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INITIAL STUDY/MITIGATED NEGATIVE DECLARATION FAIRVIEw BRIDGE REPLACEMENT AND STREET IMPROVEMENTS <br />(9TH STREET TO 16TH STREET) PROJECT <br />w <br />`J" <br />MAY 2020 <br />SANTA ANA, CALIFORNIA <br />3.13 NOISE <br />Less Than <br />Potentially <br />Significant with <br />Less Than <br />Significant <br />Mitigation <br />Significant <br />No <br />Impact <br />Incorporated <br />Impact <br />Impact <br />Would the project result in: <br />a. Generation of a substantial temporary or permanent <br />increase in ambient noise levels in the vicinity of the project <br />El <br />® <br />El <br />❑ <br />in excess of standards established in the local general plan or <br />noise ordinance, or applicable standards of other agencies? <br />b. Generation of excessive groundborne vibration or <br />❑ <br />❑ <br />® <br />❑ <br />groundborne noise levels? <br />c. For a project located within the vicinity of a private airstrip <br />or an airport land use plan or, where such a plan has not <br />been adopted, within 2 miles of a public airport or public use <br />❑ <br />❑ <br />❑ <br />airport, would the project expose people residing or working <br />in the Droiect area to excessive noise levels? <br />3.13.1 Existing Setting <br />This section is based on the Noise Study Report44 (NSR; Appendix A) and Noise Abatement Decision <br />Report (NADR; Appendix A)45 prepared for the Project. <br />The City of Santa Ana addresses noise in the Noise Element of the General Plan46 and in the <br />Municipal Code.47 The City's interior and exterior noise standards are shown in Table 3.13.A below. <br />Section 18-314 in Article IV, Noise Control, of the City's Municipal Code states that construction <br />activities are exempt from the City's noise standards provided said activities do not take place <br />between the hours of 8:00 p.m. and 7:00 a.m. on weekdays and Saturday, or any time on Sunday or <br />a federal holiday. <br />Table 3.13.A: Interior and Exterior Noise Standards, dB CNEL <br />Category <br />Land Use Category <br />Interior' <br />Exterior' <br />Residential <br />Single-family, duplex, multifamily <br />453 <br />65 <br />Institutional <br />Hospital, school classroom/playground <br />45 <br />65 <br />Church, library <br />45 <br />- <br />Open Space <br />Parks <br />- <br />65 <br />Interior areas (including but not limited to bedrooms, bathrooms, kitchens, living rooms, dining rooms, closets, corridors/hallways, <br />private offices, and conference rooms). <br />Exterior areas shall mean private yards of single-family homes, park picnic areas, school playgrounds, common areas, and private open <br />space such as atriums on balconies, and shall be excluded from exterior areas provided sufficient common area is included within the <br />project. <br />Interior noise level requirements contemplate a closed -window condition. A mechanical ventilation system or other means of natural <br />ventilation shall be provided per Chapter 12, Section 1305, of the Uniform Building Code. <br />44 LSA Associates, Inc. 2019c. Noise Study Report. January. <br />45 LSA Associates, Inc. 2019b. Noise Abatement Decision Report. June. <br />46 City of Santa Ana. 1998c. City of Santa Ana General Plan Noise Element. September 20. <br />47 City of Santa Ana. 2019b. op. cit. <br />R:\WKE1702\ISMND\Final ISMND\Fairview Street Bridge Final ISMND.docx (05/26/20) 3-71 <br />