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. Working to Restore Nature <br /> Under normal operating conditions, the influent concentration will be 50% of LEL as total <br /> VOC's (122 x 10-3 lbs/cu ft ) This corresponds to a VOC inlet rate of 14 7 lbs per hour <br /> Tests on extracted soil gases have shown that the benzene to total VOC ratio averages at <br /> 0 034 Therefore, the expected maximum benzene inlet concentration is expected to be 4 15 <br /> X 10-5 lb/cu ft at a rate of 0 5 lbs per hour <br /> Outlet concentrations are based upon the manufacturer's standard destruction efficiency of <br /> 99% Total non-menthane hydrocarbon emissions concentrations will be 122 x 104 lb/cu <br /> ft (0 147 lbs per hour) Benzene emissions will be 4 15 x 10-7 lb/cu ft (0 005 Ib per hour) <br /> Phase 2 <br /> Outlet concentrations for non-methane hydrocarbon emissions concentrations will be 0 0381 <br /> lbs/day and Benzene emissions will be 0 00129 Ib/day <br /> Fuels and Burners Used <br /> A Burners One Eclipse MVTA (medium velocity tempered air), with a maximum rate <br /> of heat input at 752,000 BTU/hr <br /> B Fuels The fuel type will be natural gas obtained from a public utility having an <br /> assumed heating value of 1MMBTU/MCF and sulfur content of 0 1 gr/100 SCF <br /> Excess combustion air is estimated to be 104 9 SCFM <br /> 4 <br />