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Table A-1 <br /> HVOC and AVOC Mass Estimation <br /> Tracy Railyard, Tracy, California <br /> HVOC Mass Estimation <br /> Depth Interval <br /> Interval Thickness Concentration Area Site Mass <br /> (ft) (ft) Figure/Area (mg/kg) (ft^2) Mass (lbs) Total (lbs) <br /> 0-5 5 A-1/A 10 1335.7 7.4 7.4 <br /> 0-5 5 A-1/13 10 4868.2 27.0 27.0 <br /> 0-5 5 A-1/C 10 397.4 2.2 2.2 <br /> 0-5 5 A-1/D 100 706.5 39.1 <br /> 0-5 5 A-1/1) 10 1457.1 8.1 47.2 <br /> 0-5 5 A-1/E 10 4500 24.9 24.9 <br /> 5.5-10 4.5 A-2/A 100 2826 140.8 <br /> 5.5-10 4.5 A-2/A 10 13114.3 65.4 206.2 <br /> 5.5-10 4.5 A-2/13 10 1865.6 9.3 9.3 <br /> 5.5-10 4.5 A-2/C 10 1335.7 6.7 6.7 <br /> 10.5-25 14.5 A-3/A 100 1335.7 214.5 <br /> 10.5-25 14.5 A-3/A 100 2483.8 398.8 <br /> 10.5-25 14.5 A-3/A 100 1335.7 214.5 <br /> 10.5-25 14.5 A-3/A 100 1096.9 176.1 <br /> 10.5-25 14.5 A-3/A 10 20016.7 321.4 1325.4 <br /> 10.5-25 14.5 A-3/13 100 397.4 63.8 <br /> 10.5-25 14.5 A-3/13 10 706.5 11.3 75.2 <br /> Total Mass HVOCs (lbs) 1647.6 <br /> AVOC Mass Estimation <br /> Depth Interval <br /> Interval Thickness Concentration Area Site Mass <br /> (ft) (ft) Figure/Area (mg/kg) (ft^2) Mass (lbs) Total (lbs) <br /> 0-10 10 A-4/A 10 620.9 6.9 6.9 <br /> 0-10 10 A-4/A 100 176.6 19.6 <br /> 0-10 10 A-4/B 10 529.9 5.9 25.4 <br /> 0-10 10 A-4/C 10 778.9 8.6 8.6 <br /> 0-10 10 A-4/1) 10 276 3.1 3.1 <br /> 10.5-20 9.5 A-5/A 1000 176.6 185.8 <br /> 10.5-20 9.5 A-5/A 100 220.8 23.2 <br /> 10.5-20 9.5 A-5/A 10 673.4 7.1 216.1 <br /> 10.5-20 9.5 A-5/B 1000 99.4 104.6 <br /> 10.5-20 9.5 A-5/13 100 441.5 46.4 <br /> 10.5-20 9.5 A-5/13 10 662.4 7.0 158.0 <br /> 10.5-20 9.5 A-5/C 10 397.4 4.2 4.2 <br /> Total Mass AVOCs (lbs) 422.3 <br /> Soil density is assumed to be 1.5 tons per cubic yard <br />