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San Joaquin County Community Environmental Setting, Impacts,and Mitigation Measures <br /> Development Department Noise <br /> r <br /> Table 1.1-4. County of San Joaquin Noise Ordinance: Maximum Allowable Noise Exposure from <br /> Transportation Noise Sources <br /> r <br /> Noise Sensitive-Land Use(Use Types) Outdoor Activity Areas'(dBA Ld„) Indoor Spaces(dBA Ld„) <br /> Residential 65 45 <br /> Administrative Office - 45 <br /> Child Care Services—Child Care Centers - 45 <br /> Community Assembly 65 45 <br /> L Cultural and Library Services - 45 <br /> Educational Services: General - 45 <br /> Funeral and Interment Services--Undertaking 65 45 <br /> Lodging Services 65 45 <br /> Medical Services 65 45 <br /> Professional Services - 45 <br /> a <br /> Public Services(excluding hospitals) - 45 <br /> Public Services(hospitals only) 65 45 <br /> Recreation—Indoor Spectator - 45 <br /> Religious Assembly 65 45 <br /> Where the location of outdoor activity areas is unknown or is not applicable,the noise standard shall be applied at <br /> y the property line of the receiving land use. When determining the effectiveness of noise mitigation measures,the <br /> standards shall be applied on the receiving side of noise barriers or other property line noise mitigation measures. <br /> Impact Analysis <br /> Approach and Methodology <br /> This analysis focuses on the potential noise impacts on existing noise-sensitive <br /> land uses as a result of the Project. Potential noise impacts associated with <br /> mining activities were assessed by assuming a worst-case noise scenario for <br /> operation of typical heavy equipment in the project area. Construction noise <br /> assessment methods recommended by the U.S. Department of Transportation <br /> (FPA 1995)were used in the noise prediction modeling of stationary sources <br /> associated with mining operations. <br /> The potential exposure of residential uses to both traffic and equipment noise was <br /> evaluated using the Federal Highway Administration Traffic Noise Model <br /> _ (FHWA TNM). Modeling input data were developed using traffic data provided <br /> in the Traffic and Circulation Analysis prepared for the Project(Omni Means <br /> 2005)and published equipment noise emission levels. Mining and aggregate <br /> processing equipment were modeled as"user-defined vehicles" in TNM. Noise <br /> levels were evaluated under the following conditions. <br /> ■ Existing(Year 2004). <br /> ■ Year 2027 Base(No-Project). <br /> DeSilva Gates Quarry Project <br /> Draft Environmental Impact Report 3.J-7 <br /> AS 05705.05 <br />