2 - EIR18-01; DA18-01; GPA18-06; AA18-10_2525 N MAIN STREET

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EIR Mitigation Measure The EIR determined that impacts related to land use and planning would be less than significant and no mitigation measures are required. 3.8 Noise Summary of Impacts Identified in the EIR Construction Noise Standards: The EIR determined that the Original Project would not result in generation of noise levels in excess standards established by the City’s Municipal Code. Per Section 18-314 (Special Provisions) of the City’s Municipal Code noise sources associated with construction activities are exempt from the established noise standards as long as the activities do not take place between the hours of 8:00 p.m. and 7:00 a.m. on weekdays, including Saturday, or any time on Sunday or a federal holiday. The Original Project’s construction activities would occur pursuant to these regulations. Thus, the Project would be in compliance with the City’s construction related noise standards. (DEIR p. 4.8-11.) Temporary Increase in Ambient Noise: The EIR determined that construction activities would generate short-term periodic increases in ambient noise levels at sensitive receptors in the Project vicinity. Therefore, Mitigation Measure NOI-2 was provided to prohibit the use of large mobile equipment (greater than 80,000 pounds) and loaded trucks within 50 feet of the residences to the east of the Project site and Mitigation Measure NOI-3 was included to require installation of a temporary noise barrier that would be a minimum 11-feet high, constructed of frame-mounted materials such as vinyl acoustic curtains or quilted blankets, and attached to the masonry wall along the eastern Project site boundary or temporary fence posts. In addition, due to the location of existing sensitive receptors. The EIR determined that with implementation of Mitigation Measures NOI-2 and NOI-3 temporary and periodic construction noise level increases at receiver locations would be reduced to below the 10 dBA Leq temporary noise level increase threshold. Therefore, with implementation of mitigation, impacts related to periodic temporary increases in noise were determined to be less than significant. (DEIR, pp. 4.8-16 through 4.8-17.) Groundborne Vibration: Construction activities for of the Original Project would generate short-term vibration levels that would exceed the distinctly perceptible vibration standard at receiver locations within 50 feet of large bulldozers usage. Thus, Mitigation Measure NOI-2 was included to prohibit the use of large mobile equipment and loaded trucks within 50 feet of the residences to the east of the Project site. With implementation of this measure, vibration impacts at the nearby sensitive receptors were determined to be less than significant. (DEIR, pp. 4.8-16 through 4.8-17.) Operation Interior Noise: Section 4.8, Noise, of the DEIR, describes that traffic along the roadways near the Project site would generate noise that could exceed interior noise standards within some of the proposed residential units. Thus, some of the residential units would require upgraded windows and sliding glass doors with increased Sound Transmission Class (STC) ratings to meet the interior noise standards. As described in Section 4.8, Noise, of the DEIR, the residential units along N. Main Street would require upgraded windows and sliding glass doors with minimum STC ratings of between 27 and 30 to meet the interior noise standards. Mitigation Measure NOI-1 would ensure that the appropriate windows and doors are installed, which would reduce impacts to a less than significant level. (DEIR, pp. 4.8-10 through 4.8-13.) Traffic Generated Noise: Section 4.8, Noise, of the DEIR, also describes that operation of the Original Project would generate a one dBA Community Noise Equivalent Level (CNEL) increase in traffic-related noise, which is less than the 3 dBA CNEL threshold for areas above 60 CNEL and less than the 1.5 dBA CNEL threshold for areas above 65 CNEL. Thus, the EIR determined that traffic noise impacts would be less than significant. 2-157