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Environmental Checklist Air Quality Draft Initial Study – Mitigated Negative Declaration 35 b. Would the project result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard? The SFBAAB is designated as a nonattainment area for the NAAQS for ozone and PM 2.5, and the CAAQS of ozone, PM10 and PM2.5. The following subsections discuss emissions associated with construction and operation of the proposed project. Construction Emissions Project construction would generate temporary air pollutant emissions associated with fugitive dust (PM10 and PM2.5) and exhaust emissions from heavy construction equipment and construction vehicles in addition to ROG emissions that would be released during the drying phase of architectural coating. Table 8 summarizes the estimated maximum daily emissions of pollutants during project construction. Table 8 Estimated Daily Construction Emissions Estimated Maximum Daily Emissions (lbs/day) Construction Activity ROG NOX Exhaust PM10 Exhaust PM2.5 2024 0.28 3.02 0.03 0.03 2025 0.15 0.92 <0.01 <0.01 BAAQMD Thresholds 54 54 82 54 Threshold Exceeded? No No No No ROG = reactive organic gases, NOX = nitrogen oxides, PM10 = particulate matter 10 microns in diameter or less, PM2.5 = particulate matter 2.5 microns in diameter or less; lbs/day = pounds per day, BAAQMD = Bay Area Air Quality Management District Notes: All emissions modeling was completed using CalEEMod in accordance with applicant-provided information and data. Emissions presented are the highest of the winter and summer modeled emissions. See the end of Appendix B for updated model output results. As shown in Table 8, construction-related emissions would not exceed BAAQMD thresholds. Therefore, project construction would not result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard. Impacts would be less than significant. Fugitive Dust Site preparation and grading may cause wind-blown dust that could contribute particulate matter into the local atmosphere. BAAQMD does not have quantitative thresholds for fugitive dust emissions during construction. Instead, BAAQMD recommends Best Management Practices (BMPs) be implemented to reduce fugitive dust emissions. The project would include implementation of Mitigation Measure AQ-1, BAAQMD Basic Construction Mitigation Measures. The BAAQMD CEQA Air Quality Guidelines consider construction criteria air pollutant emissions impacts that are below BAAQMD thresholds to be less than significant with the incorporation of BAAQMD BMPs. Impacts would be less than significant with implementation of Mitigation Measure AQ-1. Operational Emissions Operation of the project would generate criteria air pollutant emissions associated with area sources (e.g., architectural coatings, consumer products, and landscaping equipment), energy sources (i.e., nonrenewable energy sources) and mobile sources (i.e., vehicle trips and truck trips to