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Table 1 <br /> Initial Hydrocarbon Mass in Soil Calculations(1987-1993) <br /> ARCO Station No 2093 <br /> 3425 Tracy Blvd <br /> Tracy, California <br /> Soil[Vadose Contaminant Interval <br /> Radius of Zone Actual Sod Inscribed Interval Sod Soil Interval Soil Concentration Contaminant <br /> Area Area Thickness Volume Volumes Volume Density Mass in Soil Mass in Soil <br /> feet (sq feet) (feet Porosi (ft') ft3 * (ft, Ibs/ft3) (lbs) (ppm (lbs) <br /> TPH <br /> 1200 45238 800 035 2,35240 2,35240 12000 282,288 02 2,00000 56458 <br /> 3200 3,21696 800 035 16,728 18 2,35240 14,375 78 12000 1,725,093 43 1,00000 1,72509 <br /> 5400 9,16079 800 035 47,636 10 16,728 18 30,907 92 -12000 3,708,950 87 50000 1,85448 <br /> 7200 16,285 85 800 035 84,686 4Q 47,63610 37,050 30 120 00 4,446,036 24 5000 22230 <br /> Total GRo 4,144.14 <br /> Benzene <br /> 1500 70685 To 0 0 35 3,675631 3,67563 120 00 441,075 02 2 20 0 97 <br /> 41 00 5,280 96 8 00 0 35 27,461 00 3,675 63 23,785 38 120 00 2,854,245 49 1 00 2 85 <br /> 82 00 21,123 85 8 00i 035 109,844021 27,461 00 82,38-401 120 00 9,885,961 54 010 0 99 <br /> Total Benzene 4.81 <br /> MtBE Data unavailable <br /> 000 000 000 035 000 000 12000 000 000 00 <br /> 000 000 000 035 000 0 00 000 12000 000 000 000' <br /> 000 000 000 035 000 000 000 12000 000 000 000 <br /> 000 0001 000, 035 000 000, 000 120001 000, 000 000 <br /> Total MtBE 000 <br /> *Optional for inscribed/concentric concentration intervals to eliminate repeat counting of inner volumes <br /> Bold Text in column title indicates user defined fields <br />