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64. Prior to issuance of building permits, building plans shall reflect the <br />construction of noise barriers to ensure an exterior noise level of 65 CNEL <br />or less around patios and balconies that are considered open space by <br />the City of Santa Ana. The barriers shall be constructed of materials that <br />provide a surface density of at least four pounds per square foot and shall <br />be continuous (without gaps or gates). The height of the barriers shall be <br />sufficient to reduce the exterior noise level to a CNEL of 65 dB or less, <br />and shall be determined by a qualified acoustical consultant as part of the <br />final engineering design of the project. <br />65. Prior to issuance of building permits, building plans shall specify the STC <br />rating of windows and doors for all residential land uses. Window and door <br />ratings shall be sufficient to reduce the interior noise level to a CNEL of 45 <br />dB or less, and shall be determined by a qualified acoustical consultant as <br />part of the final engineering design of the project. <br />66. Prior to building occupancy, mechanical ventilation shall be installed at the <br />proposed condominiums and residential towers since the interior CNEL <br />standard of 45 dB is to be met with all windows and doors closed. <br />67. Prior to building occupancy, to the extent possible, all equipment shall be <br />enclosed within a building or separate structure. Where this is not <br />possible, barriers may be necessary to shield the equipment from the <br />existing and proposed residential buildings. Depending on the size and <br />style of the equipment, silencers in the intake and exhaust ducts may also <br />be necessary to reduce noise at the residential buildings to an acceptable <br />level. <br />68. Upon project completion, truck deliveries to the restaurant and the retail <br />building shall be restricted to the hours of 7:00 a.m. to 10:00 p.m. Delivery <br />trucks shall not be permitted to idle in the parking lots or loading areas and <br />shall be required to have properly maintained, factory approved mufflers. <br />Delivery truck drivers shall be encouraged to minimize acceleration and <br />maintain reduced vehicle speeds while onsite. <br />69. Demolition and construction plans for the proposed project shall reflect the <br />following note: "During demolition and construction, the contractor shall <br />adhere to all City Noise Ordinance requirements to limit all construction <br />activity, including equipment start-up, to between the hours of 7:00 a.m. <br />and 8:00 p.m. Mondays through Saturdays. No construction shall take <br />place on Sundays or federal holidays. <br />70. During demolition and construction, the contractor shall site all <br />construction staging and storage areas away from sensitive receptors to <br />the furthest extent possible. <br />Resolution No. 2009-021 <br />Page 15 of 20 <br />