Reso PC16-23 PC 0116 Reso CEQA - Sandpiper

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Section 4.0—Etwiiminjental Setting and Discussion oflmpacts Table 4.12-2: Construction Equipment 45 -Foot Noise Emission Limits Equipment Type Lmax Level (dBA)1,2 ImpactlContinuous Are Welder 73 Continuous Auger Drill Rig 85 Continuous Backhoe 80 Continuous Bar Bender 80 Continuous Boring Jack Power Unit 80 Continuous Chain Saw 85 Continuous Compressor' 70 Continuous Compressor (other) 80 Continuous Concrete Mixer 85 Continuous Concrete Pump 82 Continuous Concrete Saw 90 Continuous Concrete Vibrator 80 Continuous Crane 85 Continuous Dozer 85 Continuous Excavator 85 Continuous Front End Loader 80 Continuous Generator 82 Continuous Generator (25 KVA or less) 70 Continuous Gradail 85 Continuous Grader 85 Continuous Grinder Saw 85 Continuous Horizontal Boring Hydro Jack 80 Continuous Hydra Break Rain 90 Impact Impact Pile Driver 105 Impact Insitu Soil Sampling Rig 84 Continuous Jackhammer 85 Impact Mounted Impact Hammer (hoe ram) 90 Impact Paver 85 Continuous Pneumatic Tools 85 Continuous Pumps 77 Continuous Rock Drill 85 Continuous Scraper 85 Continuous Slurry Trenching Machine 82 Continuous Soil Mix Drill Rig 80 Continuous Street Sweeper 80 Continuous Tractor 84 Continuous Truck (dump, delivery) 84 Continuous Vacuum Excavator Truck (vac -truck) 85 Continuous Vibratory Compactor 80 Continuous Vibratory Pile Driver 95 Continuous All other equipment with engines larger than five HP 85 Continuous Source: Illingworth & Rodkin, Inc. Acoustics and Air Quality. Notes: Measured at 50 feet from the construction equipment, with a "slow" (one second) time constant. 'Noise limits apply to total noise emitted from equipment and associated components operating at full power while engaged in its intended operation. 'Portable Air Compressor rated at 75 cfm or greater and that operates at greater than 50 psi. City of Redwood City 76 Initial Study/Mitigated Negative Declaration Sandpiper Elementary School facilities Expansion November 2016