Reso PC16-23 PC 0116 Reso CEQA - Sandpiper

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Section 4.0—Environmental Setting and Discussion of Impacts The City's General Plan recognizes that construction is necessary and contains measures to reduce and avoid construction noise impacts. General Plan Policy PS -13.6 requires all construction operations to use available noise suppressions devices and techniques to bring exterior noise down to acceptable levels that are compatible with adjacent land uses. Policy PS -13.8 implements appropriate standard construction noise controls for all construction projects. Program PS -63 enforces construction and maintenance noise regulations. The proposed project could result in a significant noise impact if these applicable General Plan policies are not implemented. Impact NOI-1: Construction of the proposed project could result in temporary noise impacts to residences in the vicinity of the project site, if applicable General Plan policies are not implemented. (Significant Impact) Mitieation Measure: The following mitigation measures, identified in Program PS -63 of the City of Redwood City General Plan, shall be implemented to reduce temporary construction noise impacts to adjacent residences to a less than significant level. MM NOI-1: • Limit construction to the hours of 8:00 AM to 5:00 PM on weekdays, and 9:00 AM to 5:00 PM on Saturdays, with no noise generating construction on Sundays or holidays. • Control noise from construction workers' radios to the point where they are not audible at existing residences that border the project site. • Equip all internal combustion engine driven equipment with mufflers that are in good condition and appropriate for the equipment. • Utilize quiet models of air compressors and other stationary noise sources where technology exists. • Locate stationary noise generating equipment as far as possible from sensitive receptors when sensitive receptors adjoin or are near a construction project area. • Prohibit unnecessary idling of internal combustion engines. • Notify residents adjacent to the project site of the construction schedule in writing. Implementation of the mitigation measures outlined above, per the City's General Plan, would reduce construction noise levels emanating from the site, limit construction hours, and minimize disruption and annoyance. With the implementation of these measures, and the limited duration of the noise generating construction period, the construction activities associated with the proposed project would not result in a substantial temporary increase in ambient noise levels. (Less Than Significant Impact with Mitigation Incorporated) Construction Vibration Vibration may be noticeable at the nearest residences during project construction activities involving the use of heavy equipment. While perceptible, vibration levels would not cause damage to the nearest structures. Construction levels during various types of construction activities are shown in City of Redwood City 77 Initial Study/Mitigated Negative Declaration Sandpiper Elementary School Facilities Expansion November 2016