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III. Environmental Setting, Impacts,and Mitigations <br /> H. Noise <br /> TABLE III.H.2: TYPICAL CONSTRUCTION NOISE LEVELS <br /> Construction Phase Noise Level WBA.L .)/a/ <br /> Ground Clearing $4 <br /> Excavation 89 <br /> Foundations 78 <br /> Erection 85 <br /> Finishing 89 <br /> /a/ Average noise levels 50 feet from the noisiest source and 200 feet from the rest of the equipment <br /> associated with a given construction phase. <br /> SOURCE: Bolt, Beranek,and Newman, 1971,Noise from Construction Equipment and Operations, <br /> Building Equipment, and Home Appliances,prepared for U.S.Environmental Protection <br /> Agency. <br /> TABLE III.H.3: TYPICAL CONSTRUCTION EQUIPMENT SOUND LEVELS <br /> Typical sound level <br /> Construction Equipment (dBA at 5Q fL) <br /> Dump.Truck 88 <br /> Portable Air Compressor 81 <br /> Concrete Mixer(Truck) 85 <br /> Jackhammer 88 <br /> Scraper 88 <br /> Dozer 87 <br /> Paver 89 <br /> Generator 76 <br /> Piledriver 105 <br /> Rock Drill 98 <br /> Pump 76 <br /> Pneumatic Tools 85 <br /> Backhoe 85 <br /> SOURCE: Federal Register, 1974,Vol. 39,No: 121. <br /> III.H.I I <br />