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I (a BENDER READY-MIX CONCRETE MANUFACTURING PROJECT Initial Study/Mitigated Negative Declaration Table 4.3-3, Localized Significance of Emissions, shows the construction- and operational-related emissions for NOx, CO, PM,o, and PM2.5 compared to the LSTs for SRA 17, Central Orange County. As shown in Table 4.3-3, emissions would not exceed the LSTs for SRA 17. Therefore, localized significance impacts are less than significant. Table 4.3-3 Localized Significance of Emissions Pollutant (poundslday) o-y?OUfCe #. _ l t t` NOx CO PM?o PM2 Construction 2011 Total Mitigated Emissions 27.70 14.55 1.79 1.24 Localized Significance Threshold 83 753 12 4 Thresholds Exceeded? No No No No Operations Area Source Emissions 0.83 2.23 0.01 0.01 Localized Significance Threshold 83 753 3 1 Thresholds Exceeded? No No No No Note: 1. The Localized Significance Threshold was determined using Appendix C of the SCAQMD Final Localized Significant Threshold Methodology guidance document for pollutants NOx, CO, PM,o, and PM2.5. The Localized Significance Threshold was based on the project site's acreage (0.97), the distance to sensitive receptors 50 meters), and the source receptor area SRA 17). CARBON MONOXIDE HOTSPOTS The SCAQMD requires a quantified assessment of CO hotspot when a project increases the volume to capacity ratio (also called the intersection capacity utilization) by 0.02 (two percent) for any intersection with an existing level of service (LOS) D or worse. Because traffic congestion is highest at intersections where vehicles queue and are subject to reduced speeds, these hotspots are typically produced at intersection locations. However, as the proposed project would not result in any new trips following completion of construction activities, a CO hotspot analysis is not required. No impact would occur in this regard. Mitigation Measures: No mitigation is required. e) Create objectionable odors affecting a substantial number of people? Less Than Sfgnifrcantlmpact. ' According to the SCAQMD CEQA Air Quality Handbook, land uses associated with odor complaints typically include agricultural uses, wastewater treatment plants, food processing plants, chemical plants, composting, refineries, landfills, dairies, and fiberglass molding. The proposed project does not include any uses identified by the SCAQMD as being associated with odors. Construction activities associated with the project may generate detectable odors from heavy-duty equipment exhaust. Construction-related odors would be short-term in nature and cease upon project completion. Any impacts to existing adjacent land uses would be short-term and are less than significant. Mitigation Measures: No mitigation is required. JULY 2011 4.3-7 AIR QUALITY 31A-45