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City of Pleasanton 475 and 493 St. John Street Mixed-Use Project 50 population. Therefore, the proposed project has been accounted for in population growth projections for the DSP, and the project would not induce substantial unplanned population growth. Although the project site is not currently designated for residential use under the DSP the addition of residential units would not result in exceedance of anticipated population. The average number of persons per household at present (2024), 2.62 persons, is lower than the estimate used in the Final DSP EIR (2.83 persons). Additionally, the Final EIR estimated the increased population against the city’s 2018 population, which was 78,244 people (California Department of Finance 2023b). The population of Pleasanton has since decreased, and the city has a current (2024) population of 75,960 people (California Department of Finance 2024). Therefore, although the DSP did not originally account for residential use at the project site, the project would not result in an increase in population beyond what was estimated in the DSP EIR. Therefore, impacts related to population and housing would be less than significant. Effects and Mitigation Measures No new or substantially more severe significant effects would occur related to land use and planning compared with those identified in the Final EIR, and no new or revised mitigation measures are necessary. Conclusion There would be no impact, or impacts would be less than significant, similar to the Final EIR, and no significant new or substantially increased land use and planning impacts would occur compared to those identified in the Final EIR. 5.10 Noise Impacts Identified in the Certified Final EIR The Final EIR determined that noise and vibration-related impacts from new development under the DSP EIR could be divided into short-term impacts (i.e., those impacts related to construction activities) and long-term impacts (i.e., those impacts related to major operational noise sources such as traffic and operational equipment). New development would comply with the construction noise standards and daytime construction hours permitted by the PMC and policies to minimize construction noise. Therefore, construction noise and vibration impacts were found to be less than significant. The Final EIR stated that audible increases in noise levels generally refer to a change of 3 dB or greater, since this level has been found to be barely perceptible in exterior environments. Compliance with the policies and the noise reduction requirements and design features required under the City's General Plan Noise Element would ensure that implementation of the DSP would not expose persons to or generate noise levels in excess of standards and impacts would be less than significant. The Final EIR determined that operational noise under the DSP EIR would generate noise associated with outdoor open space and mechanical equipment, such as rooftop-mounted HVAC equipment. These impacts would be less than significant with adherence to the City of Pleasanton’s exterior noise standards pursuant to PMC Section 9.04.030 and 9.04.040. The Final EIR determined that traffic under the DSP EIR would generate new vehicle trips and incrementally increase traffic on area roadways that would increase roadway noise at nearby