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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(Table 4) and from field measurements collected during <br /> the SVE pilot test(Table 5), the average concentration of extracted gasoline Hydrocarbons at the site can be <br /> approximated <br />' The hydrocarbon;Hass 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 <br /> the approximate mass/volume of extracted gasoline hydrocarbons <br /> 1 13 September to 15 October 2001 <br />' The average analytical TPH-g concentration for this time interval was determined to be 650 ug/1(09-13-01=780µg/L <br /> and 10-15-01 =520 gg/L, avg =650,ugl L) The average flow rates during this time was calculated at 0 35 inches of <br /> water or approximately 29 cubic feet per minute(table 5),the operational period was equal to 768 hours of running time <br /> C = 650 ugll=0 000650 kg/m' <br /> Q z 0 35 inches water = 34 ft' <br /> /min <br /> t=768 hours <br /> Converting Q to rri'/hour yields <br /> Q=(34 ft'/mum) •(60 n uiihour) •(0 0283168m'/ft') =57 76 m'/hour <br /> M=C • Q • t=(0 000650 kg/m') •(57 76 m'/hour) • (768 hours)=28 83 kg of gasoline <br /> Converting kg of gasoline to pounds of gasoline yields <br /> 28 83 kg of gas • 2 2046 lbs of gas/kg of gas= 63 57 lbs of gasoline <br /> Convening pounds of gasoline to gallons of gasoline yields <br /> 63 57 lbs of gas • 0 16 gal of gas1lbs of gas H 10 17 gallons of sasohne <br /> r� <br />