ARCHIVED REPORTS_DRAFT ENVIRONMENTAL IMPACT REPORT

Home Browse Search

(3) Noise levels within buildings meant for human occupancy shall not exceed an L&of forty-five (45) dB. (4) Noise studies prepared for noise-sensitive land uses shall address how noise levels in outdoor areas mobile sources shall be maintained at or below an L&of sixty(60) dB. City of Manteca City of Manteca General Plan The Noise Element of the City of Manteca General Plan 2023 (City of Manteca 2003b)identifies goals, standards, and policies designed to ensure that City residents are not subjected to noise beyond acceptable levels. A general objective of the Noise Element is to protect existing noise-sensitive development(e.g.,hospitals, schools, churches, and residences) from new uses that would generate noise levels incompatible with those uses and, conversely, discourage noise-sensitive uses from locating near sources of high noise levels. The Noise Element establishes noise criteria for determining land use compatibility for new land uses affected by transportation noise sources; these are not directly applicable to this project. The Noise Element also establishes maximum allowable noise performance standards for stationary noise sources,which are shown in Table 4.4-7. Several policies and implementation measures contained in the general plan's Noise Element specifically address noise issues associated with stationary sources and construction and may be relevant to this analysis. Table 4.4-7 City of Manteca General Plan Performance Standards for Stationery Noise Sources or Projects Affected by Stationary Noise Sources Noise Level Descriptor(dBA) Daytime Nighttime (7 a.m.-10 p.m.) (10 p.m.-7 a.m.) Hourly Equivalent Sound Level(Leg) 50 45 Maximum Sound Level(L,,.) 70 65 Notes: Each of the noise level standards specified above shall be reduced by 5 dBA for simple noise tones,noises consisting primarily of speech or music,or recurring impulsive noises.Such noises are generally considered by residents to be particularly annoying and are a primary source of noise complaints.No standards have been included for interior noise levels.Standard construction practices should,with the exterior noise levels identified,result in acceptable interior noise levels. Source:City of Manteca 2003b Policy N-P-4: The City shall require stationary noise sources proposed adjacent to noise sensitive uses to be mitigated so as to not exceed the noise level performance standards in Table 4.4-7. Policy N-P-5: In accord with Table 4.4-8 standards,the City shall regulate construction-related noise impacts on adjacent uses. Implementation Measure N-I-3: In making a determination of impact under the California Environmental Quality Act(CEQA), a substantial increase will occur if ambient noise levels are increased by 10 dB or more. An increase from 5-10 dB may be substantial. Factors to be considered in determining the significance of increases from 5-10 dB include: (a) The resulting noise levels; (b) The duration and frequency of the noise; (c) The number of people affected; EDAW Manteca WQCF and Collection System Master Plans EIR Noise 4.4-14 City of Manteca