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i <br /> ISoil-Vapor Extraction Volume-Mass Calculations <br /> PACIFIC MINI-MART <br /> 4511 Pacific 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/m 3) <br /> Q = extraction flow rate (m3/hr) <br /> t = operational period (hrs) <br /> The calculation for the first quarter operational time period is provided as an example for the <br /> Idetermination of volume and mass of hydrocarbons removed over the reporting period <br /> 01-25-05 to 02-28-05 <br /> using Cvapor—(28,000+14,000+3,800+2,200+-1,900+5,600 dig/1) — 6 = 9,250 micrograms per liter <br /> converted to 0 00925 kg/M3 <br /> Q = 93 scfm (average)x 1 69 = 157 M3/hr <br /> t = 794 hours (sum of known operation) <br /> 0 00925 kg/m' - 157 m3/hr • 794 hours = 1,153 kg gasoline <br /> 1,153 kg gasoline o 2 205 lbs/kg = 2,542 lbs gasoline <br /> to convert lbs gasoline to gallons gasoline, use 0 16 gals/lb <br /> 2,542 lbs • 0 16 gals/lb = 406 8 gallons of gasoline <br /> I02-28-05 to 03-23-05 <br /> Iusing C,,,,, = (5,600+8,000+4,200+3,100 µg/1) — 4 = 5,225 micrograms per liter <br /> converted to 0 005225 kg/m' <br /> I Q = 113 scfm (average) X 1 69 = 190 m3/hr <br /> t = 359 hours (sum of known operation) <br /> 0 005225 kg/m' • 190 M3/hr • 359 hours = 356 4 kg gasoline <br /> 356 4 kg gasulate - 2 205 lbs/kg = 785 lbs gasoline <br />' to convert lbs gasoline to gallons gasoline, use 0 16 gals/lb <br /> 785 lbs • 0 16 gals/lb = 125 7 gallons of gasoline <br /> IApproximately 3,327 lbs gasoline or 532.5 gallons of hydrocarbons were extracted by the SVE <br /> system since 25 January 2005 <br /> Advanced GeoEnvironmental,Inc <br />