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<br />The DTPP Plan-Wide Amendments program SEIR (pp. 11-20 through 11-22) generally concurred with the DTPP
<br />EIR conclusion with respect to DTPP development construction noise levels potentially exceeding City guidelines
<br />and State Title 24 standards but explained that though DTPP program EIR Mitigation Measure 11-1 required noise
<br />studies, the City determined that after the 2015 California Supreme Court decision in California Building Industry
<br />Association v. Bay Area Air Quality Management District,16 DTPP EIR Mitigation Measure 11-1 would no longer
<br />apply. However, as explained in the DTPP Plan-Wide Amendments program SEIR (pp. 11-18 through 11-19), the
<br />City decided to continue to enforce certain DTPP Final EIR noise-related mitigation measures as conditions of
<br />approval (with clarifying edits) for subsequent development applications, as warranted. These are “Condition of
<br />Approval 11a: Noise Reduction Measures for Multifamily Housing” and “Condition of Approval 11b: Groundborne
<br />Vibration Measures for Habitable Buildings”. Condition of Approval 11a does not apply to the proposed project
<br />because the proposed project component is not multifamily housing (the proposed multifamily project component at
<br />847 Woodside Road, discussed below, is not located in the DTPP area). Condition of Approval 11b does not apply to
<br />the proposed project component because the proposed project component is not within 100 feet of the Caltrain or
<br />California High Speed Railtracks.
<br />The DTPP Plan-Wide Amendments program SEIR included Mitigation Measure NO-1 (“Construction Noise
<br />Reduction”), which restates Mitigation Measure 11-4 from the DTPP Final EIR with no revisions. SEIR Mitigation
<br />Measure 11-4 requires noise control measures related to preparing a detailed construction plan, restricting the hours
<br />of construction consistent with the City’s municipal code (weekdays only between the hours of 7:00 AM and 8:00
<br />PM, except as authorized), construction equipment mufflers and maintenance, stationary noise-generating equipment
<br />placement as far as possible from sensitive receptors, construction traffic management, quiet construction equipment
<br />use, use of temporary barriers and noise blankets, and possible designation of a noise disturbance coordinator as
<br />consistent with the City’s General Plan. This mitigation measure, which shall be required as a condition of project
<br />component approval, was found to reduce the potential impacts related to construction noise to a less-than-significant
<br />level.
<br />The DTPP Plan-Wide Amendments program SEIR (pp. 11-22 through 11-27) also generally concurred with the DTPP
<br />EIR conclusion with respect to stationary noise sources and traffic noise generated from DTPP development.
<br />However, the DTPP Plan-Wide Amendments program SEIR explained that noise impacts from mechanical equipment
<br />would be uncertain due to the specific type, size, and locations of mechanical equipment on DTPP area development
<br />sites and could result in potentially severe noise impacts. Therefore, the SEIR included Mitigation Measure NO-2
<br />(“Operational Noise Performance Standard”). Mitigation Measure NO-2 requires submittal by project applicants of
<br />an acoustical study during final building design, for review and approval by the City, which evaluates potential
<br />building mechanical equipment noise generation and identifies necessary design measures to meet City standards. To
<br />help implement this mitigation measure, a site-specific noise study was prepared for the project component
<br />(“Environmental Noise Assessment, 1900 Broadway, Redwood City, CA,” Salter, 9 May 2024, revised August 14,
<br />2024).
<br />The Salter noise study (pp. 5-7) reviewed the 1900 Broadway project component, a mixed-use building in downtown
<br />Redwood City that would consist of seven-stories with ground-floor retail and office, and offices above, with outdoor
<br />use spaces provided via the Commons on the ground floor, elevated office terraces, and a roof deck. Noise sources
<br />from the project component would include short-term construction noise, project-related traffic increases, and
<br />potential rooftop mechanical equipment noise. The primary noise source at the project component site is from
<br />vehicular traffic on Main Street, Broadway, and Marshall Street, as well as surrounding businesses. As part of the
<br />noise analysis, three multi-day long-term measurements were conducted between November 8 and 10, 2023, and two
<br />short-term ‘spot’ measurements (15-minute) were conducted at two additional locations, to establish the existing noise
<br />environment, indicating existing noise levels from 60 to 67 decibels (dB) CNEL. In addition, the estimates include a
<br />1 decibel increase across the site to account for future traffic increases. The nearest existing buildings are located
<br />approximately 50 to 75 feet from the project component site, with commercial buildings across Walnut Street, Main
<br />Street, and Broadway, and residential buildings located across Marshall Street.
<br />Construction Noise (Salter, pp. 8-10): Construction of the project is expected to occur over an approximately 30-
<br />month period anticipated to start in October 2025. Construction activities will vary based on the type of equipment
<br />used, the process, and the location, but the loudest noise levels are typically from demolition, grading/excavation,
<br />trenching/foundations, concrete work, and crane work. These activities would be expected to use concrete/industrial
<br />
<br /> 16 The 2015 California Supreme Court decision in California Building Industry Association v. Bay Area Air Quality
<br />Management District ruled that CEQA does not require environmental review of the impacts of the environment on future users
<br />or residents of a project except in certain situations or where the proposed project itself would “exacerbate” the existing
<br />environmental condition.
<br />ATTY/RESO.0074/CC RESO 847 WOODSIDE (CEQA) - EXHIBIT 1 - CEQA CONSISTENCY CHECKLIST
<br />REV: 10-23-24 VR
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