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1 <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 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/m') <br /> Q=extraction flow rate (m3/hr) <br />' t=operational period(hrs) <br /> The average unlet 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. 22 June 2004 to 22 July 2004 <br /> The average analytical TPH-g concentration for this time interval was determined to be 590,ug/1(06-22-04=960,ug/1 <br />' and 07-22-04=220 pg/1 , avg z 590,ug/L) The average flow rates during this time was calculated at 0 24 inches of <br /> water or approximately 25 cubic feet per minute(table 6),the operational period was equal to 720 hours of ruiuung time <br /> I C = 950,ug/1=0 000590 kg/m' <br /> Q � 0 24 inches water �; 25 ft3/min <br /> t=720 hours(30 days operation) <br /> Converting Q to m3/hour yields <br /> Q=(25 ft'/mui) -(60 nun/hour) -(0 0283168m'/ft3)=42 5 m3/hour <br />' M=C- Q- t=(0 000590 kg/m') -(42 5 m3/hour) - (720 hours) = 18 04 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields <br /> I18 04 kg of gas -2 2046 lbs of gas/kg of gas=39.78 lbs of gasoline <br /> 39 78 lbs gas/30 days=132 lbs/day <br /> Converting pounds of gasoline to gallons of gasoline yields <br /> I39 78 lbs of gas - 0 16 gal of gas/lbs of gas = 6.36 gallon of gasoline <br /> I <br />