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City of Pleasanton 2023-2031 (6th Cycle) Housing Element Update CEQA Findings of Fact and Statement of Overriding Considerations 110 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480022/FOF/21480022 Pleasanton Housing Element FOF.docx Mechanical Equipment Operations: Noise levels from typical residential mechanical ventilation equipment are anticipated to range up to approximately 60 dBA Leq at a distance of 25 feet. Program 4.6 of the Noise Element requires developers of new projects that would significantly increase noise in nearby homes to mitigate noise impacts with walls, berms, or other measures and/or to provide noise-attenuating measures in the homes. Program 5.2 of the Noise Element requires developers of new projects to locate new noise sources away from noise-sensitive land uses unless development plans include appropriate mitigation measures. To ensure compliance with these programs and the City’s noise performance standards, MM NOI-1 shall be implemented, which requires preparation of a noise analysis for any development that would locate noise producing mechanical systems within 25 feet of a project property line. If potential noise impacts are identified, then mitigation must also be identified (Draft Program EIR, Page 3.11-19–25). The City finds that MM NOI-1 is feasible, is adopted, and will further reduce impacts associated with noise. Accordingly, the City finds that, pursuant to Public Resources Code Section 21081(a)(1) and State CEQA Guidelines Section 15091(a)(1), changes or alterations have been required in, or incorporated into, the Housing Element Update that mitigate or avoid the potentially significant impacts as identified in the Program EIR. Therefore, impacts associated with noise would be less than significant with mitigation incorporated. Potential Effect Impact NOI-2: Development consistent with the Housing Element Update, rezonings, and General and Specific Plan Amendments could result in generation of excessive groundborne vibration or groundborne noise levels (Draft Program EIR, Page 3.11-25). Findings: Less than significant impact with mitigation incorporated (Draft Program EIR, Page 3.11-27). Changes or alterations have been required in, or incorporated into, the Housing Element Update which avoid or substantially lessen the significant environmental effects as identified in the Program EIR. (State CEQA Guidelines, § 15091(a)(1)) Mitigation Measures MM NOI-2 Construction Vibration Reduction Plan For any future development projects that would use pile-driving within 200 feet of an off-site structure, prior to the issuance of grading permits for a project, the project sponsor shall retain a Noise Specialist to prepare a Construction Vibration Reduction Plan for submittal to the City’s Planning Director for review and approval that identifies specific techniques, such as the depth and location of temporary trenching, that would reduce potential vibration impacts to less than significant for any impacted structures. Upon approval by the City, the construction vibration reduction measures shall be incorporated into the construction documents. A note shall be provided on grading and building plans indicating that, during grading and construction, the property owner/developer shall be responsible for requiring contractors, to be monitored via on-site inspection by the Community Development