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4.8 Noise <br />TableRanges: 4.8-9 Noise <br />Equfpmenf <br />Equipment <br />Noise Levels in dBA L, of 50 Feet <br />Front Loader <br />73 to 86 <br />Trucks <br />82 to 95 <br />Cranes (moveable) <br />75 to 88 <br />Cranes (derrick) <br />86 to 89 <br />Vibrator <br />68 to 82 <br />Saws <br />72 to 82 <br />Pneumatic Impact Equipment <br />83 to 88 <br />Jackhammers <br />81 to 98 <br />Pumps <br />68 to 72 <br />Generators <br />71 to 83 <br />Compressors <br />75 to 87 <br />Concrete Mixers <br />75 to 88 <br />Concrete Pumps <br />81 to 85 <br />Back Hoe <br />73 to 95 <br />Pile Driving (peaks) <br />95 to 107 <br />Tractor <br />77 to 98 <br />Scraper/Grader <br />80 to 93 <br />Paver <br />85 to 88 <br />SOURCE: U.S. EPA 1971 <br />a. Machinery equipped with noise control devices or other noise -reducing design features does not <br />generate the same level of noise emissions as that shown in this table. <br />Noise that would be experienced by sensitive uses due to development associated with implementation <br />of the proposed project is determined at their property lines. While the nearest sensitive uses vary at <br />different locations in and around the Transit Zoning Code (SD 84A and SD 8413) area and as specific <br />development plans have not yet been determined at individual sites, for the purpose of this analysis it is <br />assumed that sensitive receptors could be as close as 50 feet from where construction would take place. <br />Sensitive receptors in the project vicinity could experience noise levels up to 86 dBA Leg as a result of <br />construction activities, or as high as 107 dBA L.9 in the event that pile drivers are used. The City of Santa <br />Ana Municipal Code, Section 18-314(e) allows for noise resulting from construction activities to be <br />exempt from noise limits established in the Code. In accordance with the Noise Ordinance, construction <br />activities would also be limited to the hours of 7:00 A.M. and 8:00 P.M. Monday through Saturday, and is <br />prohibited on Sundays and federal holidays. As construction would not occur except during the times <br />permitted in the Noise Ordinance, and as the Municipal Code, Section 18-314(e) of the Municipal Code <br />allows construction noise in excess of standards to occur between these hours, the proposed project <br />would not violate established standards. <br />City of Santa Ana Transit Zoning Code (SD 84A and SD 84B) EIR 4.8-21 <br />