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COMPUTATION SHEET <br /> KOJECT TITLE ARCO Service Station 6100 PROJECT NO 20805-152 008 <br /> SCRIPTION Mass of Petroleum Hydrocarbons in Soil SHEET 6 OF <br /> PREP BY MC DATE 8116199 CHKD BY DATE <br /> Mass of BTEX in the interval between 46 and 65 feet below ground surface <br /> Mass of BTEX= Soil Vol Density Ib TPHG/lb soil <br /> (ft3) (pcf) <br /> 1000 ppm contour line <br /> Mass BTEX 13600 110 000164 <br /> Mass BTEX= 2453 lbs within the 100 ppm contour line <br /> 100 ppm contour line <br /> Mass BTEX 34800 110 000058 <br /> Mass BTEX= 2220 lbs within the 100 ppm contour line <br /> 10 ppm contour line <br /> Mass BTEX= 72600 110 0000039 <br /> Mass BTEX 311 lbs within the 10 ppm contour line <br /> 1 ppm contour line <br /> Mass BTEX 115000 110 0000002 <br /> Mass BTEX 25 lbs within the 1 ppm contour line <br /> 5010 lbs of BTEX <br /> Mass of BTEX in the interval between 66 and 85 feet below ground surface <br /> Mass of BTEX = Soil Vol Density lb TPHG/Ib soil <br /> (ft3) (pcf) <br /> 100 ppm contour line <br /> Mass BTEX 10520 110 0000520 <br /> Mass BTEX= 602 lbs within the 100 ppm contour line <br /> 10 ppm contour line <br /> Mass BTEX= 9080 110 0000050 <br /> Mass BTEX 50 lbs within the 10 ppm contour line <br /> 1 ppm contour line <br /> Mass BTEX 13400 110 0 000005 <br /> Mass BTEX 7 lbs within the 1 ppm contour line <br /> 659 lbs of BTEX <br /> 17,491 pounds BTEX calculated for in place mass <br /> H,Iexceldatlarco16100calc As <br />