3B Public Hearing 2009 0720 - Laserfiche WebLink

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PLN2008-00030; Cornerstone at San Leandro Crossings Mitigated Negative Declaration Noise March 20, 2009 Implementation of Mitigation Measures #20 through #23, as required, would reduce potential hazards and hazardous materials impacts to a less than significant level. Existing ambient noise in the vicinity of the project site is predominantly due to proximity to the San Leandro BART Station and tracks, vehicular traffic along San Leandro Boulevard, and noise from on-going railroad (SPRR) operations. A noise study conducted for the proposed project assessed the exterior noise environment of the subject properties. After project build out, the noise environment will be dominated by BART operations along the easterly portion of Site 2, by SPRR operations along the westerly portion of Site 2 and by a combination of both to the north and south of the project area. Aircraft -related noise is low and infrequent, with only occasional civil aircraft operations being audible for brief periods. As described in Section 10, Transportation/Traffic, implementation of the proposed project would result in a direct and indirect increase in residents and visitors to the project site over current conditions. The increased activity levels at the project site, in addition to traffic and operation of the proposed project, have the potential to increase noise levels in the vicinity of the project. This potential increase could impact both existing sensitive receptors, as well as new potential residents within the project area. Accordingly, the effects of noise and vibration could have a potentially significant impact. Mitigation Measure #24: Common outdoor use areas and courtyards that are exposed to noise sources exterior to the project shall be provided with noise mitigating design features, such as architectural sound barriers and other noise mitigation set forth in the Wilson Ihrig & Associates, Inc. Noise Study (July 15, 2008) in accordance with CCR Title 24. Public or private balconies are exempt from this requirement pursuant to the Downtown San Leandro TOD Strategy EIR (September 2007). Implementation of Mitigation Measure #24 reduces potential noise impacts to a less than significant level. Transportation and Circulation Implementation of the proposed project would result in a direct and indirect increase in residents and vehicular traffic to the project site over current conditions, as an at -grade asphalt parking lot is replaced with multi -family residential housing (Site 1) and a vacant lot is replaced with a 329 to 345 -space BART parking garage (Site 2). Trip generation calculations adhere to the trip rate assumptions made for the Downtown San Leandro TOD Strategy, as set forth in the TOD Strategy EIR that was certified in 2007. A Traffic Impact Analysis was prepared by Kimley-Horn (February 2009) to examine the transportation impacts of the proposed project on the existing and planned road network, pedestrian and bicycle activity, transit services, parking and operational 13