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Mass balance calculations for TPHg in sod <br /> (4/3)*(31416) r1 r2 * r3 <br /> volume of impacted sod <br /> (elipsoid)= 419 13 13 * 14 8 <br /> Volume of impacted sod = 10,480 ft' <br /> Average concentration of <br /> contaminant in soil = 1818 mg/kg <br /> Chemical TPH-g <br /> mass= 10,480 ft3 * 2832 L * 1 7 kg * 1,818 mg * 0011111 kg <br /> 7 L kg mg <br /> mass = 917 kg = 2,018 lbs <br /> Notes <br /> r1 and r2 denote one half the width of contaminant zone (26 ft), r3 denotes one half of thickness of contaiminant zone (29 5) <br /> Average concentration equals the mean concentration of TPHg in borings SB, SB2, and MW1 <br />