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I <br />' 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 /> 1 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. 23 June 2003 to 24 July 2003 <br /> l <br /> The average analytical TPH-g concentration for this time interval was determined to be 138 5 pg/1(06-23-03=250 pg/1 <br /> ie and 07-24-03 =27 ug/L, avg — 138 5,ug/L) The average flow rates during this time was calculated at 0 375 inches of <br /> water or approximately 33 5 cubic feet per minute(table 6), the operational period was equal to 744 hours of running <br /> time <br /> C = 138 5 pg11=0 0001385 kglm' <br /> Q = 0 375 inches water = 33 5 ft'/min <br /> t=744 hours(3 t days) <br /> Converting Q to m'/hour yields <br /> Q=(33 5 ft'/min) •(60 min/hour)-(0 0283168m'/ft')=56 92 m'/hour <br /> M=C • Q- t=(0 0001385 kg/m')•(56 92 m'/hour)• (744 hours)=5 87 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields <br />' 5 87 kg of gas • 2 2046 lbs of gas/kg of gas= 12 93 lbs of gasoline <br /> 12 93 lbs gas/26 days=0 42 lbs/day <br /> Converting pounds of gasoline to gallons of gasoline yields <br /> 12 93 lbs of gas • 0 16 gal of gas/lbs of gas z 2 07 gallons of gasoline <br /> r <br />