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*AV : 11-1 h WA <br />NOISE ABATEMENT <br />Some areas of Santa Ana are exposed to levels of freeway or rail noise that are <br />considered unacceptable for new residential development. Noise conflicts in such <br />cases can be mitigated by providing barriers between the noise source and the <br />residential use, or by providing sound insulation in existing residences. Generally, <br />barriers should be provided to protect residential uses. <br />Exhibit 4 illustrates transportation noise sources in the City and classifies arterial <br />streets by the expected distance from the arterial where the noise level will exceed <br />60 dB CNEL or Ldn and sound insulation or barriers should be provided to <br />protect residential uses. <br />NOISE PREVENTION <br />Potential noise problems may be prevented by ensuring that planning for <br />residential uses carefully considers proximity to major transportations corridors <br />and other noise generators. Adherence to proper noise -related setbacks for noise <br />sensitive uses can reduce noise to acceptable or desirable levels for those uses. The <br />distance required varies with the expected volume oftraffic. The distance may be <br />reduced by providing walls or berms between the noise source and the use. <br />The graph below indicates the required distance from transportation noise <br />sources to achieve desired noise levels for a range of traffic flows. At the time <br />development takes place, developments proposed in zones that would be <br />incompatible under standards ofthe noise abatement plan are required to include <br />a report indicating how these standards will be achieved. <br />GOALS, OBJECTIVES, POLICIES AND PROGRAMS <br />GOALS <br />Goal 1 <br />Prevent significant increases in noise levels in the community and minimize the <br />adverse effects of currently -existing noise sources. <br />OBJECTIVES <br />1.1 Prevent creation of new and additional sources of noise. <br />1.2 <br />POLICIES <br />1 <br />Reduce current noise levels to acceptable standards. <br />Require consideration of noise generation potential and susceptibility <br />to noise impacts in the sitting, design and construction of new <br />developments. <br />Re <br />7 5 ^ w 6 CITY OF SANTA ANA GENERAL PLAN <br />