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*:/:I1-3111ira <br />Existing noise conditions mostly consist of local traffic from Myrtle Street and Raitt Street. The project area <br />falls outside the 65 dBA CNEL contour in the Noise Element, Exhibit 5, Transjiortation Noise Sources. Other <br />existing noise sources include typical residential neighborhood noises. <br />Applicable Noise and Vibration Regulations <br />City of Santa Ana General Plan Noise Element <br />Noise and land use compatibility standards for various land uses are included in the City's General Plan Noise <br />Element as shown in Table 5, Interior and Exterior Noim Standards. <br />Table 5 Interior and Exterior Noise Standards <br />Categories <br />Land Use Categories <br />Interior' <br />Exterior' <br />Residential <br />Single -Family, duplex, multi -family <br />453 <br />65 <br />Hospital, school and classroom/playgrounds <br />45 <br />65 <br />Institutional <br />Church, Library <br />45 <br />— <br />Open Space <br />Parks <br />— <br />65 <br />Source: City of Santa Ana General Plan, Noise Element <br />Notes: <br />' Interior areas (to include but are not limited to: bedrooms, bathrooms, kitchens, living rooms, dining rooms, closets, condors/hallways, private <br />offices, and conference rooms. <br />Exterior areas shall mean: private yards of single-family homes, park picnic areas, school playgrounds, common areas, private open space, such as <br />atriums on balconies, shall be excluded form exterior areas provided sufficient common area is included within the project. <br />' Interior noise level requirements contemplate a closed window condition. Mechanical ventilation system or other means of natural ventilation shall be <br />provided per Chapter 12, Section 1305 ofthe Uniform Building Code. <br />City of Santa Ana Municipal Code <br />The City applies performance standards to stationary (non-transpoftation) noise sources included in Section <br />18.312 of the Municipal Code (referred to here as the "Noise Ordinance") to ensure that noise generating uses <br />do not adversely affect noise -sensitive land uses. <br />The Noise Ordinance specifies noise level criteria at adjacent properties for a specified time period. For <br />residential uses a noise level cannot exceed: <br />■ 55 dBA for more than 30 minutes in an hour (the Lso level during daytime hours (7:00 AM to 10:00 PM), <br />and cannot exceed <br />■ 50 dBA for more than 30 minutes in an hour (the 1 so level during nighttime hours (10:00 PM to 7:00 ANl. <br />■ These standards plus 5 dBA shall not be exceeded for a cumulative period of more than 15 minutes in any <br />hour (the Les level; or <br />■ The noise standards plus 10 dBA shall not be exceeded for a cumulative period of more than 5 minutes in <br />any hour (the Ls 3 level; of <br />75C-110 <br />