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I r n 0 0 TABLE 1 POTENTIAL TO EMIT SOURCE ESTIMATES FOR TWO (2) INTERNAL COMBUSTION (IC) ENGINES -100% LOAD FORWARD LANDFILL MANTECA, CALIFORNIA Variables: NMOCsNOCs: 20 ppmv @ 3 % 02 as hexane (outlet) MODEL INPUT VARIABLES: POTENTIAL TO EMIT Methane Concentration 50.0% backend controls Genset horsepower 3,012 hp Fuel Value 319 Btu/cf Landfill Gas Collection Rate (single IC Engine) 942 SCFM Max LFG Exhaust Rate from Engine" 5,565 SCFM Oxygen Content in Exhausf 10 % Maximum Availability of Engine (Annualp 100.0 % Criteria pollutant emission factors used for IC Engines Pollutant Emission factor NMOCsNOCs: 20 ppmv @ 3 % 02 as hexane (outlet) 0nta Source BACT/NSPS Lowest achievable emission levels with CO 1.8 g/bhp-hr backend controls Lowest achievable emission levels with NO, 0.15 g/bhp-hr backend controls SOz 150ppmv BACT PMro/PM 0.07 g/bhp-hr BACT Notes: r List of hazardous air pollutants was from Title III Clean Air Ant Amendments, 1990, and include compounds found in landfill gas, as determined from a list in AP -42 Tables 2.4-1 ("Default Concentrations for Landfill Gas Constituents, 11/98'). Average concentration of HAPS found in LFG were taken from "Waste Industry Air Coalition Comparison of Recent Landfill Gas Analyses with Historic AP -42 Values" since site specific data was unavailable. s Based on a maximum flow rate into the IC Engine of 942 scfm @ 50% methane at 319 BTU/scf Values based on AP42, Table 2.4-3: 93% for halogenated species, and 86.1 % for non -halogenated species. For xylenes, 98% control efficiency is used, since xylenes is considered the compound that is easier to destroy among NMOCs. s Concentration of HCI and Mercury is based on AP -42 Section 2.4 (11/98) VOC emissions are equal to NMOC emissions Reduced Sulfur Compound Concentration, per SCAOMD Rule 431.1 85,565 scfm LFG exhaust rate based on 10% oxygen per manufacturer. 8 Maximum Availability of IC engines based on plant -wide annual limit. IS021 Emissions from the Engine [ton/yr]=(Molecular Weight of SO2 / Molecular Weight of H26)'((Molecular Weight of H2S[g/mo1])'(Concentration of Compound[ppmvy1,000,000) '(LFG Flow to Engine [cfm])'(60 min/hr) - (24 hr/day)' (365 day/year)'(tton/2000lb)'(1 lb/453.6g)`(1 mol/24.04L @ STP)'(28.32U1 cf)) (VOC) Emissions from the Engine [ton/yr)=((Molecular Weight of NMOC as hexane(g/mol])'(Concentration of Compound(ppmvyl,000,000) '(Exhaust rate from Engine [cfm])'(60 minmr) - (24 hr/day)' (365 day/year)'(1ton20001b)'(1 ib/453.6g)'(l mol/24.04L @ STP)-(28.321Jtcf))