2024-053 - Final Supplemental for The Related Bristol Specific Plan Project

Home Browse Search

and would be 76.5 dBA at the closest Phase 1 and Phase 2 residences located 130 feet away. Therefore, Phase 3 construction would not exceed the 80 dBA Leq daytime construction noise level threshold at residential receiver locations. Therefore, construction noise impacts related to Phase 3 would be less than significant. Although noise generated from construction of Phases 1, 2, and 3 would be less than significant, the proposed Project would still be required to implement GPU FEIR Mitigation Measure N-1, which includes construction requirements to limit noise. The proposed Project would result in less impacts than the construction noise impacts that were identified in the GPU FEIR, which were identified as significant. Therefore, construction noise impacts related to the proposed Project would not exceed those previously identified (Draft Supplemental EIR at pp. 5.9-15 through 5.9-16). offsite Construction Noise. The offsite improvements include the installation and upgrade of water, stormwater, and sewer utilities, as well as roadway improvements that include sidewalks, bicycle facilities, landscaping, intersection improvements, median reconstruction, etc. The offsite improvements would include excavators, loaders, and trucks during pavement demolition and trenching activities and pavers, rollers, and loaders for paving activities. Draft Supplemental EIR Table 5.9-1 1 shows that the proposed Project's offsite construction noise would not exceed the FTA's standard. Additionally, when the worst -case offsite noise level (77.4 dBA during demolition) is combined with the worst -case onsite construction noise level (75.7 dBA during Phase 1 demolition), noise levels would be 79.6 dBA, which is below the FTA's 80 dBA standard. Therefore, construction noise impacts from offsite improvements would be less than significant. In addition, GPU FEIR Mitigation Measure N-1, which includes construction requirements to limit noise would be required to be implemented, which would reduce noise generated from proposed Project construction at sensitive receptor locations (Draft Supplemental EIR at pp. 5.9-16 through 5.9-17). Nighttime Concrete Pour Construction Noise. The proposed Project could include nighttime concrete pour activities. The nighttime concrete pours would use the following construction equipment: concrete mixer trucks, concrete pump truck, concrete vibrator, generator, trucks, and air compressors. Draft Supplemental EIR Table 5.9-12 shows that construction noise associated with nighttime concrete pours would be up to 71.0 dBA at the closest offsite sensitive receptors. Therefore, nighttime construction noise would exceed FTA's nighttime threshold of 70 dBA at offsite sensitive receptors and Project Mitigation Measure NOI-1 has been included to require enclosures for stationary (e.g., generators, air compressors, etc.) concrete pour equipment and buffer distances for mobile equipment (including concrete trucks) to minimize nighttime construction noise. Draft Supplemental EIR Table 5.9-12 shows that with implementation of GPU FEIR Mitigation Measure N- 1 and Project Mitigation Measure NOI-1, impacts related to nighttime concrete pour activities at offsite sensitive receptors would be less than significant (Draft Supplemental EIR at pp. 5.9-17 through 5.9-18). Construction Traffic Noise. Noise generated from construction traffic would increase short-term noise; however, these noise levels are temporary and would cease once construction is complete. The trucks associated with construction would occur during the allowable hours for construction specified in the Municipal Code (7:00 a.m. to 8:00 p.m. on weekdays and Saturdays). Trucks ("Including trucks hauling excavated material) would also occur during the allowable daytime hours only. Draft Supplemental EIR Table 5.9-13 shows that construction traffic noise levels would not