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M <br /> Appendix C - Volume-Mass Calculations <br /> AGE Project No . 99-0682 <br /> Page 4 of 4 <br /> 411000 = 70 ft2 • 7 ft = 490 ft3 <br /> V>1 ,000 • typical weight of soil • average concentration of contaminant =4 <br /> 490 ft3 • 100 lbs/ft3 • 0 . 00175 -4 85 lbs of TPH-g <br /> 2 ) For the estimated middle zone ( 100- 1 , 000 mq/kq contour area ) : <br /> Area = 308 ft2 and h = 8 ft <br /> V100 = 308 ft2 • 8 ft - V11000 <br /> V100 = 1 , 974 ft3 <br /> V100 • typical weight of soil • average concentration of contaminant -+ <br /> 1 , 974 ft3 • 100 Ibs/ft3 • 0 . 00055 -+ 108 lbs of TPH -g <br /> 3 ) For the estimated outer zone ( 1 - 100 mq/kq contour area ) : <br /> Area = 1 , 390 ft2 and h = 40 ft <br /> V1 = 1 , 390 ft2 • 40 ft - V100411000 <br /> V1 = 5M36 ft3 <br /> V1 • typical weight of soil • average concentration of contaminant -4 <br /> 53 , 136 ft3 • 100 Ibs/ft3 • 0 . 000027 -> 143 lbs of TPH -g <br /> All together, the weight of TPH-g equals : <br /> 85 lbs + 108 lbs + 143 lbs =4 336 lbs of TPH -g <br /> Converting pounds of TPH-g to volume (gallons) using density of TPH-g equal to <br /> 6 . 25 lbs/gal : <br /> 336 lbs _ 6 . 25 lbs/gal -> 53 gallons of TPH -g <br /> All together, combining all three discrete zones the total estimated weight of TPH-g <br /> equals: <br /> 1,296 lbs + 12, 073 lbs + 336 lbs 13, 705 lbs of TPH-g <br /> Converting pounds of TPH-g to volume (gallons) using density of TPH-g equal to <br /> 6. 25 lbs/gal: <br /> 13, 702 lbs + 6. 25 lbs/gal 2, 192 gallons of TPH-p <br /> Adrnneed GeoEnvil'onmenW, Inc. <br />