31A - 1701 E. FAIRHAVEN AVE. - Laserfiche WebLink

Home Browse Search

Threshold of Significance A significant impact would occur when a permanent increase in ambient noise levels of 3db or greater occurs when the existing CNEL is 65dB or greater. Additionally, a significant impact could occur when the stationary noise source of a project or the construction operations of a project is in conflict with the City's Noise Ordinance. A. Exposure of persons to or generation of noise levels in excess of standards established in local general plan or noise ordinance, or applicable standards of other agencies. c. A substantial per.manent increase in ambient noise levels in the project vicinity above levels existing without the project. Less Than Significant Impact Project Area Ambient Noise Level Increases The greatest potential to increase existing ambient noise levels within the project area would be from vehicle traffic generated by the proposed project. Typically a 3 dB increase to the existing ambient noise level would occur when there is a doubling of traffic volumes within a project area. Based on the City of Santa Ana Master Environmental Assessment the proposed project would generate an average of 53 vehicle trips per day. This amount of vehicle trips would have less than a significant impact on existing ambient noise levels within the project area. Stationary Noise Impacts Given the nature of the proposed use, the proposed project would introduce a limited amount of new sources of stationary noises onto the project site. Any stationary noise sources on the project site would have to comply with the City's Noise Ordinance. B. Exposure of persons to or generation of excessive ground borne vibration or ground borne noise levels. Less Than Significant Impact 25 31A~O