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ARROYO LAGO RESIDENTIAL PROJECT ADDENDUM 156 FCS Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480036/Addendum/21480036 Arroyo Lago Residential Project Addendum.docx c) Airport or Private Airstrip Noise Would the project result in: For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? Prior FEIR Conclusions The Prior FEIR determined that a significant impact would occur if the County Project were located in the vicinity of a private airstrip or within an airport land use plan area or, where such a plan has not been adopted, within 2 miles of a public airport or a public use airport and exposed people residing or working in the vicinity to excessive noise levels. The project site is approximately 1.6 miles southwest of Livermore Municipal Airport and is subject to the ALUCP. The project site is located outside the 55, 60, and 65 dBA CNEL noise contours shown in the ALUCP (Figure 3-2, Noise Compatibility Zones). Therefore, the Prior FEIR concluded that implementation of the County Project would not expose residents to airport-related noise levels that exceed normally acceptable standards for residential development. Therefore, the Prior FEIR concluded that impacts would be less than significant. (Draft EIR, pp. 3.12-25, 6-17). Proposed Project Analysis and Conclusion As discussed in the Prior FEIR, a significant impact would occur if the proposed project would expose people residing or working in the project area to excessive noise levels for a project located in the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within 2 miles of a public airport or public use airport. The proposed project would occupy the same site as the County Project evaluated in the Prior FEIR and would remain approximately 1.6 miles southwest of Livermore Municipal Airport, within the area subject to the Livermore ALUCP. The project site continues to be located well outside the 55, 60, and 65 dBA CNEL noise contours shown in the ALUCP. Exposure to aircraft-related noise would therefore be the same as previously evaluated in the Prior FEIR (although there would be a slight reduction of people exposed, given the nominal reduction in unit count). As such, consistent with the impact conclusions of the Prior FEIR, implementation of the proposed project would not expose persons residing or working in the vicinity to noise levels from airport activity that would be in excess of normally acceptable standards, and impacts would be less than significant. Therefore, the proposed project would not introduce new significant impacts or create substantially more severe significant impacts than those previously identified. No additional analysis is required. Zone 7 Stormwater Option The Zone 7 Stormwater Option would not result in any new or more severe noise impacts compared to those previously analyzed since it was considered in the Prior FEIR. By eliminating construction and operation of the detention basin, pump facilities, and storm drain force main (as contemplated in the City Stormwater Option), this option would incrementally reduce construction-related equipment