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t <br /> r <br /> ESTIMATED HYDROCARBON MASS <br /> i (IMPACTED SOIL) REMOVAL <br /> r Based on the hydrocarbon concentration of total petroleum hydrocarbons quantified as gasoline <br /> (TPH-g) in excavated UST removal excavation samples, stockpile soil samples and the average <br /> concentration of TPH-g in soil at the base of the over excavation, the following calculation for the <br /> iremoved TPH,g mass has been made <br /> The impacted soil from the soil stockpile and UST excavation had the following concentrations <br /> r * UST removal samples T#2-EA-14' (1 I nV)kg) and T#2-EB-14' (1,100 mg/kg), <br /> * Over excavation samples Floor S (9 9 mg/kg) and Floor N(4 2 mg/kg) and, <br /> i * Over excavation soil stockpile SP2A-B (120 mg/kg), SP2C-D (420 mg/kg) and SP1A-B <br /> (<1 0 mg/kg), <br /> This mass reduction was calculated from soil sample data and the weight of the soil stockpiled from <br /> i the excavations A total of 639 tons of impacted soil were disposed with an average concentration <br /> of 256 milligrams per kilogram of gasoline <br /> r• weight <br /> 639 tons removed • 2000 pounds/ton= 1,278,000 pounds soil <br /> i1,278,000 pounds soil • 0 454 kilograins/lbs = 580,212 kilograms soil <br /> i580,212 kilograms soil • 256 mg/kg of gasoline = 148,534,272 milhgrams of gasoline <br /> 148,534,272 milligrams of gasoline— 1,000 nnlligrain/grams = 148,534 grams of gasoline <br /> r148,534 grams of gasoline 1,000 gram/kilograms = 149 kilograms of gasoline <br /> t <br /> volume <br /> 148,534 grams of gasoline— 0 74 grams/cm = 200,722 cm3 of gasoline <br /> i (200,722 cm3 of gasoline— 3,785 cm3/gallon) = 53 gallons of gasoline removed <br /> i <br /> i <br /> I <br />