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' Soil-Vapor Extraction Volume-Mass Calculations <br />' AGE-NC Project No 99-0645 <br /> Page 2 of 2 <br /> i <br />' 01-21-05 to 0248-05 <br /> using Cvaw,= (450+820 41) — 2 = 635 micrograms per liter <br />' converted to 0 000635 kg/m3 <br /> Q = 65 scfm (average) X 1 69 = 109 85 m3/hr <br />' t = 624 hours {sum of known operation) <br /> 0 000635 kg/m3 • 109 85 m3/hr • 624 hours = 43 53 kg gasoline <br />' 43 53 kg gasoline • 2 205 lbs/kg = 95 98 lbs gasoline <br /> to convert lbs gasoline to gallons gasoline, use 0 16 gal/lb <br />' 95 98 lbs - 0 16 gal/lb = 15 36 gallons of gasoline <br /> 02-18-05 to 03-17-05 <br /> using C,apor= (820+650 µg11) —2 = 735 micrograms per liter <br /> converted to 0 000735 kg/m3 <br /> Q = 64 scfm (average) X 1 69 = 108 m3/hr <br /> t = 216 hours {sum of known operation) <br /> 0 000735 kg/m3 • 108 m3/hr • 216 hours = 17 14 kg gasoline <br /> 17 14 kg gasoline • 2 205 lbs/kg = 37 80 lbs gasoline <br />' to convert lbs gasoline to gallons gasoline, use 0 16 al/lb <br /> 37 80 lbs • 0 16 gal/lb = 6 05 gallons of gasoline <br /> Approximately 156 13 kg(344 25 pounds), or 55 09 gallons of hydrocarbons were extracted by the <br /> SVE system between 17 November 2004 and 17 March 2005 Approximately 1,138 lbs, or 182 <br /> gallons, of gasoline were extracted by the SVE system since 05 October 2004 <br /> Advanced GeoEnvironmental,Inc <br />