Reso13 PC 13-09 2859 Initial Study Mitigated Negative Declaration Kensington

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Policy PS-13.4 In accordance with the Municipal Code and noise standards contained in the General Plan, strive to provide a noise environment that is at an acceptable noise level near schools, hospitals, and other sensitive areas. Policy PS-13.5 Limit the hours of operation at all noise generation sources that are adjacent to noise sensitive areas, wherever practical. Policy PS-13.9 Require noise created by new non-transportation noise sources to be mitigated so as not to exceed acceptable interior and exterior noise level standards. Chapter 24 (Noise Regulation) of the Redwood City Municipal Code establishes noise limits due to parties, dances, meetings or other assemblages of three (3) or more persons on any property during the hours of 8:00 PM and 8:00 AM. Intermittent noise generating events expected as a result of the operation of the proposed parking lot would not be characterized as a party, dance, meeting, or assemblage, all of which would be considered organized or planned gatherings. The quantitative noise limits established Redwood City Municipal Code were not used in the evaluation of parking lot noise. Existing Noise Environment The project is proposed southwest of the intersection of El Camino Real and Oakwood Drive in Redwood City, California. Residences are located adjacent to the southernmost boundary of the proj ect site. Noise monitoring was completed at the site between September 13, 2012 and September 18, 2012 in order to quantify existing ambient noise levels. The noise monitoring survey included one long-term measurement(LT-1) and two short-term (10-minute) measurements (ST-1 & ST- 2), as shown in Figure l. The existing noise environment at the site and in the vicinity results primarily from vehicular traffic on local roadways. Noise measurement LT-1 was made near the residences adjacent to the southernmost boundary of the project site, approximately 75 feet southeast of Oakwood Drive and 315 feet from the center of El Camino Real. Daytime hourly average noise levels ranged from 51 dBA Leq to 57 dBA Leq and nighttime hourly average noise levels ranged from 43 dBA Leq to 51 dBA Leq. Maximum instantaneous noise levels typically ranged from 65 to 70 dBA Lm� during the day and from 55 to 60 dBA Lm� at night. The Community Noise Equivalent Level (CNEL) ranged from 56 to 60 dBA over the 5-day measurement period. Data collected at LT-1 are summarized in Appendix A. Noise measurement ST-1 was made between 10:30 AM and 10:40 AM on Tuesday, September 18 along Oakwood Drive approximately 315 feet from El Camino Real. The 10-minute measurement resulted in an average noise level of 60 dBA Leq. Noise measurement ST-2 was made from 10:50 AM to 11:00 AM on Tuesday, September 18 near El Camino Real. The 10- minute measurement resulted in an average noise level of 69 dBA Leq. 2