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4 MITIGATION MONITORING AND REPORTING PROGRAM <br />Regulatory Requirements/Mitigation Measures <br />Timing <br />Responsible <br />Monitoring <br />Signature/Date <br />Party <br />Party <br />of Compliance <br />NOISE <br />RR N0I-1 <br />California Building Code: The California Building <br />Prior to <br />Project <br />City of Santa <br />Code (CBC), Title 24, Part 2, Volume 1, Chapter <br />discretionary <br />Applicant <br />Ana Planning <br />12, Interior Environment, Section 1207.11.2, <br />approval <br />Division <br />Allowable Interior Noise Levels, requires that <br />interior noise levels attributable to exterior sources <br />shall not exceed 45 dB in any habitable room. The <br />noise metric is evaluated as either the day -night <br />average sound level (Ldn) or the community noise <br />equivalent level (CNEL), consistent with the noise <br />element of the local general plan. <br />The State of California's noise insulation standards <br />for non-residential uses are codified in the <br />California Code of Regulations, Title 24, Building <br />Standards Administrative Code, Part 11, California <br />Green Building Standards Code (CALGreen). <br />CALGreen noise standards are applied to new or <br />renovation construction projects in California to <br />control interior noise levels resulting from exterior <br />noise sources. Proposed projects may use either <br />the prescriptive method (Section 5.507.4.1) or the <br />performance method (Section 5.507.4.2) to show <br />compliance. Under the prescriptive method, a <br />project must demonstrate transmission loss ratings <br />for the wall and roof -ceiling assemblies and exterior <br />windows when located within a noise environment <br />of 65 dBA CNEL or higher. Under the performance <br />method, a project must demonstrate that interior <br />noise levels do not exceed 50 dBA Leq(1 hr). <br />RR N0I-2 <br />Construction Noise Sources: Section 18-314(e) of <br />During <br />Project <br />City of Santa <br />the Santa Ana Municipal Code prohibits <br />construction <br />Applicant/ <br />Ana Planning <br />construction activities to the hours of 7:00 AM to <br />Construction <br />Division <br />8:00 PM Monday through Saturday. <br />Contractor <br />City of Santa Ana <br />August 2025 <br />4-18 <br />The Village Santa Ana Specific Plan Project <br />Final Supplemental Environmental Impact Report <br />