Reso13 PC 13-16 2898 PC Reso Recommending Stanford EIR Certification

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Bath existing and projected noise levels throughaut much af the Precise Plan area, especialfy in the �icinity of U.S. 101, exceed K5 dBA CNEL, thereby potentially exposing the proposed child care center to na�se levels exceeding the "normally acceptable"threshafd. Mitigation: Mitigation 13-1. Location-specific naise studiss cansistent wikh the req�airements of the State Building Code (SBC) shall be canducted for th� proposed child care use to identify apprapriate noise reduction measures to be included in project final desigr�. The �oise study must be submitted to and a�proved by the Redwood City Community Developme�f Department prior to City issuance of the child care center building permit. Identified naise �nsulation measures may include: � Site planning to minimize noise by locating the child care center away from U.S. 'f01, with buffering from roadway noise provided by other project buildings; ■ Air canditioning throughout the child care center so t�at windows can remain clased to maintain interior noise levels below 45 dBA CNEL; and ■ Sound-rated windaws and construction me#hods if necessary to maintain interior noise levels below 45 dBA CN�I.. For child care center outdaor use areas, noise levels at the property line should be maintained at a CNEL not in excess of 55 dBA during operati�g haurs. Although existing and future n4ise le�els measured along roadways in the project �icinity exceed 55 dBA CNEL, noise levels in outdoor acti�ity areas could be reduced from roadside levels by at least 20 dBA through sit� selectio� and site design, inciuding buffer areas, siting the building as an effective noise barrier for adjacent traffic noise sources, and, or in combination with, other noise barriers. The appra�al of future commercial uses near the child care center may, at City discretion, require a noise study demonstrating how the proposed n�w commercial uses—including associated loading docks, refuse areas, �entilation systems, and emergency generators--would meet these standards. Finding: Implementation of Mitigation 13-1 would red�ce the potentia! noise impact on the proposed child care use ta a less-than-sig��canf level. Facts in Support of Finding; Irrtplementation af Mitigation 'E3-1 would reduce noise impacts on the {�ropased child care center to a less-than-sign�ficant le�el by requiring site planning and noise insulation that results in a noise level of nat more than 55 dBA CNEL in the child care outdoor use areas during operat€ng hours, and 45 dBA CNEL in interior areas. These facts are described and quantified in Dra#t EIR chapter 13 (Noise} on pages 13-1 through 13-20, which is hereby incorporated by reference. Impact: Impact 13-2: Project-Facilitated Construction Noise. Construction activities facilitated by the project wauld include building demolition, site grading and preparation, construction of new buildings, and installation o# utilities. Noise levels at 50 feet from the demolition or construction eq�ipment source could ATTY/RE50.2$98/PC RESp RECOMMENDING STANFORD EIR CERTIF'ICAFIOM REV:OS-15-13 VR Page 23 of 5S