Laserfiche WebLink
5.1 AIR QUALITY <br /> TABLE 5.1-13 <br /> Nominal Fuel Properties—Natural Gas <br /> Component Analysis Chemical Analysis <br /> Average <br /> Component Concentration,Volume Constituent Percent by Weight <br /> CH4 94.61% C 71.42 % <br /> C2H6 2.07% H 23.47 % <br /> C3H8 0.19% N 3.75 % <br /> C4H,o 0.08% 1O 1.36 % <br /> C6H12 0.02% S 1 gr/100 scf <br /> N2 2.27% Higher Heating Value 1004 Btu/scf <br /> CO2 0.65% 22,524 Btu/Ib <br /> S <0.00% <br /> 5.1.3 Emissions Evaluation <br /> 5.1.3.1 Current Facility Emissions and Permit Limitations <br /> The existing facility potential to emit (PTE) is summarized in Table 5.1-14. Daily emissions <br /> from the existing combustion turbine are limited by permit, so annual PTE is calculated <br /> assuming maximum daily operation for 8760 days per year. Emissions from the emergency <br /> fire pump engine are calculated based on 50 hours per year limitation on testing and <br /> maintenance operations in the applicable CARB Air Toxic Control Measure.3 Because the <br /> existing cooling tower is exempt from permitting, its emissions are assumed to be <br /> insignificant and are not included. <br /> TABLE 5.1-14 <br /> Potential to Emit for Existing NCPA Lodi Equipment <br /> Emissions,tons per year* <br /> Unit NOx SO2 CO VOC PM10/PM2.5 <br /> LM5000 STIG 20.4 5.7 58.8 25.9 8.8 <br /> Emergency Diesel 0.08 <0.01 0.04 0.01 0.01 <br /> Fire Pump Engine <br /> *Detailed calculations provided in Appendix 5.1A, Tables 5.1A-1 and 5.1A-2. <br /> 5.1.3.2 Facility Operations <br /> 5.1.3.2.1 New 7FA Combustion Turbine with Duct Firing <br /> Project designers evaluated combustion turbine performance under five temperature <br /> scenarios—extreme maximum temperature (107.7°F), typical summer temperature (94°F), <br /> annual average temperature (61.20F), typical winter temperature (32.6°F), and extreme <br /> minimum temperature (23.7°F). The extreme minimum temperature scenario with duct firing <br /> was used to characterize maximum emissions because it has the highest hourly heat input <br /> 3 Air Toxics Control Measure for Stationary Compression Ignition Engines,Title 17 CCR 93115 et seq. <br /> 5.1-22 SAC/371322/082410013(LEC_5.1_AIR_QUALITY.DOC) <br />