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Appendix B - Volume-Mass Calculations AGE Project No. 08-1633 Page 2 of 3 1) For the estimated inner zone (1,000 mg/kq contour area): Area = 630 ft2 and h = 20 ft V1,000 = 630 ft2 - 20 ft = 12,600 ft3 V,1,000 - typical weight of soil - average concentration of contaminant -4 12,600 ft3 - 100 Ibs/ft3 - 0.003275 -4 4,126 lbs of TPH-g 2) For the estimated middle zone (100-1,000 mg/kq contour area): Area = 914 ft2 and h = 20 ft V100 = 914 ft2 . 20ft - V1,000 V100 = 5,680 ft3 V100 - typical weight of soil - average concentration of contaminant 4 5,680 ft3 . 100 Ibs/ft3 . 0.000482 -4 273 lbs of TPH-g 3) For the estimated middle zone (1-100 mq/kq contour area): Area = 2,678 ft2 and h = 20 ft V1 = 2,678 ft2 - 20 ft- V100 V1 = 35,280 ft3 V1 - typical weight of soil - average concentration of contaminant -4 35,280 ft3 . 100 Ibs/ft3 . 0.000018 4 63 lbs of TPH-g ADSORBED SOIL PLUME MASS CALCULATIONS: TPH-q - 40 to 60 FEET BSG >1,000 mg/kg (inner zone): The sum of 132-40(1,000 mg/kg),MW3-45(1,800 mg/kg)and the 1,000 mg/kg contour line; average = 1,266 mg/kg (equivalent to 0.001266) 100-1,000 mg/kg (second inner zone): The sum of the 1,000 mg/kg contour line and the 100 mg/kg contour line; average= 550 mg/kg (equivalent to 0.000550). 1-100 mg/kg (outer zone): The sum of 135-45(7.8 mg/kg),MW1-45(2.3 mg/kg),MW1-55(2.5 mg/kg),EW2-45(5.7 mg/kg),EW2-60(6.0 mg/kg),MW5-45(4.4 mg/kg),MW7-48(1.2 mg/kg),MW9- 50 (1.0 mg/kg), MW9-60 (1.0 mg/kg), the 100 mg/kg contour line and the 1 mg/kg contour line; 12 average = 12 mg/kg (equivalent to 0.000012). 1) For the estimated inner zone (1,000 mg/kq contour area): Area = 472 ft2 and h = 20 ft V1,000 = 472 ft2 - 20 ft = 9,440 ft3 V,1,000 - typical weight of soil - average concentration of contaminant -4 9,440 ft3 - 100 Ibs/ft3 - 0.001266 -4 1,195 lbs of TPH-g 2) For the estimated middle zone (100-1,000 mg/kq contour area): Area = 713 ft2 and h = 20 ft V100 = 713 ft2 . 20 ft - V1,000 V100 = 4,820 ft3 Advanced GeoEnvironmental,Inc.