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MASS REMOVAL RATE CALCULATIONS <br /> TPH-g Mass Removal Rate Calculations <br /> a Assume molecular weight (MW) for TPH-g is approximately 100 <br /> (MW=100), and assume at standard temperature and pressure (293 K, <br /> 1 atmosphere) the TPH-g vapor density is approximately 0 278 lb/ft3 <br /> and vapor density for benzene is approximately 0 217 lb/ft3 at STP <br /> TPH-g Mass Removal Rate Calculations - Well W-1 <br /> TPH-g influent rate = (12 5 cfm) (763 ppmv/lx6) <br /> _ (0 0095 cfm TPH-g influent vapor) x (0 278 lb/ft) <br /> _ (0 0027 lb TPH-g vapor/min ) x (1440 min/day) <br /> = 3 8 lbs TPH-g vapor/day influent <br /> TPH-g Mass Removal Rate Calculations - Well W-2 <br /> TPH-g influent rate = (12 6 cfm) (7240 ppmv/1x6) <br /> _ (0 091 cfm TPH-g influent vapor) x (0 278 lb/ft) <br /> = (0 025 lb TPH-g vapor/min ) x (1440 nun/day) <br /> 36 5 lbs TPH-g vapor/day influent <br /> TPH-g Mass Removal Rate Calculations - Well W-3 <br /> TPH-g influent rate = (19 9 cfm) (179,000 ppmv/lx6) <br /> = (3 56 cfm TPH-g influent vapor) x (0 278 lb/ft) <br /> (0 99 lb TPH-g vapor/min ) x (1440 min/day) <br /> 1,425 lbs TPH=g vapor/day influent <br /> TPH-g Mass Removal Rate Calculations - Well W-4 <br /> TPH-g influent rate = (13 7 cfm) (3,130 ppmv/1x6) <br /> _ (0 043 cfm TPH-g influent vapor) x(0 278 lb/ft) <br /> _ (0 012 lb TPH-g vapor/mm ) x (1440 nun/day) <br />