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• routed to the street must be directed beneath the sidewalk and through the curb. 5. Prior to the issuance of building permits the proposed project shall submit proof that they have coordination with Orange County Airport Land Use Commission. 6. Prior to the issuance of a grading permit, the project applicant shall prepare an NPDES post-construction storm water management plan, per Orange County Drainage Area Management that includes all Structural and Non-Structural Best Management Practices for the proposed project. 7. The proposed project shall comply with the State of California Noise Insulation Standards. The code requires that interior community noise levels with windows closed, attributable to exterior sources shall not exceed a 45 dB CNEL in any habitable room. 8. Prior to issuance of building permits the applicant shall prepare an acoustical analysis report, prepared under the supervision of a person experienced in the field of acoustical engineering. The report shall show topographical relationship of noise sources and dwelling site, identification of noise sources and their characteristics, predicted noise • spectra at the exterior of the proposed dwelling structure considering present and future land usage basis for the prediction, noise attenuation measures to be applied, and an analysis of the noise insulation effectiveness of the proposed construction showing that the prescribed interior noise level requirements are met. If interior allowable noise levels are met by requiring that windows be unopened or closed, the design for the structure must also specify the means that will be employed to provide ventilation and cooling if necessary, to provide a habitable interior environment. 9. Grading and Building Plans for the proposed project shall specify that construction activities shall be limited to the hours of 7 AM to 8 PM Monday through Saturday, and not permitted on Sundays or federal holidays. No construction activity may occur on Saturdays prior to 8 a.m. (Modified by Planning Commission July 9, 2001.) 10. Prior to issuance of applications for water and fire services the proposed project shall arrange for installation of any new, or relocation or upgrading of any existing, fire protection facilities as required by the Santa Ana Fire Department. These facilities shall be installed in conformance with City Standards and approved plans by the Public Works Agency at the developer's expense. •