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San Joaquin County Community Environmental Setting,Impacts,and Mitigation Measures Development Department Noise ordinance. Further,noise associated with work performed by private or public utilities in the maintenance or modification of its facilities are also exempted from the provisions of the County's noise ordinance. The regulations pertaining to stationary and transportation noise sources are discussed below. Stationary Noise Sources. The County's code stipulates that proposed noise- sensitive land uses that will be affected by stationary noise sources shall be — required to mitigate the noise from these stationary sources so that resulting noise levels do not exceed the noise level standards specified in Table 33-3. This provision does not apply to proposed noise-sensitive land uses on infill lots. — Further,the County's code stipulates that noise from new stationary sources or the expansion of existing stationary sources shall be mitigated so as not to exceed the noise level standards specified in Table 3.J-3. — Table 3.J-3. Maximum Allowable Outdoor'Noise Exposure from Stationary Sources _ Daytime Nighttimeb Noise Level Descriptor (7:00 a.m.-10:00 p.m.) (10:00 p.m.-7:00 a.m.) Hourly(dBA,Les) 50 dBA 45 dBA Maximum level(dBA,L..) 70 dBA 65 dBA a Where the location of outdoor activity areas is unknown or is not applicable,the noise _ standard shall be applied at the property line of the receiving land use. When determining the effectiveness of noise mitigation measures,the standards shall he applied on the receiving side of noise barriers or other property line noise mitigation measures. — b Each noise level standard specified shall be reduced by 5 dB for impulsive noise, single-tone noise,or noise consisting primarily of speech or music. In cases where the ambient noise level exceeds the County noise standard,the County normally applies a standard equal to the ambient noise level plus 3 dB (Appendix N). — Transportation Noise Sources. The County's code stipulates that proposed noise-sensitive land uses (excluding noise-sensitive land uses on infill lots)that will be affected by existing or planned transportation noise sources shall be required to mitigate the noise so that the resulting noise levels do not exceed the noise level standards specified in Table 3.J-3. For noise-sensitive land uses on _ infill lots, the code stipulates that noise from existing or planned transportation noise sources shall be mitigated so that resulting noise levels do not exceed the interior noise level standards specified in Table 3.J-4. DeSilva Gates Quarry Project — Draft Environmental Impact Report 3.J-6 J&S 05105.05 -