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s s s <br /> Project No 91-246 <br /> 620 W. Charter Way <br /> Stockton, California <br /> By: Sudhakar Talanki <br /> Date: January25, 1993 <br /> Objective Example TPH Extraction Calculation <br /> Given: <br /> Airflow rate = 1 i8 8 cubic feet per minute (cfm) <br /> Temperature = 50° F = 5100 Rankine (R) <br /> TPH concentration = 1,867 parts-per-million volume <br /> Assumptions <br /> Molecular weight of TPH, as hexane, is 86.18 lb/lb mole <br /> Molar volume of a gas is 386.73 W'/lb mole (70° F) <br /> Calculation: <br /> TPH extraction (lbs/day) <br /> = airflovr x concentration x temperature correction x molecular weight x time conversion <br /> = 116 8 ft, 1,867 ft' TRH 530° R 86.18 lb 1,440 min <br /> x x x <br /> min 10& tt' Air 386.73 ft'/ib mole (510° R) lb mole day <br /> TPH extraction = 73.96 lbs/day <br /> i <br />