06 16 20 PWA_02_02 Exh2 - IS-MND

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L w FAIRVIEw BRIDGE REPLACEMENT AND STREET IMPROVEMENTS INITIAL STUDY/MITIGATED NEGATIVE DECLARATION J" (9TH STREET TO 16TH STREET) PROJECT MAY 2020 SANTA ANAL CALIFORNIA Therefore, groundborne vibration and noise impacts generated by construction equipment would be less than significant. No mitigation measures are required. Operation. Once operational, the proposed Project would generate a minimal amount of additional traffic, and regional traffic trips are expected to remain the same. Roads are not typically major sources of groundborne noise or vibration. Groundborne vibration is mostly associated with passenger vehicles and trucks traveling on roads with poor conditions (e.g., potholes, bumps, expansion joints, or other discontinuities in the road surface). Vibration effects of passenger vehicles and trucks (e.g., rattling of windows) are almost always a result of airborne noise. The proposed Project would consists of asphalt pavement that was resurfaced in August 2018. As a result, there are no potholes, bumps, or other discontinuities in the road surface that would generate groundborne vibration or noise impacts from vehicular traffic traveling on Fairview Street. Therefore, groundborne vibration and noise impacts generated by vehicles traveling through the Project area would be less than significant. No mitigation is required. c. For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within 2 miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? No Impact. The closest airport to the Project site is John Wayne Airport, which is located approximately 6.6 mi southeast of the Project site; however, the Project site is not located within the Airport Land Use Plan. The proposed Project would not expose people residing or working in the Project area to excessive noise levels from aircraft noise because the Project site is located more than 2 mi from John Wayne Airport, the Project site is not located within an Airport Land use Plan, and the proposed Project would not involve the introduction of residential or employment uses in the Project area. There would be no impact, and no mitigation is required. 3.13.3 Mitigation Measures Mitigation Measure NOI-1 Construction Noise Control. During construction, the Construction Contractor will implement the standard noise controls provided below and will adhere to City of Santa Ana (City) Municipal Code construction noise restrictions. The Construction Contractor will provide the City Public Works Director or designee with documentation that the following requirements were adhered to during construction activities: During all Project area excavation and on -site grading, the Project contractors will equip all construction equipment, fixed or mobile, with properly operating and maintained mufflers consistent with manufacturers' standards. 3-84 R:\WKE1702\ISMND\Final ISMND\Fairview Street Bridge Final ISMND.docx (05/26/20)