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7.A. - Page 36 ATfACHMENT 1 Facts in Support of Finding: Implementation of Mitigation 13-3 would reduce project- facilitated groundborne demolition and construction vibration levels to a less- than-significant level by restricting vibration-generating activity and applying quantitative performance standards. These facts are described and quantified in Draft EIR chapter 13 (Noise) on pages 13-1 through 13-20, which is hereby incorporated by reference. Impact: Impact 13-4: Potential Noise from Parking Structure Ventilation System. Noise generated solely by the ventilation system and other mechanical equipment for the potential parking structure at the corner of Bay Road and Barron Avenue could substantially exceed existing ambient levels at residences in the area or the Redwood City Noise Guidelines for Land Use Planning (see Draft EIR Table 13.4) because the parking structure would be located proximate to residences on 2�d Avenue. Mitigation: Mitigation 13-4. During the project detailed design phase for the potential parking structure at the corner of Bay Road and Barron Avenue, the project applicant shall submit an acoustical study to demonstrate how the parking structure design would meet the following noise standards at the most affected receiver: 60 dBA CNEL and 60 dBA Leq-hr daytime (7:00 AM to 7:00 PM), 55 dBA Leq-n� evening (7:00 PM to 10:00 PM), and 50 dBA Leq-n� nighttime (10:00 PM to 7:00 AM). The design measures may include, for example, the installation of silencers and baffles as necessary to reduce the noise level at the nearest residential property line to the existing ambient noise level. Finding: Implementation of Mitigation 13-4 to the satisfaction of the Redwood City Community Development Department would reduce this ventilation noise impact to a less-than-significant level. Facts in Support of Finding: Implementation of Mitigation 13-4 would reduce noise from the parking structure ventilation system proposed for the corner of Bay Road and Barron Avenue, which is near residences on 2�d Avenue, to a less-than- significant level. The mitigation defines maximum allowable decibel levels (performance standards), which are typically met through standard ventilation design measures such as silencers and baffles. These facts are described and quantified in Draft EIR chapter 13 (Noise) on pages 13-1 through 13-20, which is hereby incorporated by reference. Transportation, Circulation, and Parkinq Impact: Impact 7-1: Existing Plus Project Impact on Woodside Road/Broadway Intersection. Under Existing Plus Project conditions during the PM peak hour, project traffic would cause the intersection to degrade from LOS E (59.3 seconds delay) to LOS F (128.8 seconds delay). ATTY/RES0.2901/STANFORD EIR CERTIFICATION REV:08-29-13 VR Page 26 of 56