3 - The Bowery - Laserfiche WebLink

Home Browse Search

The Bowery Mixed-Use Project CEQA Findings of Fact City of Santa Ana 30 May 2020 Interior Noise. The roadways near the Project site would generate noise. However, Draft EIR Tables 5.10-12 through 5.10-15 show that based with a “windows closed” condition with standard windows with a minimum Sound Transmission Class (STC) of 27, the interior noise levels of the residential units would be below the 45 dBA CNEL interior noise standard. Therefore, impacts related to interior noise would be less than significant. Impact Finding: The Project would not generate excessive groundborne vibration or groundborne noise levels (Draft EIR at p. 5.10-26). Facts in Support of Findings: Construction Demolition, excavation, and grading activities are required for the Project and can result in varying degrees of ground vibration, depending on the equipment and methods used, distance to the affected structures and soil type. Based on the reference vibration levels provided by the Federal Transit Administration (FTA), a large bulldozer represents the peak source of vibration with a reference velocity of 0.089 in/sec PPV at 25 feet. At distances ranging from 85 to 667 feet from construction, vibration levels are anticipated to range from 0.001 to 0.014 in/sec PPV, as shown on Draft EIR Table 5.10-16. These vibration levels would not be sustained during the entire construction period but would occur only during the times that heavy construction equipment is operating in the vicinity of the sensitive receivers. This level of vibration would be below the Caltrans building damage threshold of 0.3 in/sec PPV and vibration standard of 0.04 in/sec PPV for human annoyance at all receiver locations. Therefore, vibration impacts would be less than significant. Operation Operation of the proposed commercial and multi-family uses would include heavy trucks for residents moving in and out of the rental units, product deliveries to retail and restaurant uses, and garbage trucks for solid waste disposal. Truck vibration levels are dependent on vehicle characteristics, load, speed, and pavement conditions. However, typical vibration levels for the heavy truck activity at normal traffic speeds would be approximately 0.006 in/sec PPV, based on the FTA Transit Noise Impact and Vibration Assessment. Truck movements on site would be travelling at very low speed, so it is expected that truck vibration at nearby sensitive receivers would be less than the vibration threshold of 0.08 in/sec PPV for fragile historic buildings and 0.04 in/sec PPV for human annoyance, and therefore, would be less than significant. Impact Finding: The Project would not expose people residing or working in the Project area to excessive airport noise levels within an airport land use plan or within two miles of a public airport (Draft EIR at p. 5.10-27). Facts in Support of Findings: The exterior noise thresholds outlined in the AELUP, multi-family residential development is considered normally consistent with exterior noise levels of less than 60 dBA CNEL, conditionally consistent with exterior noise levels between 60 and 65 dBA CNEL and normally inconsistent with exterior noise level above 65 dBA CNEL. For commercial retail land use, exterior noise levels are considered normally consistent with exterior noise levels of less than 65 dBA CNEL and conditionally consistent with exterior noise level above 65 dBA CNEL. As shown on Draft EIR Figure 5.10-2, the Project site is located outside the 55 dBA CNEL aircraft noise level contour boundaries of JWA. Therefore, according to the AELUP, the Project residential and commercial retail land use is considered normally consistent with JWA aircraft noise exposure exterior noise level compatibility thresholds. Also, the airport related noise at the Project site does not exceed the City’s municipal code permissible noise levels. Additionally, the County’s General Aviation Noise Ordinance that prohibits 3-52