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APPENDIX C <br /> VOLUME-MASS CALCULATIONS OF EXTRACTED NNELL MOTOR LINEIFT HyDCKOC�ONS <br /> RIVER CITY PETROLEUM C <br /> Assumptions: ata <br /> • <br /> Utilizing field measurements collected during thee f extracted gasoline hydrocarbons atthe <br /> VE remediation( able 1), <br /> collected from air samples(Table 2):the volume <br /> site can be approximated. <br /> The hydrocarbon mass removed during the operating period can be calculated using the following <br /> equation: <br /> M= C • Q • t <br /> where: M= cumulative mass recovered(kg) <br /> C=vapor concentration(kghn) <br /> Q=extraction flow rate (m3/hr) <br /> t=operational period(hrs) <br /> The average inlet TPH-g concentration and average f extracted gasoline hydrocarbonset flow rates during each tie rval were <br /> utilized for calculating the approximate mass/volume <br /> 15 June to 28 July 2005 <br /> 1) The average analytical TPH-g concentration for this time interval was determined to be 455 µg/1 (06-14+ <br /> 07-28/2 = 250+660/2= 455 µg/1). The average flow rate was calculated at 295 cubic feet per minute <br /> (nomograph). The operational period was 1,053 hours; running time was reduced due to well installation <br /> (Table 1). <br /> C =455 µg/1=0.000455 kg/m' <br /> Q =295 ft/min <br /> t = 1,053 hours <br /> Converting Q to m'/hour yields: <br /> Q=(295 Wlmin)• (60 min/hour)• (0.0283168m/$3)=501 m3/hour <br /> M=C•Q•t=(0.000455 kg/m3)• (501 n?/hour)• (1,053 hours)=240 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields: <br /> 240 kg of gas•2.2046 lbs./kg=529 lbs of gasoline <br /> Converting pounds of gasoline to gallons of gasoline yields: <br /> 529 lbs.of gas• 0.16 gal of gas/lbs.of gas 84.67 gallons of gasoline <br /> • <br /> Advanced GcoEnvironmental,Inc. <br />