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SANTA ANA REZONE PROJECT <br /> INITIAL STUDY/MITIGATED NEGATIVE DECLARATION <br /> noise level exceeds the third noise limit category, the maximum allowable noise level under that <br /> category shall be increased to reflect the maximum ambient noise level. <br /> Municipal Code Section 18-314 notes that noise sources associated with construction, repair, <br /> remodeling, or grading of any real property are exempt from the noise performance standards of the <br /> Municipal Code, provided said activities do not take place between the hours of 8:00 p.m. and 7:00 <br /> a.m. on weekdays, including Saturday, or any time on Sunday or a federal holiday. <br /> Impact Analysis <br /> Would the project result in: <br /> a) Generation of a substantial temporary or permanent increase in ambient noise <br /> levels in the vicinity of the project in excess of standards established in the local <br /> general plan or noise ordinance, or applicable standards of other agencies? <br /> Short-term Construction Impacts <br /> Less than significant. For purposes of this analysis, a significant impact would occur if construction <br /> activities would result in a substantial temporary increase in ambient noise levels in excess of the <br /> City's established standards applicable to construction noise. <br /> The Municipal Code establishes allowable hours and noise standards for construction activities and <br /> equipment. Construction activities, including the operation of any tools or equipment used in <br /> construction, are restricted between the hours of 7:00 a.m. and 8:00 p.m. Monday through Saturday; <br /> construction activities are prohibited on Sundays and federal holidays. <br /> In addition, while the City has not established quantitative noise level thresholds for construction <br /> activities, this analysis uses the noise limits established by the Federal Transit Administration (FTA)to <br /> determine substantial temporary increase due to construction noise. The FTA identifies construction <br /> noise limits in the Transit Noise and Vibration Impact Assessment Manual. During daytime hours, a <br /> significant temporary increase would be an increase in excess of the average daily noise levels of 80 <br /> dBA Leq(8-hour) as measured at a receiving noise-sensitive land use. <br /> Noise impacts from construction activities associated with the project would be a function of the noise <br /> generated by construction equipment, equipment location, sensitivity of nearby land uses, and the <br /> timing and duration of the construction activities. <br /> Construction Traffic Noise <br /> Haul truck trips, construction worker vehicle trips, and other construction-related trips would occur <br /> over the course of the proposed project's construction. Haul truck trips typically have the greatest <br /> potential to result in substantial off-site noise increases along nearby roadways. The previously <br /> discussed Municipal Code noise limits have no applicability to road-legal trucks operating on public <br /> roads, but the following analysis nevertheless demonstrates that the proposed project's haul trucks <br /> would have a less than significant impact on roadside noise levels in the vicinity of the project site. <br /> FCS r If �j�7 ](}(79 <br /> Https,J/adecinnovationssharepalnf.com/sides/Puhlicatinns5it¢/SharPtl DO ments/Publieatians/Client(PN-1N)/0327l027C047/ISMNO/03270047 Santa Ana Remne Pm,,QWWaDce No. NS-3092 <br /> Page 91 of 118 <br />