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Mater Dei High School <br />Parking Structure and School Expansion Project <br />r. g <br />Environmental Impact Report <br />distance between construction equipment staging areas and occupied residential <br />areas, and electric air compressors and similar power tools. <br />Construction haul routes shall be designed to avoid noise sensitive uses (e.g., <br />residences, convalescent homes, etc.), to the extent feasible. <br />Noise attenuation barriers (temporary barriers or noise curtains) with a sound <br />transmission coefficient (STC) of at least 20 shall be used along the northern, <br />eastern, and western boundaries of the parking structure site adjacent to nearby <br />residential uses during construction activities associated with the parking <br />structure (all phases except for architectural coating), as well as surrounding the <br />proposed classroom building site during construction activities associated with <br />the proposed classroom budding (all phases except for architectural coating). <br />Noise attenuation barriers constructed at the property lines to a height of 10 feet <br />with an STC rating of at least 20 are capable of reducing noise levels by 7.7 dBA. <br />During construction, stationary construction equipment shall be placed such that <br />emitted noise is directed away from sensitive noise receivers. <br />Construction activities shall not take place outside of the allowable hours <br />specified by the City's Municipal. Code Section 18 -311, Special Provisions (7:00 <br />a.m. and 8:00 p.m, on weekdays and Santidays; construction activities are not <br />permitted on Sundays or legal holidays). <br />1.6 ENVIRONMENTAL EFFECTS WHICH REMAIN SIGNIFICANT <br />AND UNAVOIDABLE AFTER MITIGATION AND FINDINGS <br />The City of Santa Ana, having reviewed and considered the information contained in the Final EIR, <br />Technical Appendices, and the administrative record, finds, pursuant to California Public Resources <br />Code 21081 (a)(3) and CEQA Guidelines 15091 (a)(3), that specific econoti c, legal, social, <br />technological, or other considerations, make infeasible the mitigation measures identified in the Final <br />EIR and, therefore, the project would cause significant unavoidable impact in relation to <br />Aesthetics /Light and Glare (long -term degradation of visual character /quality). <br />AESTHETICS /LIGHT AND GLARE <br />Long -Term Visual Character/ Quality. Project implementation would result in significant <br />impacts related to the long -term degradation of the visual character /quality of the site and its <br />surroundings. <br />Findings <br />1. Changes or alterations have been regacired in, or zncorf orated into, the pqurt that avoid or substantially <br />karen the sign fcant eneironmental effect as identified in the EIR <br />Statement of Facts and Findings 27 June 2015 <br />