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

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KO- 1/26/09 City of Santa Ana AIRPORT ENVIRONS ELEMENT December 18, 2008 60 dB(A) CNEL NOISE CONTOUR: The noise impact in this zone includes moderate noise levels of 60 dB(A) CNEL or greater but less than 65 dB(A) CNEL. Pursuant to California Noise Insulation Standards, Title 25, California Code of Regulations, singie event noise exposure leveis in this area may create serious disturbances to inhabitants. Residential units in this area should be mitigated to address present and projected noise exposure. The residential interior noise level shall not exceed 45 dB(A) CNEL. In the City of Santa Ana, this impact area zone is designated in the General Plan for Industrial and Commercial land uses and, therefore, there are no noise incompatibilities. HEIGHT RESTRICTIONS The ALUC has adopted the Federal Aviation Regulations (FAR) Part 77 as the criteria for determining height restrictions in Orange County. The allowable height of structures surrounding an airport is described in FAR Part 77 as the allowable height at which safe movement of aircraft occurs. The regulation requires that notice be given to the FAA by a person proposing to construct a structure that would exceed specified heights and/or would be erected at specified sites (see Exhibit II-B). The height that is specified for which notice is required is any structure extending above a 100:1 slope of an imaginary surface extending outward for 20,000 feet from the nearest runway at JWA (see Exhibit II-C). Beyond the 100:1 imaginary surface, FAR Part 77 requires notification to FAA for any project that will be more than 200 feet in height above the ground level pursuant to FAR Part 77 Section 77.13. The ALUC considers and recognizes the FAA as the single authority for analyzing project impact on an airport or aeronautical operations or navigational-aid procedures. The ALUC also considers the FAA as the authority for reporting the results of such studies and project analyses. The ALUC will not consider the findings of reports or studies conducted by parties other than the FAA uniess the FAA certifies and adopts such findings as true and correct. The ALUC understands that the FAA will make a final determination of whether the proposed project falls into one of the following categories: 1. The project is neither an obstruction nor hazard to air navigation, 2. The project is an obstruction to air navigation, but it is not a hazard and the FAA will establish conditions for lighting and marking the buildings; or, [1\ III ~ANTA AN~":'",'P, ::\\ , I 9 Resolution No. 2009-011 Page 19 0142