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INTRODUCTION Noise is defined as unwanted sound —anything from a barking dog to the clatter of a jackhammer —and can disrupt the way people live and work. Many sources of noise —such as freeways —also produce vibration, which can adversely affect health and well-being. Because of these known effects of noise and vibration, local, state, and federal government agencies have established noise thresholds to protect public health and safety. The greatest source of noise throughout Santa Ana is vehicle traffic on the 1-5, 1-405, SR-22, and SR-55 freeways and the city's large streets. Other major noise sources are Amtrak and Metrolink trains, aircraft departing from and arriving at John Wayne Airport, stationary equipment at commercial and industrial uses, and parks with active sports fields. Certain land uses are more sensitive to noise and vibration. Residential uses, schools, health care centers, libraries, churches, senior homes, and recreational areas are much more sensitive to noise than commercial and industrial uses. Siting new development of any of these sensitive receptors in the vicinity of substantial traffic or noise -intensive industrial uses is considered a land use conflict. The California Building Code and the Santa Ana Noise Ordinance are the City's primary tools to regulate activity and land uses to maintain a healthy noise environment. John Wayne Airport is regulated by the noise requirements of the Federal Aviation Administration and noise standards under the California Code of Regulations. . Industrial uses near residential neighborhoods Some neighborhoods in Santa Ana must contend with the impacts of living nearby industrial districts, including noise from the daily operations of uses such as trash -sorting facilities, auto service and salvage businesses, and metal -processing facilities. t� r r .g..•• CITY OF SANTA ANA GENERAL PLAN