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MASS CALCULATIONS OF <br /> lie <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 concenti ation (kg/m') <br />' Q = extraction flow late (m`1hr) <br /> t = operational period (hrs) <br />' The calculation for the first time period is provided as an example for the deternvnation of mass/ <br /> volume of hych ocarbons removed over the reporting period <br /> 10-11-01 to 11-05-01 <br /> using C = (162 µg11 + 278 ug/l + 1,400 µg11) —3 = 0 0006 kg/m' <br />' Q = 110 scfxn(average) = 185 9 rn3/hr <br /> t = 344 hours (sum of known operation) <br /> 0 00006 kg/m3 - 185 9 m'/hi - 344 hours = 38 37 kg gasoline <br /> 38 37 kg gasoline - 2 2046 lbs/kg = 84 5 lbs gasoline <br /> to convert lbs gasoline to gallons gasoline, use 0 16 gal/lbs <br /> 84 5 lbs of gal - 0 16 gal/lbs = 13 52 gallons of gasoline <br /> Tnne harne C t kg:removed. gallons <br /> (µ /k /M' (zn�/hr) removed <br /> 10-11-01 00006 1859 344 38 135 <br /> to 11-05-01 k m' <br /> Total of 13 5 gallons or 38 kg hych ocarbons as gasoline removed between 10-11-01 and 11-05-01 <br /> 1 <br />