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NOISE <br /> Less Than <br /> Potentially Significant Less Than <br /> Significant With Significant No Impact Beneficial Information <br /> Impact Mitigation �p�f �P�f Source(s) <br /> Incorporated <br /> Would the project result in: <br /> 6) For a project within the vicinity of a � � � � � 1,2,3 <br /> private airstrip,would the proj ect <br /> expose people residing or working in <br /> the project area to excessive noise <br /> levels? <br /> 4.12.3.1 Noise Impacts to the Project <br /> Traffic Related Noise <br /> Vehicular traffic noise along El Camino Real currently generates noise levels greater than the City's <br /> acceptable noise level standards. Traffic volumes are expected to increase in the project area in the <br /> future due to planned growth. <br /> Based on the current and projected noise data in the General Plan,the proposed residential facility <br /> fronting El Camino Real would be exposed to exterior noise levels of approximately 70-75 dBA. <br /> The courtyard area would be somewhat shielded from traffic noise by the proposed building and the <br /> adj acent hotel. <br /> Interior noise levels within new residential buildings are required to be maintained at or below 45 <br /> dBA. Exterior noise levels above 60 dBA could preclude achieving interior noise levels of 45 dBA <br /> or less. Interior noise levels would vary depending on the design of the building, construction <br /> materials, and construction methods. Standard residential construction provides approximately 15 <br /> dBA of noise reduction with windows partially open and 20 dBA of noise reduction with windows <br /> closed. Where exterior noise levels are in excess of 65 dBA, standard construction techniques alone <br /> will not reduce interior noise to an acceptable level. <br /> Impact NOI-L• Implementation of the proposed project could expose future residents to <br /> interior noise levels in excess of acceptable City and State standards for <br /> residential development. (Significant Impact) <br /> Mitigation Measures: The following measures are included in the project to reduce significant <br /> long-term noise impacts: <br /> MM NOI 1-l: A qualified acoustical consultant will review final site plans,building <br /> elevations, and floor plans prior to construction to calculate expected interior <br /> noise levels as required by City policies and state noise regulations. Project- <br /> specific acoustical analyses are required by the California Building Code to <br /> confirm that the design results in interior noise levels of 45 dBA or lower. <br /> The specific determination of what noise insulation treatments (i.e., sound <br /> rated windows and doors, sound rated wall construction, acoustical caulking, <br /> protected ventilation openings, etc.) are necessary will be conducted on a unit <br /> Kensington Assisted Living Facility Project 69 Initial Study <br /> Redwood City Apri12013 <br />