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As shown in Table 16 the City of Santa Ana has adopted Interior and Exterior noise standards that are <br />applicable to the project. <br />Table 16 <br />City of Santa Ana Interior and Exterior Noise Standards <br />Categories <br />Land Use Categories <br />Interior' <br />Exterior' <br />Residential <br />Single-family, duplex, multi- <br />famil <br />45 s <br />65 <br />Institutional <br />Hospitals, school <br />classrooms/playgrounds <br />45 <br />65 <br />Church, library <br />45 <br />Open Space <br />Parks <br />65 <br />It) Interior areas to include but are not limited to: bedrooms, bathrooms, kitchens, living rooms, dining rooms, closets, <br />corridors/hallways, private offices, and conference rooms. <br />(2) Exterior areas shall mean: private yards of single family homes, park picnic areas, school playgrounds, common areas, <br />private open space, such as atriums on balconies, shall be excluded form exterior areas provided sufficient common <br />area is included within the project. <br />(3) Interior noise level requirements contemplate a closed window condition. Mechanical ventilation system or other means <br />of natural ventilation shall be provided per the Uniform Building Code. <br />Source: City of Santa Ana General Plan Noise Element Table 1, 1982. <br />City of Santa Ana Municipal Code <br />The City of Santa Ana Municipal Code Article VI Noise Control establishes daytime and nighttime <br />permissible sound limits or levels for all residentially zoned properties as well as prohibited noises. <br />These standards apply to all project generated on -site operational noise that may extend to adjacent <br />properties. The City's exterior and interior noise standards as allowed by the Municipal Code are <br />shown below. <br />Section 18-312- Exterior Noise Standards. <br />The following exterior noise standards, unless otherwise specifically indicated, shall apply to all <br />residential property within a designated noise zone. The City of Santa Ana is designated as Noise <br />Zone 1. <br />Exterior Noise Standards <br />Noise Zone <br />Noise Level <br />Time Period <br />1 <br />55dBA <br />7:00AM-10:00PM <br />50dBA <br />10:00PM-7:00AM <br />Section 18-313- Interior Noise Standards. <br />The following interior noise standards, unless otherwise specifically indicated, shall apply to all <br />residential property within a designated noise zone. <br />Interior Noise Standards <br />Noise Zone <br />Noise Level <br />Time Period <br />1 <br />55 dB(A) <br />7700 AM - 10:OO PM <br />45 dB(A) <br />10:00 PM - 7:00 AM <br />Legacy Sunflower Apartments Page 75 <br />Mitigated Negative Declaration — March 14, 2019 <br />