb/ft -(1035 fr+ 479 ft)-1,425 mg/kg <br /> I = 265 1b TPH-g <br /> I Area B <br /> I Area of impacted soil beneath excavation in Area B =2280 ft2 <br /> Thickness =3 0 ft <br /> Semi-axial dimensions of impacted area southeast of excavation a=2 2 ft, b = 13 3 ft, c =21 5 ft <br /> I Volume of PHI soil (Area B - Area A) = 2,938 ft' - 1,514 ft' = 1,424 ft' <br /> Average concentration of TPH-g= 550 mg/kg <br /> Weight of gasoline in Area B = 98 lb TPH-g <br /> 0I <br /> Advanced GeoEnvironmental,Inc <br />