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4.Environmental Analysis - <br /> TABLE 4.6-513 _ <br /> OPERATIONAL EMISSIONS AT A PRODUCTION LEVEL OF 2.85 MILLION TONS <br /> (Tons Per Year) <br /> Estimated <br /> Project Estimated - <br /> Valley Air On-Site Emissions Project <br /> District Processing (Onsite Emissions <br /> Year Pollutant Thresholds Equipment Equipment) (Haul Trucks) Total <br /> 2008 ROG 10 4.25 1.83 3.08 9.16 <br /> NO. 10 49.4 24.2 30.0 104 <br /> PM10 - 253 1.05 1.07 255 <br /> 2020 ROG 10 <br /> NO. 10 4.25 2.24 1.08 7.57 <br /> PMiu - 49.4 19.2 6.91 75.5 <br /> SOURCE: Environmental Science Associates,2004. <br /> TABLE 4.6-5C - <br /> OPERATIONAL EMISSIONS AT A PRODUCTION LEVEL OF 1.7 MILLION TONS <br /> (Tons Per Year) <br /> Estimated - <br /> Project Estimated <br /> Valley Air On-Site Emissions Project <br /> District Processing (On-Site Emissions <br /> Year Pollutant Thresholds Equipment Equipment) (Haul Trucks) Total <br /> 2008 ROG 10 4.25 0.78 1.84 6.87 <br /> NO. 10 31.6 10.3 17.9 59.8 <br /> PMia - 173 0.45 0.64 174 <br /> 2020 ROG 10 <br /> NO. 10 4.25 0.95 0.64 5.84 <br /> PMio - 31.6 8.15 4.12 43.9 <br /> SOURCE: Environmental Science Associates,2004. <br /> Mitigation Measures <br /> Measure 4.6.2: While several emission-reducing measures are currently available, current - <br /> proven technology limits the maximum reductions. These operational impacts are a <br /> significant impact of the project after mitigation. The project proposes to operate new <br /> equipment, both on-site nonroad equipment and haul trucks. This provides the best - <br /> available operating efficiency for the equipment. Currently, additional retrofits to reduce <br /> NO.emissions below acceptable emission standards would be cost prohibitive. Catalytic <br /> particulate filters and the use of ultra low sulfur fuels do not substantially reduce NOx - <br /> emissions. <br /> Impact Significance After Mitigation: Significant - <br /> The applicant would use the latest equipment upon commencing mining, which would <br /> thereby implement BACT. ROG emissions would be just above the significance level in <br /> 2008 for annual production levels of 4 million tons. NO.emission would be 4 to 14 times <br /> above the significance criterion under the various scenarios analyzed in Tables 4.6-5A, B <br /> RMC Pacific Vernalis Quarry Mining and Reclamation Project 4.6-24 ESA 1203015 <br /> Draft Environmental Impact Report May 2006 <br />