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iMASS-VOLUME CALCULATIONS OF EXTRACTED GASOLINE HYDROCARBONS <br /> IAssumptions <br /> • Utilizing analytical data collected from air samples (Table 3) and from field measurements collected during <br />' the SVE pilot test(Table 4),the volume of extracted gasoline hydrocarbons at the site can be approximated <br /> The hydrocarbon mass removed during the operating period can be calculated using the following equation <br /> M=C- Q • t <br /> where Mµcumulative mass recovered(kg) <br /> I C=vapor concentration(kg/a) <br /> Q=extraction flow rate(m'lhr) <br /> t=operational period <br /> The average inlet TPH- concentration and average flow rates during each time interval was utilized for calculator the <br /> g g g g S <br /> approximate mass/volume of extracted gasoline hydrocarbons <br /> ll April to 30 June 2000 <br /> 1) The average analytical TPH-g concentration for this time interval was determined to be 2,200 jig/l The average <br /> flow rate was calculated at 5 inches of water or approximately 125 cubic feet per minute,the operational period <br /> was equal to 1,220 hours of running time <br /> C = 2,200µg11=0 002200 kg/m' <br /> Q ; 5 inches water z 125 ft'/min <br />' t= 1,220 hours <br /> Converting Q to rn3/hour yields <br /> IQ=(125 ft'/mm) -(60 mu-1/hour) •(0 0283168m3/ft)=212 4 m'/hour <br /> M=C - Q• t=(0 002200 kg/m') •(212 4 a/hour) - (1,220 hours)=570 1 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields <br /> I 570 1 kg of gas• 2 2046 lbs of gas/kg of gas= 1,257 lbs of gasoline <br /> I <br /> I <br /> Converting pounds of gasoline to gallons of gasoline yields <br /> i+,257 atia of rdas _- n y v�gaal+0,.+c r.R�J,/ius v+r gas stevni. gals sAla WAjr aowxx". <br /> c <br /> I <br /> I � <br />