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A S S O C I A T E S I N C <br /> (6,000 u II + 6,700 u /I + 2,800 ug/1 + 6,200 u 11 = 5,425 ug/l TPHg is average influent concentration <br /> 4 <br /> ' The average effluent concentration of TPHg detected in ASI(s) while the pilot test was in <br /> operation is shown below <br /> ' = <br /> (1,900 ug/1 + 2,600 + 4,800 u /l +2,900 ug/1) = 3,050 ug/I TPHg is the average effluent concentration <br /> 4 <br />' Thus the in-well stripping efficiency for TPHg is f,��� <br /> - u <br /> _ F�� f <br /> 3,050 ug/1 Q 56- 1 = 44 % efficiency <br /> 5,425 ugll <br />' Using the same calculations for benzene yields <br /> = (900 u9/1 + 1,100 u./q I+460 ug/l + 870 ug/l) = 833 ug/I benzene is the average influent concentration <br /> 4 <br /> = 240 ug/1 + 430 ug/1 + 720 u /1 + 450 u /l) = 460 ugll benzene is the average effluent concentration <br /> 4 <br /> Thus the in-well stripping efficiency for benzene is 1 <br />' - 613 ug/I = 0 74- 1 = 45 % efficiency <br /> 833 ug/I <br />' Utilizing these in-well stripping efficiencies, ATC attempted to quantify the mass removed in <br /> vapor phase through correlation with the well head air emissions data The results of the well <br /> head air emissions data are summarized in Table 8 - no pre+esf c)&40- ._. kms ) -/ <br /> The vapor phase mass removal calculations were completed using the average air flow rate <br /> infected into the DDC well during the pilot test, 16 standard cubic feet per minute <br /> 16 ft3 x 28 27 Liters x 60 min x 24 hours = 651,341 Liters/day <br />' 1 min ft3 hr day <br /> Utilizing this air flow rate and the average laboratory results from vapor samples collected during <br /> the air sparge pilot test for TPHg yields <br /> = 160 m Im3 + 240 M/M3+210 mg/ml+ 70 m /m3 = 170 m Im3 TPHg is the average concentration <br /> 4 <br />' = 170 mg x m3 x ft3 = 0 17 mg/L <br /> m3 35 5 ft3 28 27 Liter <br /> w\I 63931reportslnfs doc 15 <br />