Item 41 - Amendment Application No. 2022-01 and Appeal Nos. 2022-01 and 2022-02

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Community Plan Exemption Checklist City of Santa Ana Gary Avenue Business Park Project Provisions) of the City of Santa Ana Municipal Code would minimize impacts from construction noise, as construction would be limited to daytime hours. Therefore, no new impacts related to construction activities would occur. Operation The proposed Project would consist of the development of an industrial building. Potential noise impacts associated with the operations of the proposed Project would be from Project -generated vehicular traffic on the nearby roadways and from onsite activities, which have been modeled and identified below. Mechanical Equipment. Stationary noise sources related to long-term operation of the Project would include mechanical equipment. Mechanical equipment (e.g. heating ventilation and air conditioning [HVAC] equipment) typically generates noise levels of approximately 52 dBA at 50 feet. At 700 feet away, the location of the dialysis center, mechanical equipment noise would attenuate to 29.1 dBA, which is below the City's 65 dBA standard. Therefore, no new impacts would occur. Truck and Loading Dock Noise. During loading and unloading activities, noise would be generated by the trucks' diesel engines, exhaust systems, and brakes during low gear shifting braking activities; backing up toward the docks; dropping down the dock ramps; and maneuvering away from the docks. Loading or unloading activities would occur on the east and southeast side of the Project site. Vehicular access to the proposed Project site would consist of two driveways along Garry Avenue on the east/northeast side of the Project site. Typically, heavy truck operations generate a noise level of 68 dBA at a distance of 30 feet. At 700 feet northeast of the proposed loading areas, the dialysis center would experience truck noise levels of approximately 40.6 dBA, which is below the City's acceptable limits of 65 dBA for residential noise. Additionally, these noise levels would also be further attenuated by the intervening structures. Loading dock doors would also be surrounded with protective aprons, gaskets, or similar improvements that, when a trailer is docked, would serve as a noise barrier between the interior warehouse activities and the exterior loading area. This would attenuate noise emanating from interior activities, and as such, interior loading and associated activities would be permissible during all hours of the day. Noise levels associated with trucks and loading or unloading activities would not exceed the City's standards and no new impacts would occur. Parking Noise. The Project would provide parking stalls, trailer parking stalls, and loading spaces on the north and south of the proposed warehouse building near the site perimeter. Traffic associated with parking lots is typically not of sufficient volume to exceed community noise standards, which are based on a time - averaged scale such as the CNEL scale. The instantaneous maximum sound levels generated by a car door slamming, engine starting up, and car pass-bys range from 53 to 61 dBA at 50 feet. Conversations in parking areas may also be an annoyance to adjacent sensitive receptors if any. Sound levels of speech typically range from 33 dBA at 50 feet for normal speech to 50 dBA at 50 feet for very loud speech. It should be noted that parking lot noises are instantaneous noise levels compared to noise standards in the hourly Leq metric, which are averaged over the entire duration of a time period. Actual noise levels over time resulting from parking lot activities would be far lower than the existing ambient noise levels identified above. Parking lot noise would occur within the surface parking lot on -site and would be up to 38.1 dBA at the nearest sensitive receptor (which is below the City's 65 dBA threshold) located approximately 700 feet away. Parking lot noise also currently occurs at the adjacent properties under existing conditions. Parking lot noise would be consistent with the existing noise in the vicinity and would be partially masked by background noise from traffic along Garry Avenue and SR-55. Therefore, no new noise impacts from parking lots would occur from the Project. Off -Site Traffic Noise. As detailed in Section 5.17, Transportation, Table T-1, the proposed Project would result in a reduction of trips by 915 daily PCE trips, which include 137 less trips in the AM peak hour and 126 less trips in the PM peak hour than the existing three office buildings. Due to the decrease in traffic, no new traffic related noise impacts would result from the Project. 79