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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />NOISE <br />5.9.2 Regulatory Framework <br />To limit population exposure to physically and /or psychologically damaging as well as intrusive noise levels, <br />the federal government, the State of California, various county governments, and most municipalities in the <br />state have established standards and ordinances to control noise. The City of Santa Ana regulates noise <br />through the City of Santa Ana Noise Element and the City of Santa Ana Municipal Code, Article Vl, Noise <br />Control. Potential noise impacts were evaluated based on the noise element, and municipal code. Because the <br />City does not have standards to control vibration, vibration impacts are evaluated according to Federal Transit <br />Administration IFTA criteria to determine whether a significant adverse vibration impact would result from <br />the construction and operation of the proposed project. <br />City of Santa Ana Noise Element <br />The City of Santa Ana, through its general plan, has adopted noise standards for sensitive uses, shown in <br />Table 5.9 -3. <br />Table 5.9 -3 City of Santa Ana Noise Element Standards <br />Category <br />Land Use Category <br />Noise Level (dBA CNEL) <br />Interior' <br />Exteriors <br />Residential <br />Single-family, duplex, multi - family <br />453 <br />65 <br />Institutional <br />Hospital, school classroom /playgrounds <br />45 <br />65 <br />Church, library <br />45 <br />65 <br />Open Space <br />Parks <br />- <br />65 <br />Source. City of Santa Ana General Plan Noise Element. <br />1 Interior areas include but are not limited to: bedrooms, bathrooms, kitchens, living rooms, dining rooms, closets, mmdors/hallmys, private offices, and conference <br />rooms. <br />s Exterior areas are private yards of single- family homes, park picnic areas, school playgrounds, common areas, and private open space such as atriums a balconies. <br />3 Interior noise level requirements are based on a'tlosed window" condition. Mechanical ventilation system or other means of natural ventilation shall be provided per <br />Chapter 12, Section 1305, of the Uniform Building Code. <br />City of Santa Ana Stationary Noise Standard: Noise Nuisance <br />Pursuant to the municipal code, the City restricts noise levels generated at a property from exceeding certain <br />noise levels for extended periods of time. The City applies the noise control ordinance standards <br />(summarized in Table 5.9 -4) to nontransportation fans, blowers, pumps, turbines, saws, engines, and other like <br />machinery. <br />Table 5.9 -4 City of Santa Ana Exterior Noise Standards <br />Receptor /Land Use <br />Time of Day <br />Maximum Permissible Noise Levels (dBA)r•s <br />Lm <br />Las <br />Le <br />La <br />1 L.. <br />10 <br />10 PM to 7 AM <br />50 <br />55 <br />60 <br />65 <br />70 <br />Residential Properties <br />AM to 10 PM <br />55 <br />1 60 <br />65 <br />70 <br />1 75 <br />Source: Santa Ana Municipal Cade, Article VI, Section 1 8-312. <br />1 In the eventrhe alleged offensive noise consists entirelyofimpact noise, simple tone noise, speech, music, <br />noise levels shall be reduced by 5dBA. <br />October 2014 Page 5.9 5 <br />