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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 ("Fable 5)and from field measurements collected during <br /> SVE remediation (Table 6),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/m3) <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 <br /> the approximate mass/volume of extracted gasoline hydrocarbons <br />' 1. 23 September 2004 to 25 October 2004 <br />' The average analytical TPH-g concentration for this time interval was determined to be 690 pg/1(09-23-04=280 ug/l <br /> and 10-25-04= 1100,ug/l ,avg - 690 ug/L) The average flow rates during this time was calculated at 0 22 inches <br /> of water or approximately 22 cubic feet per irunute(table 6),the operational period was equal to 768 hours of running <br />' time <br /> C � 690 ug/l=0 000690 kg/m' <br />' Q z 0 22 inches water z 22 ft3/min <br /> t= 768 hours (32 days operation) <br /> Converting Q to m3/hour yields <br />' Q= (22 ft'/min)•(60 imn/liour) •(0 0283168m'/ft3)= 37 4 m' <br /> /hour <br /> M= C• Q•t=(0 000690 kg/m') •(37 4 in'/hour) • (768 hours) = 19 8 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields <br />' 19 8 kg of gas • 2 2046 lbs of gas/kg of gas=43 7 lbs of gasoline <br /> 43 7 lbs gas/32 days= 1.37 lbs/clay <br /> Converting pounds of gasoline to gallons of gasoline yields <br /> I43 7 lbs of gas • 0 16 gal of gas/lbs of gas � 6 99 gallon of gasoline <br />