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MASS/VOLUME CALCULATIONS OF <br /> . EXTRACTED HYDROCARBONS (VOCs) <br /> FIRE STATION #2 <br /> 110 West Sonora Street, 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/m') <br /> Q = extraction flow rate (M3/hr) <br /> t= operational period(hrs) <br /> The calculation for the first time period is provided as an example for the determination of mass/ <br /> volume of hydrocarbons removed over the reporting period <br />' 11-05-01 to 12-10-01 <br /> using C = (1,400 + 810 µg/1)— 2 = 0 0011 kg/m3 <br /> Q = 110 scfin (average) = 185 9 m'/hr <br /> t = 839 hours (sum of known operation) <br /> 0 0011 kg/m3 • 185 9 m'/hr - 839 hours = 171 5 kg gasoline <br /> 171 5 kg gasoline • 2 2046 lbs/kg= 378 lbs gasoline <br />' to convert lbs gasoline to gallons gasoline, use 0 16 gal/lbs <br /> 378 lbs of gal - 0 16 gal/lbs = 60 5 gallons of gasoline <br /> 1 <br /> Time Frame C Q t kg removed gallons <br />' l /k m3 M3/ hours removed <br /> 11-05-01 to 00011 185 9 839 171 5 605 <br /> 12-10-01 kg/m' <br />' 12-10-01 to 000055 185 720 733 258 <br /> 01-10-02 kg/m' <br />' 01-10-02 to 0000205 184 912 344 121 <br /> 02-18-02 kg/m' <br />' Total of279 2 kg or 98 4 gallons hydrocarbons as gasoline removed between 11-05-01 and 02-18-01 <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />