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4.13.2 REGULATORY SETTING FEDERAL REGULATIONS There are no federal noise regulations directly applicable to the proposed project. STATE REGULATIONS Title 24,Part 2,of the California State Building Code establishes noise standards for all new multifamily residential units.Where exterior noise levels exceed 60 Ld„/CNEL,the code stipulates that an acoustical analysis shall be performed and submitted before construction. The acoustical analysis is required to establish mitigation measures that will limit maximum interior Ld„/CNEL levels to 45 dBA in any inhabitable room. Although there are no generally applicable interior noise standards pertinent to all uses, Califoraiia communities typically adopt an Ld./CNEL standard of 45 dBA as a maximum limit on interior noise in all residential units. The State of California has also developed land use compatibility guidelines for community noise environments. The California State General Plan Guidelines,published by the State Office of Planning and Research(State of California 2003),provides guidance for the acceptability of projects in specific L&fCNEL contours. Generally, residential uses are considered to be acceptable in areas where exterior noise levels do not exceed 60 dBA L&/CNEL. The guidelines also establish exterior noise level standards for other land use types. For instance,noise _ exposure levels that are less than 75 LddCNEL are considered normally acceptable for industrial land uses,and levels less than 70 Ld,fCNEL are considered normally acceptable for office buildings and commercial and professional land uses. However,the state stresses that these guidelines can be modified to reflect sensitivities of individual communities to noise. REGIONAL AND LOCAL REGULATIONS San Joaquin General Plan 2010 The San Joaquin County General Plan Noise Element establishes specific policies to ensure acceptable noise environments for each land use.Applicable policies include: Policy 1.The following exterior noise levels shall be considered acceptable: 65 dB Ldp or less for residential development. . 60 dB Lin 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. ► Implementation 8 (Setbacks). Setbacks should be established along the major noise sources that would assure that noise-sensitive land uses are outside the 60 Lft contour of the noise sources. San Joaquin County Development Title Chapter 9 of the San Joaquin County Development Title includes many provisions related to noise. ► Section 1025.9(Noise Standards).Maximum noise exposure levels permitted at noise-sensitive land uses �^ from transportation(Part 1)and stationary(Part H)noise sources are specified in Table 4.6-2 (reproduced as Table 4.13.4). College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.13-7 Noise