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Home My WebLink AboutAppendix I - Noise and Vibration Calculations Appendix G Noise and Vibration Calculations Construction Noise Level @ 50 ft Single Family Residences Distance 50 Demolition 0.000 Site Preparation 86.7 86.700 Grading 86.7 86.700 Building Construction 86.7 86.700 Vibration @ 25 ft Single Family Residences 50 Impact Pile Driver 1.518 0.537 Vibratory Roller 0.21 0.074 Large Bulldozer 0.089 0.031 Large Bulldozer 0.089 0.031 Caisson Drilling 0.089 0.031 Loaded Trucks 0.076 0.027 Jackhammer 0.035 0.012 Small Bulldozer 0.003 0.001 Roadway Construction Noise Model (RCNM),Version 1.1 Report date:4/9/2025 Case Description: ---- Receptor #1 ---- Baselines (dBA) DescriptionLand Use Daytime Evening Night Residences southeast of siteResidential 75 75 75 Equipment Spec Actual Receptor Estimated Impact Lmax Lmax Distance Shielding Description Device Usage(%)(dBA)(dBA)(feet)(dBA) Crane No 16 85 50 0 Grader No 40 85 50 0 Excavator No 40 85 50 0 Dozer No 40 85 50 0 Backhoe No 40 80 50 0 Results Calculated (dBA)Noise Limits (dBA) Day Evening Night Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax Crane 85 77 N/A N/A N/A N/A N/A Grader 85 81 N/A N/A N/A N/A N/A Excavator 85 81 N/A N/A N/A N/A N/A Dozer 85 81 N/A N/A N/A N/A N/A Backhoe 80 76 N/A N/A N/A N/A N/A Total 85 86.7 N/A N/A N/A N/A N/A *Calculated Lmax is the Loudest value.