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COMPUTATION SHEET <br /> IROCRIPTION <br /> JECT TITLE ARCO Service Station 6100 PROJECT NO 20805-152 008 Mass of Petroleum Hydrocarbons in Soil SHEET 3 OF _ <br /> PREP BY MC DATE Jul 17 98 CHKD BY DATE <br /> Mass of TPHG En the interval between 46 and 65 feet below ground surface <br /> Mass of Soil Vol Density Ib TPHG/lb soil <br /> (ft3) (pcf) <br /> 10000 ppm contour line <br /> Mass TPHG = 11800 110 00100 <br /> Mass TPHG= 12980 lbs within the 10000 ppm contour line <br /> 1000 ppm contour line <br /> Mass TPHG = 84200 110 00043 <br /> Mass TPHG= 'r-1 39364 lbs within the 1000 ppm contour Ione <br /> 100 ppm contour line <br /> Mass TPHG= 44380 110 0 00050 <br /> Mass TPHG= 2441 lbs within the 100 ppm contour line <br /> 10 ppm contour line <br /> Mass TPHG= 72320 110 0000016 <br /> Mass TPHG= 127 lbs within the 10 ppm contour line <br /> 1 ppm contour line <br /> Mass TPHG= 133880 110 0000004 <br /> Mass TPHG= 59 lbs within the 1 ppm contour line <br /> 54971 pounds between 46 and 65 ft <br /> Mass of TPHG in the interval between 66 and 85 feet below ground surface <br /> Mass of Soil Vol Density Ib TPHG/lb soil <br /> (ft3) (pcf) <br /> 1000 ppm contour line <br /> Mass TPHG = 75700 110 00048 <br /> Mass TPHG= 39970 lbs within the 1000 ppm contour line <br /> 100 ppm contour line <br /> Mass TPHG= 63980 110 000033 <br /> Mass TPHG= 2322 lbs within the 100 ppm contour line <br /> 10 ppm contour line <br /> Mass TPHG= 91680 110 0000047 <br /> Mass TPHG= 474 lbs within the 10 ppm contour Ione <br /> 1 ppm contour line <br /> Mass TPHG= 78200 110 0000006 <br /> Mass TPHG= 55 lbs within the 1 ppm contour line <br /> 0 42821 pounds between 66 and 85 ft <br /> I <br /> 228,974 pounds TPHG calculated for mass in place <br /> H,/exceldat/arco/6100calc xis <br />