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

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Facts in Support of Findings: Construction Per Section 18-314 (Special Provisions) of the City's Municipal Code noise sources associated with construction activities are exempt from the City's 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 proposed Project's construction activities would occur pursuant to these regulations. Thus, the proposed Project would be in compliance with the City's construction related noise standards. Construction noise would be temporary in nature as the operation of each piece of construction equipment would not be constant throughout the construction day, and equipment would be turned off when not in use. Construction activities would occur throughout the Project site and would not be concentrated at a single point near sensitive receptors. Further, it is unlikely that multiple pieces of equipment would operate within the same area closest to sensitive receptors during Project construction. Because the analysis assumes that the noisiest equipment would operate concurrently at the construction boundary closest to the nearest sensitive receptor, it provides represents a conservative analysis of potential impacts. Construction noise levels drop off at a rate of about 6 dBA per doubling of distance between the noise source and receptor (Draft Supplemental EIR at pp. 5.9-13 through 5.9-15). Phase 1. As shown on Draft Supplemental EIR Table 5.9-8, construction noise for Phase 1 would be as close as 130 feet from the closest offsite residences, at the nearby receiver locations would range from 65.4 to 75.7 dBA Leq, which would not exceed the 80 d ba Leq daytime construction noise level threshold. Therefore, construction impacts related to Phase 1 would be less than significant (Draft Supplemental EIR at p. 5.9-15). Phase 2. Construction activity for Phase 2 would be as close as 410 feet from the closest offsite residences. As shown on Table 5.9-9 of the Draft Supplemental EIR, noise from Phase 2 construction at the closest nearby receiver locations would range from 55.4 to 68.0 dBA Leq. This would not exceed the 80 dba Leq daytime construction noise level threshold. In addition, Phase 2 construction would occur after Phase 1 is occupied. The onsite receptors in Phase 1 would be located as close as 130 feet away from the Phase 2 construction activity area where heavy equipment would be located. The loudest Phase 2 noise level would occur during grading and would be 75.6 dBA at the Phase 1 residences located 130 feet away, which would not exceed the 80 dBA Leq daytime construction noise level threshold at residential receiver locations. Therefore, construction noise impacts to offsite sensitive receptors related to Phase 2 would be less than significant (Draft Supplemental EIR at p. 5.9-15). Phase 3. As shown on Table 5.9-10 of the Draft Supplemental EIR, construction activity for Phase 3 would be as close as 130 feet from the closest offsite residences, and noise from Phase 3 construction at the nearby receiver locations would range from 65.4 to 75.9 dBA Leq. This would not exceed the 80 dBA Leq daytime construction noise level threshold. Therefore, construction noise impacts to offsite sensitive receptors related to Phase 3 would be less than significant. In addition, Phase 3 construction would occur after Phase 1 and Phase 2 are occupied. The onsite receptors in Phases 1 and 2 would be located as close as 130 feet away from the Phase 3 construction activity. The loudest Phase 3 noise level would occur during demolition and grading