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Munn&Perkins Quarry Excavation Permit The State of California has also established noise insulation standards for new multi=family residential units,hotels,and motels that would be subject to relatively high levels of transportation- related noise.These requirements are collectively known as the California Noise Insulation Standards (Title 24, California Code of Regulations). The noise insulation standards set forth an interior standard of 45 dB Ldn in any habitable room.Where dwelling units are proposed in areas subject to noise levels greater than 60 dB L&,these standards require an acoustical analysis that demonstrates how such units have been designed to meet this interior.standard. Title 24 standards are typically enforced by local jurisdictions through the building permit application process. County Regulations San Joaquin County Noise Element of the General Plan The San Joaquin County Noise Element of the General Plan establishes specific policies to ensure acceptable noise environments for each land use.Applicable policies include the following: Policy 1: The following exterior noise levels shall be considered acceptable: (a) 65 dB Ldn or less for residential development. (b) 60 dB Ldn or less for schools, group care facilities, and hospitals. Policy 4: Development shall be planned and designed to minimize noise impacts on neighboring noise-sensitive areas and to minimize noise interference from outside noise sources. Policy 6: The county shall seek to alleviate existing community noise problems. San Joaquin County Development Title San Joaquin County Code of Ordinances, Title 9-Development Title, Division 10-Development, Chapter 9-1025.9 Performance Standards includes maximum allowable noise exposure levels for transportation and stationary sources,as summarized in Table 3.4-1. The Code standards presented for transportation sources(Part 1)are consistent with the General Plan standards presented above. TABLE 3.4-1 MAXIMUM ALLOWABLE NOISE EXPOSURE PART L•TRANSPORTATION NOISE SOURCES Outdoor Activity Areas' Interior Spaces Noise Sensitive Land Use - dB Ldn dEl Ld„ (Use Types) Residential 65 45 PART II:STATIONARY NOISE SOURCES Outdoor Activity Areas' Daytime2 Nighttime (7 a.m.to 10 p.m.) (10 p.m.to 7 a.m.) Hourly Equivalent Sound Level(Le,),dB 50 .45 Maximum Sound Level(Lmax),dB 70 65 1. 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 be applied on the receiving side of noise barriers or other property line noise mitigaton measures. 2. Each of the noise level standards specified shall be reduced by 5 dB for impulsive noise,single-tone noise,of noise consisting primarily of speech or music. SOURCE: San Joaquin County Code of Ordinances,Title 9-Development Title,Division 10-Development,Chapter 9-1025.9 Performance Standards,2002. Munn&Perkins Quarry Excavation Permit 3.4-8 ESA 1211086 Draft EIR April 2011