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BENDER READY-MIX CONCRETE MANUFACTURING PROJECT Initial Study/Mitigated Negative Declaration Two of the primary factors that reduce levels of environmental sounds are increasing the distance between the sound source to the receiver and having intervening obstacles such as walls, buildings, or terrain features between the sound source and the receiver. Factors that act to increase the loudness of environmental sounds include moving the sound source closer to the receiver, sound enhancements caused by reflections, and focusing caused by various meteorological conditions. STATE OF CALIFORNIA The State Office of Planning and Research 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 Community Noise Equivalent Level (CNEL), CITY OF SANTA ANA The Noise Element of the City's General Plan quantifies the community noise environment in terms of noise exposure for both near- and long-term levels of growth and traffic activity; refer to Table 4.12-1, General Plan Noise Standards. The standards are intended to be used as one of the many factors used in the land use planning process. Table 4.12-1 General Plan Noise Standards . i _. J'._- - .,.. - - Allnuiahld htmn nrnvnle"1AC16t>;_ -- Lategones - Uses - - - Interlar °-° EkferilJr Residential Single-family, duplex, multi-family 45 65 Institutional Hospital, school classroom) la rounds 45 65 Church, library 45 - Open Space Parks - 65 Source: City of Santa Ana, City of Santa Ana General Plan Noise Element. SeDtember 20. 1982 The City's standards for governing environmental noise are set forth in Chapter 18, Article VI (Noise Control) of the City's Municipal Code. The City has also adopted community noise control standards within Chapter 18, Article VI (Noise Control) of the City's Municipal Code in order to limit unnecessary, excessive and annoying noise in the City; refer to Table 4.12-2, Municipal Code Noise Standards. Table 4.12.2 Municipal Code Noise Standards lnterr6r Exterior - - Categor[es s ?laes lnteriorNolse Interior Noise Exterior Noise Exterior Noise , ?z. f?-1l .ifi t ., Level (Leq) L.evei'(Leq) Level (Leq) _ LeVe1 (Leq) . Tara to 1O PM tp m to lam lam to 1Q 10 m o lam EZone 1 Entire City 55 45 55 50 Louwce. yny of oama Hna municipal Gone. Section 18-314, Special Provisions, of the Municipal Code specifies the following construction-related noise standards: The following activities shall be exempted from the provisions of this article: JULY 2011 4.12-2 NOISE 31A-76 fl I 1