3A Public Hearing 2010 0503 - Laserfiche WebLink

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construction activities for both the Mixed -Use Retail Development project and the Kaiser Medical Center, would reduce the impact but not to a less than significant level. There are no other feasible mitigation measures to further reduce such emissions, so the impact is temporary, but significant and unavoidable. This potential unavoidable significant impact is overridden as set forth below in the Statement of Overriding Considerations. (2) Impact AQ -2 finds that the proposed project would create new area and mobile sources of air pollutants that would generate emissions of ROG, NOX, PM 10, and PM2.5 that would exceed BAAQMD's established significance thresholds and would contribute substantially to an existing or projected air quality violation and could conflict with or obstruct implementation of the regional air quality plans to achieve attainment. The analysis shows that the majority of emissions generated by the Kaiser Medical Center and the Mixed -Use Retail Development would be generated by mobile source emissions from project - related trips. Mitigation Measure AQ -2.1, which requires the project sponsors to develop a Transportation Demand Management (TDM) program to reduce vehicle trips generated by their respective developments by approximately 10 percent to 15 percent, would reduce the impact but not to a less than significant level. Based on evidence in the record, the City determined that achieving a 10 to 15 percent reduction in vehicle trips is both aggressive and achievable, and further reductions beyond that amount are not feasible. This potential unavoidable significant impact is overridden as set forth below in the Statement of Overriding Considerations. (3) Impact AQ -6 finds that since operational emissions from both the Kaiser Medical Center and the Mixed -Use Retail Development would be individually significant, operational emissions would also be cumulatively considerable. Mitigation Measure AQ -2.1 above would help reduce project emissions, but not to a less than significant level. This potential unavoidable significant impact is overridden as set forth below in the Statement of Overriding Considerations. b. Traffic Impacts — Existing plus Phase 1 of the Kaiser Medical Center: Impact TR -1 finds that, when traffic generated by Phase 1 of the Kaiser Medical Center is added to the roadway network (including planned roadway changes and project improvements), the intersection at the Marina Boulevard/Merced Street would be adversely impacted. Mitigation Measure TR -1.1 requires implementation of an adaptive traffic signal system, not just at this intersection but at all of the signals along the Marina Boulevard corridor between Merced Street and Alvarado Street, and along the Merced Street corridor between Marina Boulevard and Fairway Drive. An adaptive traffic signal system allows for the modification of signal cycle lengths and optimized actuated signal phasing sequence and timings for the corridor. An adaptive traffic signal system required additional hardware to be added to each of the signals along these corridors. Such a system would improve traffic operations at the Marina Boulevard/Merced Street intersection. The mitigation measure requires the project sponsors to contribute a fair share sum towards this adaptive traffic signal system. However, implementation of an adaptive traffic signal system at the -10-