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101 at more than 110 decibels (dB) measured at any point within a residential district of the City and outside of the plane of the property. Construction noise is required to be less than 110 dB within residential districts or within 500 feet of a residential district in the City, and no construction noise is permitted between the hours of 8:00 PM and 7:00 AM the following day. The General Plan requires all exterior noise sources (e.g., construction operations, air compressors, pumps, fans, and leaf blowers) to use available noise suppression devices and techniques to bring exterior noise down to acceptable levels compatible with adjacent land uses. The primary sources of noise from the project component would be temporary construction noise and ongoing operational noise. Construction noise is largely a function of the construction equipment used, the location and sensitivity of nearby land uses, and the timing and duration of the noise-generating activities. Construction noise levels would vary depending on construction phase, equipment type and duration of use, distance between the noise source and receptor, and presence or absence of barriers between the noise source and receptor. According to the Focused GPU program EIR (p. 4.13-28), “The City’s existing Municipal Code requirements and General Plan policies would ensure construction activities do not occur during the most sensitive time periods (e.g., evening and nighttime periods) and require future discretionary projects to assess and minimize construction noise levels consistent with City goals, policies, and code standards.” The Redwood City General Plan Public Safety Element includes the following applicable program: “Program PS‐61: Acoustical Analyses. Require acoustical analyses, as appropriate, for proposed stand‐alone residential development within the 60 dB CNEL or higher contour, as shown in Figure PS‐12. Require incorporation of mitigation measures as necessary to reduce noise levels to levels deemed appropriate by the City.” The project component site is located within the 60-65 dB contour of Figure PS-12 and therefore an acoustical analysis, with mitigation recommendations as necessary, has been prepared, as discussed below. Consistent with the previously certified Focused GPU EIR, a site-specific noise study was prepared for the project component (“847 Woodside Road Affordable Housing Environmental Noise and Vibration Study,” Coffman Engineers, June 6, 2024). Most of the construction equipment used for project component construction would be diesel powered equipment, including excavators, backhoes, dozers, and tractors. Construction activities would not include pile driving or the use of vibratory rollers. The Environmental Noise and Vibration Study calculated construction equipment noise levels along the site’s property lines that abut residential properties. Construction of the project component would produce noise levels within the 110 dBA limit set by Municipal Code Section 24.30 (Coffman Engineers, p. 19). To implement the General Plan Program PS-61requirement, the Environmental Noise and Vibration Study recommended the following measures to minimize the potential for construction noise to affect neighboring noise-sensitive land uses. • Ensure that noise-generating construction activity is limited to between the hours of 7:00 AM to 8:00 PM, Monday through Friday, and noise levels generated by construction are prohibited on Saturdays, Sundays, and holidays. (Redwood City Municipal Code Section 24.30) • The contractor shall use “new technology” power construction equipment with state-of-the-art noise shielding and muffling devices. All internal combustion engines used on the project site shall be equipped with adequate mufflers and shall be in good mechanical condition to minimize noise created by faulty or poorly maintained engines or other components. • The unnecessary idling of internal combustion engines shall be prohibited. • Construct solid plywood fences around the construction site adjacent to residences or noise-sensitive land uses. • Temporary noise control blanket barriers could be erected along building facades of the construction site. This mitigation would only be necessary if conflicts occurred which were irresolvable by proper scheduling. Noise control blanket barriers can be rented and quickly erected. • Staging areas and stationary noise-generating equipment shall be located as far as possible from noise- sensitive receptors such as residential uses. • The surrounding neighborhood shall be notified early and frequently of the construction activities. • A “noise disturbance coordinator” shall be designated to respond to any local complaints about construction noise. The disturbance coordinator would determine the cause of the noise complaints (e.g., beginning work too early, bad muffler and institute reasonable measures warranted to correct the problem. A telephone number for the disturbance coordinator shall be conspicuously posted at the construction site. The Environmental Noise and Vibration Study concluded potential project component construction noise would meet the requirements of the City’s Municipal Code and would therefore be consistent with the Focused GPU EIR, resulting in a less-than-significant impact (Coffman Engineers, p. 22). The project component would comply with Municipal ATTY/RESO.0074/CC RESO 847 WOODSIDE (CEQA) - EXHIBIT 1 - CEQA CONSISTENCY CHECKLIST REV: 10-23-24 VR Page 101 of 135