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MASS CALCULATIONS OF ' EXTRACTED HYDROCARBONS (Gasoline) Mel Bokides Petroleum, Inc. 501 W. Lodi Avenue, Lodi, California The hydrocarbon mass removed during the operating period can be calculated using the following ' equation: M= C•Q•t ' where: M= cumulative mass recovered (kg) C = vapor concentration (kg/m3) Q = extraction flow rate (m3/hr) t = operational period (hrs) The calculation for the first time period is provided as an example for the determination of mass/ volume of hydrocarbons removed over the reporting period. 03-19-02 to 04-15-02 using: C= 110 gg/l+ 110 gg/ll2= 0.00011 kg/nn Q= 56 scfrn(average) =94 m'/hr ' t = 15.7 hours (sum of known operation) 0.00011 kghrI - 94 nPhr • 15.7 hours =0.16 kg of gasoline ' • 0.16 kg of gasoline • 2.2046 lbs/kg= 0.35 lbs of gasoline to convert lbs of gasoline to gallons of gasoline, use 0.16 gal/lbs: 0.35 lbs of gal • 0.16 gal/lbs = 0.056 gallons of gasoline 0445-02 to 05-06-02 using: C = 110 1ig/1+ 380 �Lg/l/2 = 0.000245 kg/rrl ' Q= 69 scf n(average) = 116 m3/hr t = 502 hours (sum of known operation) ' 0.000245 kgW • 116 nPhr • 502 hours= 14.3 kg of gasoline 14:3 kg of gasoline • 2.2046 lbs/kg= 31.4 lbs of gasoline to convert lbs of gasoline to gallons of gasoline, use 0.16 gal/lbs: 31.4 lbs of gal • 0.16 galllbs = 5 gallons of gasoline ' 05-06-02 to 06-03-02 using: C= 360 pg/1+ 380 Vg/l/2 = 0.00037 kg/In3 Q= 67 scfm(average)= 113 z Pby t = 668 hours (sum of known operation) - 0.00037 kg/m3 • 113 rn3/hr • 668 hours =27.9 kg of gasoline 27.9 kg of gasoline • 2.2046 lbs/kg= 61.5 lbs of gasoline to convert lbs of gasoline to gallons of gasoline, use 0.16 gal/lbs: 61.5 lbs of gal • 0.16 gal/lbs =9.8 gallons of gasoline ' Approximately 42kg, 93 lbs or 14.5 gallons gasoline removed between March and June 2002 On average 1 lbs of gasoline were removed each day of operation. Advanced CeoEnvironme=4Inc.