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I <br /> I <br /> Soil-Vapor Extraction Volume-Mass Calculations <br /> Former Mel Bokides Petroleum - Linden <br /> 8203 East Highway 26, 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 (m'/hr) <br /> t = operational period (hrs) <br /> The calculations for the determination of volume and mass of hydrocarbons removed over the <br /> reporting period are provided below <br /> 11-17-04 to 12-21-04 <br /> using C,a,,,r= (500+650 µg/l) — 2 = 575 micrograms per liter <br /> converted to 0 000575 kg/m3 <br /> Q = 62 scfm (average) x 1 69 = 105 M3/hr <br /> t = 840 hours (sum of known operation) <br /> 0 000575 kg/m3 • 105 M3/hr • 840 hours = 50 715 kg gasoline <br /> 50 715 kg gasoline - 2 205 lbs/kg = 111 8 lbs gasoline <br /> to convert lbs gasoline to gallons gasoline, use 0 16 gal/lb <br /> 111 8 lbs • 0 16 gal/lb = 17 89 gallons of gasoline <br /> 12-21-04 to 01-21-05 <br /> Iusing C,aP,,, = (650+450 µg/1) — 2 = 550 micrograms per liter <br /> converted to 0 00055 kg/m' <br /> Q = 67 scfm (average) X 1 69 = 113 m'/hr <br /> t = 720 hours (sum of known operation) <br /> 0 000550 kg/m' - 113 M3/hr• 720 hours = 44 75 kg gasoline <br /> 44 75 kg gasoline - 2 205 lbs/kg= 98 67 lbs gasoline <br /> I to convert lbs gasoline to gallons gasoline, use 0 16 gal/lb <br /> 98 67 lbs - 0 16 gal/lb = 15 79 gallons of gasoline <br /> Advanced GeoEnvu onmental,Inc <br /> I <br />