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

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LAND USE ELEMENT Noise Exposure Persons living, working, or othelWise visiting the City are subject to noise from a variety of sources. While traffic noise from major roadways and freeways within the area are the greatest contributor of noise, stationary sources produce a significant share. Noise is an important consideration in formulating the Land Use Plan, in that the Plan must consider land use compatibility in order to ensure that activities generating high noise levels are not located in areas where noise sensitive land uses are found. City's Noise Control Ordinance - The Santa Ana Noise Ordinance establishes standards for maximum noise levels within residential areas of the City. The exterior noise level standard is 55 dBA from 7 AM to 10 PM, and 50 decibels (dBA) from 10 PM to 7 AM. The interior noise level standard is 55 dBA from 7 AM to 10 PM. and 45 dBA from 10 PM to 7 AM. Standards for impact noise, simple tone noise, speech, music. and any other combination are 5 dBA lower than the above standards, and noise levels exceeding these standards are limited to relatively shorter periods of time. Building Insulation Standards - The California Administrative Code, Title 24, Building Standards. Chapter 2.35 outlines noise insulation performance standards in order to protect persons within new hotels, motels, apartment houses, and dwellings other than detached single- family dwellings. This section of the Government Code requires an interior noise level of 45 dBA or less for residential projects. . Noise Land Use Compatibility - ... Residential uses are normally unacceptable in areas exceeding 65 dB CNEL (Noise Impact Zone 1) and conditionally acceptable in areas between 60 to 65 dB CNEL (Noise Impact Zone 2). (Revised February 2, 2009) A-46 Resolution No. 2009-011 Page 38 of 42