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i COMPUTATION SHEET <br /> IRROJECT TITLE Safeway Stockton - 1111 Navy Drive PROJECT NO 22794-100 001 <br /> DESCRIPTION Mass of Petroleum Hydrocarbons in Soil & Groundwater SHEET 2 OF _4 <br /> PREP BY DATE CHKD BY DATE <br /> Mass of TPHD in the interval between 12 and 20 feet below ground surface <br /> Mass of TPHD = Sod Vol Density lb TPHD/Ib soil (avg conc ) <br /> (ft3) (pcf) <br /> 1,000 ppm contour line <br /> Mass TPHD = 1120 100 00037 <br /> Mass TPHD = 414 lbs within the 1,000 ppm contour line <br /> 100 ppm contour line <br /> Mass TPHD = 3480 100 0000574 <br /> Mass TPHD = 1998 lbs within the 100 ppm contour line <br /> 10 ppm contour line <br /> Mass TPHD = 14600 100 0000042 <br /> Mass TPHD = 61 3 lbs within the 10 ppm contour line <br /> 675 lbs TPHD between 12 and 20 feet bgs <br /> Mass of TPHD in the interval between 20 and 30 feet below ground surface <br /> 1,000 ppm contour line <br /> Mass TPHD = 3750 100 0001613 <br /> Mass TPHD = 6049 lbs within the 1,000 ppm contour line <br /> 100 ppm contour line <br /> Mass TPHD= 6225 100 000021 <br /> Mass TPHD = 13073 lbs within the 100 ppm contour line <br /> 736 lbs TPHD between 20 and 30 feet bgs <br /> 1411 Ibs TPHD �n site sods <br /> H,Iexceldatlarco12076calc As <br />