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COMPUTATION SHEET <br /> OJECT TITLE ARCO Service Station 6100 PROJECT NO 20805-152 008 <br /> SCRIPTION Mass of Petroleum Hydrocarbons in Sod SHEET 6 OF <br /> PREP BY MC DATE Jul 17 98 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 sod <br /> (ft3) (pcf) <br /> 1000 ppm contour Ione <br /> Mass BTEX = 13600 110 000164 <br /> Mass BTEX= 2453 lbs within the 100 ppm contour line <br /> 100 ppm contour lane <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 = Sod Vol Density Ib TPHG/lb sod <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 0000005 <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,/exceldat/arco/6100calc xls <br />