2014-069 - Final Environmental Impact Report No. 2014-01

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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR CITY OF SANTA ANA 5. Environmental Analysis NOISE ■ Impact 5.9 -5 Construction activities would result in temporary noise increases in the vicinity of the proposed project. 5.9.9 Mitigation Measures Impact 5.9 -2 9 -1 Prior to issuance of a building permit, applicants for new residential development in the Harbor Corridor Plan shall submit an acoustic report prepared to the satisfaction of the Building Official or their designee to ensure that noise levels at outdoor living areas such as private yards, balconies, and park picnic areas shall not exceed 65 dBA CNEL, and all residential habitable rooms would meet the 45 dBA CNEL interior noise standard. These noise studies would need to be submitted after the precise grading and architectural plans are prepared, but prior to issuance of building permits. The required exterior noise reduction can be accomplished with sound walls or berms, or by site plan/building layout design. The required interior noise reduction can be accomplished with enhanced construction design or materials such as upgraded dual glazed windows and /or upgraded exterior wall assemblies. These features shall be shown on all building plans and incorporated into construction of the project. City inspectors shall verify compliance of the building with the acoustic reports recommendations prior to issuance of a Certificate of Occupancy. Impact 5.9 -3 9 -2 Prior to issuance of a building permit, applicants for new commercial, office, or retail developments in the Harbor Corridor Plan shall submit an acoustic report prepared to the satisfaction of the Zoning Administrator and Building Official or their designee to ensure that the operation of stationary noise sources (i.e., HVAC units, truck deliveries) would not cause a noise increase of more than 5 dBA over the ambient noise levels at any adjacent property. These noise studies would need to be submitted after the precise grading and architectural plans are prepared, but prior to issuance of building permits. This requirement can be accomplished with selection of quieter equipment, judicious site layouts and equipment positioning, and /or equipment enclosures, sound screening, or parapet walls. These features shall be shown on all building plans and incorporated into the construction of the project. City inspectors shall verify compliance of the building with the acoustic reports recommendations prior to issuance of a Certificate of Occupancy. Impact 5.9 -4 9 -3 Prior to issuance of a building permit, applicants for projects within the Harbor Corridor Plan that involve high- vibration construction activities, such as pile driving or vibratory rolling /compacting, shall be evaluated for potential vibration impacts to nearby sensitive receptors. The project developer shall submit a vibration report prepared to the satisfaction of the City of Santa Ana Building Official or their designee to determine if the use of pile October 2014 Page 5.9 -21