2025-041 - Certifing Final Supplemental Enviromental Impact for The Village

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• Surround stationary equipment with noise barriers or utilize a temporary noise barrier to block the line of sight from such equipment to nearby off-site residences/sensitive receptors. • Identify minimum separation distances between mobile equipment (e.g., concrete mixer trucks, concrete pump trucks, etc.) and residences/sensitive receptors. Additionally, the City finds that the Project will implement the following regulatory requirements RR NOI-1 through RR NOI-3 (Draft Supplemental EIR, p. 4.9-4): RR NOI-1: California Building Code: The California Building Code (CBC), Title 24, Part 2, Volume 1, Chapter 12, Interior Environment, Section 1207.11.2, Allowable Interior Noise Levels, requires that interior noise levels attributable to exterior sources shall not exceed 45 dB in any habitable room. The noise metric is evaluated as either the day-night average sound level (Ldn) or the community noise equivalent level (CNEL), consistent with the noise element of the local general plan. The State of California's noise insulation standards for non-residential uses are codified in the California Code of Regulations, Title 24, Building Standards Administrative Code, Part 11, CALGreen. CALGreen noise standards are applied to new or renovation construction projects in California to control interior noise levels resulting from exterior noise sources. Proposed projects may use either the prescriptive method (Section 5.607.4.1) or the performance method (Section 5.507.4.2)to show compliance. Under the prescriptive method, a project must demonstrate transmission loss ratings for the wall and roof-ceiling assemblies and exterior windows when located within a noise environment of 65 dBA CNEL or higher. Under the performance method, a project must demonstrate that interior noise levels do not exceed 50 dBA Leq(1hr). RR NOI-2: Construction Noise Sources: Section 18-314(e) of the Santa Ana Municipal Code prohibits construction activities to the hours of 7:00 AM to 8:00 PM Monday through Saturday. RR NOI-3: Stationary Noise Sources: Section 18.312 of the Santa Ana Municipal Code establishes standards for stationary noise sources. Explanation of the Rationale: The rationale and facts supporting the above finding are fully developed in Section 4.9, Noise, pages 4.9-20 through 4.9-32 of the Draft Supplemental EIR. The following presents a summary of that rationale: The Project operational noise impacts would result in less than significant impacts. The Project's construction noise would not have the potential to exceed the FTA's construction noise criterion of 80 dBA Leq. Furthermore, Project construction activities would comply with the construction hours specified in Section 18-314(e) of the Santa Ana Municipal Code, which restricts construction activities to the daytime hours of 7:00 a.m. to 8:00 p.m., Monday through Saturday. The only exception would be for nighttime concrete pours, which would occur a maximum of 2 nights per phase, should continuous pours be necessary for geotechnical considerations. Noise Resolution No, 2025-041 Page 80 of 140