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AE8 <br /> EXTRACTION AND EMISSION RATES <br /> Former ARCO Station No 6100 <br /> 25775 South Patterson Pass <br /> Tracy,California <br /> i <br /> i <br /> Notes <br /> RO=Gasoline Range Organics <br /> 6H6=Benzene <br /> Effluent Flow rate=Influent flow rate+natural gas consumption rate+combustion air flowrate <br /> Combustion air flow rate=125 cfm(assumed constant) <br /> 'System influent includes dilution air and since it is measured on the positive side of the blower flow is corrected only for temperature <br /> Propane usage rate is estimated based on the invoice summary provided by Kamps Propane for May and June 2005 Usage rate was assumed to remain constant <br /> A system influent was not collected and hence the influent concentrations were used in estimating the mass extraction and emission rates <br /> am le Calculations <br /> Ext Rate from — 71 5 cu ft x 27,000 M&_ x 0 028 cu meter x lb <br /> Wells(lbs/day) min cu meter cu ft 454000 mg <br /> = 350 36 lbs/dav <br /> st Removal — (350 36-1 35)x 100=>98 07% <br /> Efficiency % 35036 <br /> Arco_6100_Quarterly_0&M_500cftn Page 2 of 2 STRATU5 <br />