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' Mass-Volume Calculations Of Extracted Gasoline Hydrocarbons <br /> • SIERRA LUMBER-375 West HazeIton Avenue, Stockton, CA <br /> IAssumptions <br /> • Utilizing analytical data collected from air samples (Table 6) and from field measurements collected during <br />' SVE remediation(Table 7), the average concentration of extracted gasoline hydrocarbons at the site can be <br /> approximated <br /> Z he hydrocarbon mass removed during the operating penod 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(rn/hr) <br /> t=operational period(hrs) <br /> The average mlet TPH-g concentration and average flow rates during each time interval were utilized for calculating the <br /> approximate muss/volume of extracted gasoline hydrocarbons <br /> I t. 28 January 2004 to 23 ]February 2004 <br /> The average analytical TPH-g concentration for flus tine interval was determined to be less than 50,ugll(01-28-04= <br /> ND<50,ugli and 02-23-04=ND<50,avg = 50,ug/L) The average flow rates during this time was calculated at 1 08 <br /> inches of water or approximately 54 cubic feet per minute (table 7), the operational period was equal to 624 hours of <br /> running time <br /> C z 50,ug/1=0 000050 kg/m3 <br /> Q = 1 08 inches water = 53 R3 <br /> /mm <br /> t=624 hours(26 days operation) <br /> Converting Q to m'/hour yields <br /> IQ=(53 #13/mm)•(60 nun/hour)•(0 0283168m3/fV)=90 05 m3/hour <br /> M=C • Q• t=(0 000050 kg/m3) •(90 05 m'/hour) • (624 hours)=2 81 kg of gasoline <br /> IConverting kg of gasoline to pounds of gasoline yields <br /> 2 81 kg of gas • 2 2046 lbs of gas/kg of gas=6.19 lbs of gasoline <br /> 6 19 lbs gas/26 days=0 241bslday <br /> IConverting pounds of gasoline to gallons of gasoline yields <br /> 6 19 lbs of gas • 0 16 gal of gas/lbs of gas = 1 gallon of gasoline <br /> 1 <br />