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City of Pleasanton 2023-2031 (6th Cycle) Housing Element Update CEQA Findings of Fact and Statement of Overriding Considerations FirstCarbon Solutions 109 Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480022/FOF/21480022 Pleasanton Housing Element FOF.docx one roadway segment, Busch Road east of Valley Avenue, would experience an increase of up to 4 dBA under existing plus project conditions compared to conditions without the project. However, under cumulative conditions, the project-related increase on this segment would only be 0.5 dBA compared to cumulative conditions without implementation of the Housing Element Update. In addition, this increase would only result in noise levels of up to 59.9 dBA Ldn under existing plus project conditions, which is considered normally acceptable for new residential land use according to the City’s noise and land use compatibility guidelines. Moreover, as noted in Table 3.11-7, noise levels were modeled utilizing worst-case factors such as assuming flat, reflective terrain without any attenuating topography, vegetation, or building design. Therefore, buildout of the potential sites for housing would not result in a substantial permanent increase in traffic noise levels compared to levels that would exist without implementation of the Housing Element Update. Compliance with Applicable Plans, Policies, or Regulations: Development on potential sites for housing could expose new noise-sensitive uses to traffic or railroad noise levels in excess of the City’s established normally acceptable noise land use compatibility standards. Implementation of the guidelines for land use compatibility contained in the General Plan will be used by the City to determine where new development would be allowed and where noise studies and mitigation measures are needed. General Plan Noise Element Program 1.3 requires the use of noise guidelines and contours to determine the need for noise studies and also requires new developments to construct or pay for noise attenuation features as a condition of approving new projects. Program 1.5 of the Noise Element encourages the use of design strategies and other methods to attenuate noise in lieu of traditional sound walls. Program 4.3 of the Noise Element would enforce the noise emissions standards for all vehicles, and Program 4.4 establishes the City’s policy of using noise- attenuating street paving in areas impacted by traffic noise. Therefore, development consistent with the Housing Element Update that would include single- or multi-family land use development adjacent to roadway segments identified in Table 3.11-7 that have modeled noise levels in excess of 60 dBA or 65 dBA Ldn, respectively, as measured at 50 feet from the centerline of the outermost travel lane, shall demonstrate compliance with General Plan Noise Element Policy 1, 2, and 3 and incorporate project design features that would reduce traffic noise impacts for proposed development on that project site. In addition, any residential development on Site 27 (PUSD- Vineyard) must also comply with the measures included in the Vineyard Avenue Corridor Specific Plan, including the requirement for all new 2-story homes constructed less than 140 feet from the centerline of the realigned Vineyard Avenue and all new homes located where projected noise levels exceed an Ldn of 55 dBA be constructed with a fresh-air ventilation and/or air conditioning system that allows residents to maintain closed windows for noise and dust control. Stationary Operational Noise Impacts: The City has established operational noise performance standards for residential properties in Section 9.04.030 of the Municipal Code which prohibits noise levels in excess of 60 dBA at any point outside the property plane unless otherwise provided in the Municipal Code. The primary stationary noise source associated with development consistent with the Housing Element Update would be new mechanical ventilation system equipment operations. The potential associated impacts are discussed below.