2009-011 - Adopting Airport Environs Element and Amending the Land Use

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City of Santa Ana AIRPORT ENVIRONS ELEMENT December 18. 2008 TABLE 1 Interior and Exterior Noise Standards LAND USE CATEGORIES CNEL Categories Uses Interior 1 Exterior 2 Residential Single-family. duplex, multi-family 45 65 Institutional Hospital, school classrooms/playgrounds 45 65 Church, librarv 45 -- ODen SDace Parks -- 65 NOTES: 1. Interior areas (to include but are not bedrooms, bathrooms, kitchens, living rooms, limited to): dining rooms, closets. corridors/hallways, private offices, and conference rooms. 2. Exterior areas shall mean: private yard of single-family homes park picnic areas school playgrounds common areas private open space, such as atriums and balconies, shall be excluded from exterior areas provided sufficient common area is included within the project 3. Interior noise level requirements contemplate a closed window condition. Mechanical ventilation system or other means of natural ventilation shall be provided per Chapter 12, Section 1305 of the Uniform Buildinn Code. 65 dB(A) CNEL NOISE CONTOUR: Impacts in the 65 dB(A) CNEL Noise Contour are sufficient to warrant restrictions on residential uses and may require sound attenuation measures. All residential uses are deemed inconsistent in this area unless it can be shown that such units are sufficiently mitigated to address present and projected noise exposure which may include, but is not limited to, avigation easements and sound attenuation. This exposure shall be the energy sum of all noise impacting the project, so as not to exceed an interior standard of 45 dB(A) CNEL. lm()f~ANTA ANA+\j;~ Noise sensitive institutional uses such as schools, churches. hospitals, libraries, and other noise-sensitive land uses may also be inconsistent in this zone unless it can be shown conclusively that such units are sufficiently mitigated to address present and projected noise 4 Resolution No. 2009-011 Page 14 of 42