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("„ hI Mo Town C:^ nt � 13A of vti, Saantis. Ana Its v« w of I nv�mnm ntal NoNe A naly[�N Page 1:3 of b .kdfie 29, 2023 • According to the Planning Commission staff report, the roof terrace would be equipped with synthetic turf (possibly for sports) a media wall and festival lighting, suggesting nighttime use. The analysis in Section 4.9 of the MEMU EIR does not consider the potential for operational noise impacts associated with the type of outdoor amenities proposed for the project and does not, therefore, demonstrate that any such impact is less than significant. SUMMARY & RECOMMENDATIONS We find that the MEMU EIR/SEIR does not adequately describe the environmental noise setting, nor does it properly evaluate the noise impacts of the Cabrillo Town Center project. In addition, the noise mitigation measures included in the MEMU EIR need to be revised and supplemented to better address project impacts. We therefore recommend that the MEMU EIR/SEIR be supplemented with revised/additional project -specific environmental noise analysis and documentation as follows: Sensitive Receivers & Baseline Ambient Noise Levels Recognize the residential uses within the Lake Dianne Apartments complex — which are the closest sensitive receivers to the project site — and include this area in the noise impact analysis and baseline ambient noise measurements. Conduct 24-hour baseline noise measurements at locations selected to represent baseline ambient noise conditions at all sensitive receivers around the project site. The baseline noise survey should not be limited to locations on busy streets and should accurately reflect conditions at sensitive uses (such as those in the southwest quadrant of the Lake Dianne Apartments property) that are set back and/or shielded from traffic noise sources. Continuous noise monitoring is preferred. However, if continuous monitoring is not feasible at any of the receiver locations, then — at a minimum — the baseline should be established by means of 15- minute readings at each of the following three timeframes: 9AM — 5PM (daytime), 8PM — 10PM (evening) and 1AM — 3AM (nighttime). Thresholds of Significance • Revise the thresholds of significance in the MEMU EIR to include temporary impacts and for consistency with the noise limits in the City of Santa Ana Municipal Code, as follows: Any temporary or permanent noise impact resulting from the project shall be considered significant if either one of the following conditions apply: (1) The project results in noise levels in excess of standards established in the City of Santa Ana Municipal Code or General Plan. (2) The project results in a noise level increase of 5 deA or more. Construction Noise Impacts & Mitigation • Provide a project -specific list of the types of equipment to be used during the various phases of demolition and construction. For each phase and equipment type, identify source noise levels (FHWA reference values) as well as the number of pieces to be employed in that phase. • If the project will deliberately exclude any particularly noisy construction equipment/activities (such as pile -driving) then the project documentation must include a clear statement to this effect. • Revise the construction noise analysis to reflect the total impact of all proposed equipment operating together, rather than a single piece of equipment operating in isolation.