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Project No. 91-246 <br /> 620 W. Charter Way <br /> Stockton, California <br /> By: Sudhakar Taianki <br /> Date: January 25, 1993 <br /> Objective: Example TPH Extraction Calculation <br /> Given: <br /> i <br /> Airflow rate = 118.8 cubic feet per minute (cfm) <br /> Temperature= 50° F = 510° Rankine (R) <br /> TPH concentration = 1,867 parts-per-million volume <br /> Assumptions. <br /> Molecularweight of TPH, as hexane, is 86.18 lb/Ib mole <br /> Molar volume of a gas is 386.73 ft3/Ib mole (70° F) <br /> Calculation: <br /> TPH extraction (lbs/day) <br /> = airflovi x concentration x temperature correction x molecular weight x time conversion <br /> = 118.8 ft3 1,867 ft3 TPH 5300 R 86.18 lb 1,440 <br /> x x x <br /> min 106 ft3 Air 386.73 ft3/Ib mole (5100 R) lb mole day <br /> TPH extraction = 73.96 lbs/day <br />