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or after 9:00 p.m. on any day. This would essentially restrict construction activities to <br /> these hours, thereby avoiding construction noise during nighttime hours when people <br /> would be most sensitive to noise. However, daytime noise could potentially exceed <br /> County noise standards at nearby residences. Mitigation described below would reduce <br /> noise generated by construction equipment to a level that would be less than significant. <br /> TABLE 3-5 <br /> CONSTRUCTION EQUIPMENT NOISE LEVELS <br /> Maximum Level <br /> Type of Equipment (dBA at 50 feet) <br /> Auger Drill Rig 84 <br /> Backhoe 78 <br /> Compactor 83 <br /> Compressor(air) 78 <br /> Concrete Saw 90 <br /> Dozer 82 <br /> Dump Truck 76 <br /> Excavator 81 <br /> Generator 81 <br /> Jackhammer 89 <br /> Paver 77 <br /> Pneumatic Tools 85 <br /> Source:FHWA 2006. <br /> As the project site is currently vacant, the project would be expected to increase the <br /> ambient noise level in the area once construction work is completed. Project operations <br /> would generate noise primarily from vehicle traffic to and from the project site. The <br /> increased noise resulting from project traffic could adversely affect existing residences <br /> along Pock Lane that are near the project site. <br /> Noise levels in the vicinity of the project site were estimated using the Highway Noise <br /> Model, developed by the Federal Highway Administration with input from Caltrans. <br /> Appendix F contains the results of the modeling run. Using the existing noise data for <br /> Pock Lane, which does not cover the entire road, and the estimated daily traffic generated <br /> by the project, traffic on Pock Lane with the project would generate noise levels ranging <br /> from 62.1 to 62.9 dB at 50 feet from centerline. The 65-dB noise contour would extend <br /> from 20 to 25 feet from centerline. Since the residences along Pock Lane are greater than <br /> 25 feet from the road centerline, the estimated noise levels at these residences would be <br /> below the County noise standard for outdoor activity areas. As such, noise impacts from <br /> project traffic would be less than significant. <br /> The project site is in an area with limited development, so few land uses are expected to <br /> be affected by the change in ambient noise. Moreover, the proposed project is a <br /> Pock Lane Public Review Draft IS/MND 3-54 May 2022 <br />