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Mass-Volume Calculations Of Extracted Gasoline Hydrocarbons <br /> SIERRA LUMBER-375 West Hazelton Avenue, Stockton, CA <br /> 1 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 gasohne 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/m3) <br />' Q=extraction flow rate(m3/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. 11 June 2002 to 17 July 2002 <br /> The average analytical TPH-g concentration for this tune interval was determined to be 6 10,ug/1(06-11-02= 120,ug/L <br /> and 07-17-02= 1,100,ug/L,avg =610,ug/L) The average flow rates during tlus time was calculated at 0 73 inches of <br /> water or approximately 47 cubic feet per minute(table 6),the operational period was equal to 864 hours of running time <br /> C 610 ug/1=0 000610 kg/m' <br /> Q 0 73 inches water �z 47 ft/mm <br /> t= 864 hours <br /> Converting Q to m3/hour yields <br /> Q=(47 ft'/min) •(60 min/hour)•(0 0283168m3/ft)=79 85 rn3/hour <br /> M =C • Q • t=(0 000610 kg/m3) •(79 85 m3/hour) • (864 hours)=42 08 kg of gasoline <br /> Converting kg of gasoline to pounds of gasohne yields <br /> 42 08 kg of gas• 2 2046 lbs of gas/kg of gas=92 77 lbs of gasoline <br /> Converting pounds of gasoline to gallons of gasolme yields <br /> 92 77 lbs of gas • 0 16 gal of gas/lbs of gas = 14.84 gallons of gasoline <br /> 1 <br /> I <br />