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City of Pleasanton 2023-2031 (6th Cycle) Housing Element Update Final EIR Errata FirstCarbon Solutions 3-8 https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480022/EIR/4 - Final EIR/21480022 Sec03-00 Errata.docx Impacts Mitigation Measures Level of Significance After Mitigation Impact NOI-1: Development consistent with the Housing Element Update, rezonings, and General Plan and Specific Plan Amendments could generate a substantial temporary or permanent increase in ambient noise levels in the vicinity of the potential sites for housing in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies. MM NOI-1: Stationary Source Noise Impact Reduction Measure Prior to issuance for entitlements building permits for a project, for any development project on potential sites for housing that would include any noise producing mechanical systems located within 25 feet of a property line, the project applicant shall retain a Noise Specialist to conduct a site- specific project-level noise analysis to evaluate compliance with Section 9.04.030 of the Municipal Code, which prohibits noise levels in excess of 60 A-weighted decibel (dBA) at any point outside the property plane, as defined in Section 9.04.020 of the Municipal Code as “a vertical plane including the property line which determines the property boundaries in space”. If the analysis identifies that proposed mechanical system operations could result in an exceedance of the City’s this noise performance standards, then specific measures to attenuate the noise impact shall be outlined in the analysis. The analysis shall be submitted to the City’s Building and & Safety Division for review and approval prior to issuance of building permits. The final noise-reduction measures shall be included on all final construction and building documents and/or construction management plans and submitted for verification to the City. Specific measures may include, but are not limited to, the following measures or design features: • The project applicant shall utilize quieter mechanical systems that would not result in an exceedance of the City’s operational noise standards. • The project applicant shall enclose mechanical systems in a sound- attenuating structure or shall install sound barriers adjacent to the proposed system that would reduce operational noise levels to not exceed the City’s noise performance standards as measured at the property line. • The project application shall relocate the proposed mechanical system further from property line to reduce operational noise levels to not exceed the City’s noise performance standards as measured at the property line. Less than significant impact with mitigation incorporated. 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. MM NOI-2: Construction Vibration Reduction Plan For any future development projects that would necessitate the use of pile- driving within 200 feet of an off-site structure, prior to the issuance of entitlements 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 Less than significant impact with mitigation incorporated.