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MASSNOLUME CALCULATIONS OF <br /> Sr EXTRACTED HYDROCARBONS (VOCs) <br /> FIRE STATION #2 <br /> I110 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 />' 02-18-02 to 03-12-02 <br /> using Cg.= (120+82 µg/1) — 2 = 0 0001 kg/m3 <br />' Q = 105 scfm (average) = 177 M3/hr <br /> t = 527 hours (sum of known operation) <br /> 0 0001 kg/m3 - 177 M3/hr - 527 hours = 9 3 kg gasoline <br /> 9 3 kg gasoline - 2 2046 lbs/kg= 20 lbs gasoline <br />' to convert lbs gasoline to gallons gasoline, use 0 16 gal/lbs <br /> 20 lbs of gal - 0 16 gal/lbs = 3 2 gallons of gasoline <br /> Time Frame C !as (µg/1) Q t kg removed gallons <br /> to kg/m3 (m3/hr (hours removed <br />' 02-18-02 to 00001 177 527 99 32 <br /> 03-12-02 kg/m3 <br />' 03-12-02 to 0000075 177 840 11 39 <br /> 04-16-02 kg/m3 <br />' 04-16-02 to 0000034 177 648 40 14 <br /> 05-13-02 kg/m' <br />' 05-13-02 to 00 170 672 -- -- <br /> 06-11-02 1 k g6M3 <br />' Total of 25 kg or 8 5 gallons hydrocarbons as gasoline removed between 02-18-01 to 06-11-02 <br /> Advanced Geo Environmental,Inc <br /> 1 <br />