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Hana Japan Restaurant Project Initial Study/Mitigated Negative Declaration 21 May 2025 Table 3 Unmitigated Maximum Operational Emissions Pollutant Proposed Project Emissions Threshold of Significance Exceeds Threshold? lbs/day tons/yr lbs/day tons/yr ROG 2.15 0.31 54 10 NO NOX 2.09 0.24 54 10 NO PM10* 3.72 0.35 82 15 NO PM2.5* 0.97 0.09 54 10 NO * Emissions from exhaust only. BAAQMD has not yet adopted thresholds for fugitive PM emissions. Source: CalEEMod, March 2025 (see Appendix A). Cumulative Emissions Past, present, and future development projects contribute to the region’s adverse air quality impacts on a cumulative basis. By nature, air pollution is largely a cumulative impact. A single project is not sufficient in size to, by itself, result in nonattainment of AAQS. Instead, a project’s individual emissions contribute to existing cumulatively significant adverse air quality impacts. If a project’s contribution to the cumulative impact is considerable, then the project’s impact on air quality would be considered significant. In developing thresholds of significance for air pollutants, BAAQMD considered the emission levels for which a project’s individual emissions would be cumulatively considerable. The thresholds of significance presented in Table 1 represent the levels at which a project’s individual emissions of criteria air pollutants or precursors would result in a cumulatively considerable contribution to the SFBAAB’s existing air quality conditions.7 If a project exceeds the significance thresholds presented in Table 1, that project’s emissions would be cumulatively considerable, resulting in significant adverse cumulative air quality impacts to the region’s existing air quality conditions. As presented above, the proposed project would not exceed the applicable thresholds for criteria pollutant emissions during project construction or operations. Thus, the project would not result in a cumulatively considerable contribution to the region’s existing air quality conditions. Conclusion As stated previously, the applicable regional air quality plans include the 2001 Ozone Attainment Plan and the 2017 Clean Air Plan. Because the proposed project would not result in operational emissions of criteria pollutants in excess of BAAQMD’s applicable threshold of significance, conflicts with or obstruction of implementation of the applicable regional air quality plans would not occur. Thus, a less-than-significant impact would result. c. Some land uses are considered more sensitive to air pollution than others, due to the types of population groups or activities involved. Heightened sensitivity may be caused by health problems, proximity to the emissions source, and/or duration of exposure to air pollutants. Children, pregnant women, the elderly, and those with existing health problems are especially vulnerable to the effects of air pollution. Sensitive receptors are typically defined as facilities where sensitive receptor population groups (i.e., children, the elderly, 7 Bay Area Air Quality Management District. California Environmental Quality Act Air Quality Guidelines [pg. 2-1]. May 2017.