2009-025 - Final Environmental Impact Report No. 2004-02

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• VII. Noise As detailed in the EIR, construction operations would increase existing noise levels for the short term, and residential land uses would be subject to significant adverse long-term noise impacts. Mitigation measures were included in the EIR to reduce noise impacts to a less than significant level. Would the project result in: a) Exposure of persons to or generation of noise levels in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? (No Substantial Change from Previous Analysis) The EIR identified short-term noise impacts from on-site demolition and construction activities. The primary source of construction noise is heavy equipment. The mitigation measures in the EIR reduced potentially significant short-term construction noise impacts to a less than significant level. The EIR identified long-term noise impacts as mobile source noise impacts from traffic, aircraft noise impacts from John Wayne Airport, and operational noise from the operation of the project components. However, the removal of the restaurant/retail and office/lofts component of the project, in addition to the conversion from condominium to apartment uses for the Lake Towers and the low-rise residential component, will reduce traffic by 758 daily trips. This is an additional benefit in conjunction with the mitigation measures in the EIR, which reduced potentially significant long-term noise impacts to a less than significant level. The addition of the hotel in the proposed project is anticipated to generate noise. However, implementation of the mitigation measures from the EIR and the additional mitigation measures in Section VII.c below will reduce impacts to a less than significant level. Development of the project • will have no new or more severe impacts beyond those addressed in the EIR. Therefore, the EIR remains adequate and complete with respect to this topic. b) Exposure of persons to or generation of excessive groundborne vibration or groundborne noise levels? (No Substantial Change from Previous Analysis) Mitigation measures were identified to reduce noise impacts in the EIR. As detailed in the EIR, the Noise Study concluded that construction will generate excessive groundborne vibration or groundborne noise levels. However, because this will only occur during the construction phase of the project, the Noise Study concluded that this impact is not considered significant. Construction of the Cinema Lofts and the retaiUrestaurant component of the project have been eliminated and a 185-room hotel will be constructed in its place. Construction of the proposed hotel is expected to produce groundborne vibration or groundborne noise levels comparable to the retail/restaurant and the Cinema Lofts previously planned on site. Mitigation measures in the EIR will be implemented to reduce groundborne vibration/noise levels. These findings and the related mitigation measures from the EIR also apply to the proposed project. Development of the project will have no new or more severe impacts beyond those addressed in the EIR. Therefore, the EIR remains adequate and complete with respect to this topic. c) A substantial permanent increase in ambient noise levels in the project vicinity above levels existing without the project? (No Substantial Change from Previous Analysis) Operational noise impacts resulting from the retaiUrestaurant uses will no longer apply because the 8,580 square feet of restaurant and 5,291 square feet of retail development are no longer a part of the project. The hotel, which is a new component replacing the retail/restaurant uses, will be open 24 hours a day, 7 days a week. It is anticipated that noise will be comparable to that previously analyzed. In • Resolution No. 2009-025 Page 39 of 95 MacArthur Place South EIR Addendum 41