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' Mass-Volume Calculations Of Extracted Gasoline Hydrocarbons <br /> SIERRA LUMBER- 375 West Hazelton Avenue, Stockton, CA <br /> Assumptions <br />' Utilizing analytical data collected from air samples(Table 4)and from field measurements collected during the <br /> SVE pilot test (Table 5), the average concentration of extracted gasoline hydrocarbons at the site can be <br /> approximated <br />' The hydrocarbon mass removed during the operating period can be calculated using the following equation <br />' M=C• Q• t <br /> where M=cumulative mass recovered(kg) <br /> C=vapor concentration(kg/m') <br />' Q=extraction flow rate(m'/hr) <br /> t=operational period(hrs) <br />' The average inlet TPH-g concentration and average flow rates during each time interval were utilized for calculating the <br /> approximate mass/volume of extracted gasoline hydrocarbons <br />' 1. 17 December 2002 to 27 January 2003 <br /> l <br /> The average analytical TPH-g concentration for this time interval was determined to be 234,ug/l(12-17-02=400#g/L <br /> ie and 01-27-03=67,ug/L,avg =234 pg/L) The average flow rates during this time was calculated at 0 43 inches ofwater <br /> or approximately 36 cubic feet per minute(table 6), the operational period was equal to 744 hours of running time <br />' C = 234,ug/1=0 000234 kg/m' <br /> Q = 0 43 inches water = 36 fig/min <br /> t=744 hours <br /> Converting Q to m'/hour yields <br /> Q=(36 ftp/min)•(60 nun/hour)•(0 0283168m'/ft)=61 16 m3/hour <br /> M=C • Q• t=(0 000234 kg/m') •(61 16 m3/hour) • (744 hours)= 10 65 kg of gasoline <br /> IConverting kg of gasoline to pounds of gasoline yields <br /> 10 65 kg of gas• 2 2046 lbs of gas/kg of gas=23.48 lbs of gasoline <br /> IConverting pounds of gasoline to gallons of gasoline yields <br /> 23 48 lbs of gas • 0 16 gal of gas/lbs of gas = 3.76 gallons of gasoline <br /> I <br /> I <br />