SU0014502 - Laserfiche WebLink

Home Browse Search

Administrative Draft Environmental Impact Report Gill Medical Center Project As shown, the existing traffic-generated noise level on Project-vicinity roadways currently ranges from 38.2 to 66.6 dBA CNEL at a distance of 100 feet from the centerline. As previously described, CNEL is 24- hour average noise level with a 5 dBA "weighting" during the hours of 7:00 p.m. to 10:00 p.m. and a 10 dBA "weighting" added to noise during the hours of 10:00 p.m. to 7:00 a.m.to account for noise sensitivity in the evening and nighttime, respectively. It should be noted that the modeled noise levels depicted in Table 4.15-4 may differ from measured levels in Table 4.15-3 because the measurements represent noise levels at different locations around the Project site and are also reported in different noise metrics (e.g., noise measurements are the Leq values and traffic noise levels are reported in CNEL). 4.15.3 Regulatory Setting 4.15.3.1 Federal Occupational Safety and Health Act of 7970 OSHA regulates work site noise levels and protects workers from occupational noise exposure. To protect hearing, worker noise exposure is limited to 90 decibels dBA over an eight-hour work shift (29 CFR 1910.95). Employers are required to develop a hearing conservation program when employees are exposed to noise levels exceeding 85 dBA.These programs include provision of hearing protection devices and testing employees for hearing loss on a periodic basis. 4.15.3.2 State State of California General Plan Guidelines The State of California regulates vehicular and freeway noise affecting classrooms, sets standards for sound transmission and occupational noise control, and identifies noise insulation standards and airport noise/land-use compatibility criteria.The State of California General Plan Guidelines (State of California 2003), published by the Governor's Office of Planning and Research (OPR), also provides guidance for the acceptability of projects within specific CNEL/Ld„ contours.The guidelines also present adjustment factors that may be used in order to arrive at noise acceptability standards that reflect the noise control goals of the community, the particular community's sensitivity to noise, and the community's assessment of the relative importance of noise pollution. State Office of Planning and Research Noise Element Guidelines The State OPR Noise Element Guidelines include recommended exterior and interior noise level standards for local jurisdictions to identify and prevent the creation of incompatible land uses due to noise. The Noise Element Guidelines contain a land use compatibility table that describes the compatibility of various land uses with a range of environmental noise levels in terms of the CNEL. Noise 4.15-12 October 2021