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COMPUTATION SHEET <br /> PROJECT TITLE ARCO Service Station 2076 PROJECT NO 20805-144 004 <br /> DESCRIPTION Mass of Petroleum Hydrocarbons in Soil SHEET 4 OF 5 <br /> PREP BY DATE CHKD BY DATE <br /> Mass of TPHG in the interval between 14 and 20 feet below ground surface <br /> Mass of TPHG = Sod Vol Density lb TPHG/lb soil <br /> (ft3) (pcf) <br /> 10,000 ppm contour line <br /> Mass TPHG = 190 100 001 <br /> Mass TPHG = 190 lbs within the 10,000 ppm contour line <br /> 1,000 ppm contour line <br /> Mass TPHG = 860 100 0 001 <br /> Mass TPHG = 860 lbs within the 1,000 ppm contour line <br /> 100 ppm contour lane <br /> Mass TPHG = 2604 100 00001 <br /> Mass TPHG = 260 lbs within the 100 ppm contour line <br /> 10 ppm contour line <br /> Mass TPHG = 1716 100 000001 <br /> Mass TPHG = 17 lbs within the 10 ppm contour line <br /> 1 ppm contour line <br /> Mass TPHG = 1764 100 0000001 <br /> Mass TPHG = 018 lbs within the 1 ppm contour line <br /> Total Mass TPHG = 304 lbs <br /> 14 to 20 ft <br /> H,/exceldat/arco/2076calc xis <br />