2019-040 - Mainplace Mall Transformation

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City of Santa Ana Addendum to the MainPlace Mall Transformation Proiect Fashion Square Commercial Center Final EIR and loading/unloading activities would be below City standards and ambient noise levels, impacts related to delivery trucks would be less than significant. No new impact would occur. Public and Private Outdoor Amenity and Recreational Areas The proposed Project includes exterior recreation and entertainment areas. The most prominent noise sources at these areas would be gatherings at the proposed plaza area on the east side of the Project site near Main Street. The Acoustical Assessment identified that crowd noise is approximately 62 dBA at one meter from the source (i.e., at the gathering plaza). As a result, crowd noise would be approximately 23 dBA at the closest offsite sensitive receptors that are 300 feet from the site. This noise level would not exceed the City of Orange's 55 dBA exterior noise standard and would be below the existing ambient noise levels. In addition, the proposed residential uses could include outdoor pool areas that would constitute a stationary noise source. Noise at the pool areas would be approximately 67 dBA at 75 feet from the edge of the pool during recreational swimming activities. The closest offsite sensitive receptors would be located approximately 300 feet from the Project site and 340 feet from the closest building. At this distance, noise levels would be approximately 54 dBA, which is below the City of Orange's 55 dBA exterior noise standard and below the existing ambient noise levels in the area. Therefore, the proposed recreational and entertainment areas would not generate noise levels that would increase ambient noise levels or exceed noise standards at the closest offsite sensitive receptors. Therefore, impacts would be less than significant. No new impact would occur. Surface Parking and Parking Structure Noise The proposed Project would utilize parking structures and surface lots, both of which currently exist on the site. The instantaneous maximum sound levels generated by parking lot noise, such as a car door slamming, engine starting up, and car pass-bys range from 60 to 63 dBA. Conversations in parking areas typically range from 33 dBA at 50 feet for normal speech to 50 dBA at 50 feet for very loud speech. Parking lot noise that would occur from the Project would be consistent with the existing noise in the vicinity and would be partially masked by background noise from traffic along 1-5, SR 22, and Main Street. Based on distance attenuation, instantaneous maximum parking noise would be reduced to 47 dBA at the closest offsite sensitive receptor, which is below the City of Orange's 55 dBA standard. Therefore, noise impacts from parking facilities would be less than significant. No new impact would occur. 107