SU0007300 - Laserfiche WebLink

Home Browse Search

3.4 Noise 71 f The San Joaquin County Code of Ordinances,Title 9-Development Title,Division I'0- Development, Chapter 9-1025.9 Performance Standards also includes the following provisions, which are applicable to this project: (a)(2)Private development projects that include the development of new transportation'facilities or.the expansion of existing transportation facilities shall be required to mitigate the noise . levels from these transportation facilities so that the resulting noise levels on noise-sensitive p—, land uses within and adjacent to said development projects do not exceed the standards specified in Table 3.4-1,Part I. (b)(2)Proposed projects that will create new stationary noise sources or expand existing stationary noise sources.shall be required to mitigate the noise levels from these stationary noise sources so as not to exceed the noise level standards specified in Table 3.4-1, Part U. !� (c)(3)Noise associated with construction, provided such activities do not take place before " 6:00 a.m.or after 9:00 p.m.on any day,shall be exempt from the noise provisions in Table 3.4-1. l.. (d)The Review Authority shall require the preparation of an acoustical study in instances where it has determined that a project may expose existing or proposed noise-sensitive land uses to noise levels exceeding the noise standards specified in Table 3.4-1.This determination shall be based on the existing or future 65 dB L&noise contour in the [San Joaquin County]General Plan,the proximity of new noise-sensitive land uses to known noise sources,or the knowledge that a potential for adverse noise impacts exists. (f) The outdoor operation of any industrial,commercial,or residential property maintenance tool or equipment powered by an internal combustion engine or electric motor including, but not limited to, leaf blower,chainsaw, lawn mower, hedger,and vacuum cleaner is prohibited t.. within 500 feet of a residence located in a residential zone between the hours of 9:00 p.m. and 8:00 a.m. Noise Leve!Increase Criteria ! Based on studies of test subject's reactions to changes in environmental noise levels for similar noise sources,the Federal Interagency Commission on Noise(FICON)developed the following recommendations for thresholds to be used in assessing the significance of project-related noise R level increases for transportation noise sources. Where background noise levels without the project would be less.than 60 dB Lam„ a 5 dB or greater noise level increase due to the project would be ;' considered significant. Where background noise levels.without the project would be in the range of 60-65 dB Ld,,, a 3 dB or greater noise Ievel increase due to the project would be considered significant. Finally,where background noise levels without the project would exceed 65 dB Ldn, a 1.5 dB or greater noise level increase due to the project would be considered significant. This graduated scale is based on findings that people in quieter noise environments would tolerate larger increases in noise levels without adverse effects,whereas people already exposed to elevated noise levels exhibited adverse reactions to noise for smaller increases. I r Munn&Perkins quarry Excavation Permit 3.4-9 - ESA 1211086 Draft EIR APM 2011 3e-n k r a