3_Exhibit B - Laserfiche WebLink

158850326.2 1/11 Confidential STONERIDGE MALL RESIDENTIAL PROJECT ASSESSMENT OF PROJECT ADHERENCE TO SELECT NOISE MITIGATION MEASURES PER CITY OF PLEASANTON 2012 SEIR MITIGATION MONITORING AND REPORTING PROGRAM (MMRP) Project name Stoneridge Mall Residential Project Project no.1690028201 Recipient Marie Cooper / Perkins Coie LLP Version Final Date October 27, 2022 Prepared by Steve Leiby Checked by Brent Ferren Approved by Brent Ferren Executive Summary The Stoneridge Mall Residential Project (“Project”) would consist of 360 multi-family units in a four- and five-story building with an attached parking structure on a 6-acre site. The Project must comply with the Mitigation Measures (MM) in the City’s 2012 Housing Element Supplemental Environmental Impact Report (SEIR). This report details the study conducted to assess the Project’s adherence to select noise-related mitigation measures from the SEIR. The study assessed the Project’s compliance with Mitigation Measures MM 4.J-2, MM4.J-5c, and MM 4.J-6a. A summary of the results is listed below and detailed within the balance of this report. MM 4.J-2. Assessment of Project’s Potential Construction Vibration Impacts on Neighboring Sensitive Uses. Vibration from on-site construction and construction truck routes were evaluated based on FTA guidelines. Based on the results of the analysis, the vibration limits set in the SEIR were not exceeded at any off-site locations. Therefore, no additional measures are required. MM 4.J-5c. Assessment of Traffic Sound Levels in Outdoor Activity Areas associated with the Project. Traffic sound levels at the outdoor courtyards and rooftop decks were predicted using noise modeling software and road data from the SEIR and California Department of Transportation (“Caltrans”). The analysis found that the limit of Ldn 65 dBA is exceeded for the rooftop deck at the northeast corner of the building. A properly constructed barrier along the north and east sides of the roof deck will result in traffic sounds levels of Ldn 65 dBA or less at the rooftop deck, based on the results of the model. MM 4.J-6a. Assessment of Noise from Stationary (Non-transportation) Sources in the Vicinity of the Project. Noise from non-transportation sources such as rooftop mechanical units and truck activity at a nearby loading dock were evaluated using noise modeling software. Based on the results, sound levels at the property planes and the facades of the Project will not exceed the 60 dBA limit. Therefore, no additional measures are required.