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Veterans Memorial Senior Center/YMCA Project 12 Addendum #2 City of Redwood City November 2025 Table 4.2-1: Original and Modified Projects Average Daily Construction Period Emissions ROG NOx PM10 Exhaust PM2.5 Exhaust (pounds per day) Original Project (Phase 1 + Phase 2) 7.4 32.0 1.5 1.4 Modified Project (Phase 1 + Modified Phase 2) 7.7 34.3 1.6 1.5 Significance Threshold 54 54 82 54 Exceed Threshold? No No No No Illingworth & Rodkin. Quantitative Analysis of Building Square-Footage and Soil Hauling Increase. April 23, 2025. As shown in Table 4.2-1 above, the modified project would result in a minor increase in construction period emissions; however, the unmitigated emissions would still remain below the applicable significance thresholds. In addition, like the original project, the modified project would implement BMPs prescribed by the Air District to further reduce emissions by limiting unnecessary emissions and fugitive dust generated by construction equipment on-site. Therefore, the modified project would not result in any new significant impacts or more significant impacts related to construction period criteria pollutant emissions than disclosed in the 2019 EIR or 2022 Addendum. Operational Period Emissions The 2019 EIR determined that operational air emissions from the original project would be generated primarily from automobiles driven by employees and future site users. The 2019 EIR modeled these estimated emissions and concluded operational emissions from the original project would be well below the thresholds of significance; therefore, impacts would be less than significant.6 Like the original project, operational air emissions from the modified project would be generated primarily from automobiles driven by employees and future site users. A 2025 update to Redwood City YMCA/Veterans Memorial Campus Transportation Study (2025 Transportation Study Update) (Appendix C) shows that the modified project would add nine additional vehicle trips in the weekday AM peak hour and seven additional vehicle trips in the weekday PM peak hour compared to the original project. Because the original project emissions were well below the thresholds of significance (e.g., at least 94 percent below the thresholds) and the modified project would result in a negligible increase in vehicle trips and associated operational emissions and a reduction in the total building square footage of the YMCA and VMSC, the additional emissions from the increase in vehicle trips would not result in an exceedance of the significance thresholds. Therefore, the modified project would not result in any new significant impacts or substantially more severe operational air quality impacts than disclosed in the 2019 EIR. 6 City of Redwood City. Draft Environmental Impact Report - Veterans Memorial Senior Center/YMCA Project. SCH# 2016112041. June 2019. Pages 39 to 40. ATTY/RESO.0111/CC RESO CONSIDERING AND APPROVING AN ADDENDUM TO THE FINAL EIR (YMCA PROJECT CEQA) - EXHIBIT A REV: 11-06-25 VR