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�T <br /> MASS CALCULATIONS OF <br /> EXTRACTED HYDROCARBONS (Gasoline) <br /> ' Chapin Bros , Inc <br /> 1766 Monte Diablo Avenue, Stockton, California <br /> ' The hydrocarbon mass removed during the operating period can be calculated using the following <br /> equation M = C•Q•t <br /> ' where M= cumulative mass recovered (kg) <br /> C = vapor concentration (kg/m3) <br /> ' Q= extraction flow rate (m3/hr) <br /> t= operational period (hrs) <br /> ' 41 April to 14 June 1998 <br /> using C = 1,000 and 52/2 gg11 = 0 0005 kg/m3 <br /> Q= 150 cfm average = 88 2 m3/hr <br /> t = 827 hrs operation <br /> 0 0005 - 88 2 • 827 = 38 kg of gasoline <br /> - 34 kg • 2 2046 lbs/kg = 84 lbs of gasoline <br /> to convert lbs of gasoline to gallons of gasoline, use 0 16 gal/lbs <br /> 84 lbs of gal - 0 16 gal/lbs = 13.5 gallons of gasoline <br /> Time Frame C Q t Gallons <br /> (,ug/1) average to (m3/hr) (hours) Removed <br /> kg/m3 <br /> 04-01-98 toT 1000 -52/2= 882 824 135 <br /> 06-04-97 00005 <br /> ' Total of 13 5 gallons of gasoline (TPH-g) were removed <br /> 1 <br /> Advanced GeoEnvironmental,[ne <br />