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Landfill Off-Road Equipment Noise Calculations for the Project <br />Equipment Type1 <br />USDOT <br />Equipment Type2 <br />No. <br />Equipment1 <br />Acoustical <br />Usage <br />Factor2 <br />Maximum <br />Noise Level <br />@ 50 feet <br />(Lmax)3 <br />Typical <br />Noise Level <br />@ 50 feet <br />(dBA1) <br />Reference <br />Distance <br />(D1) <br />Distance to <br />Receptor <br />(D2) <br />Ground <br />Absorption <br />Constant (G) <br />Maximum <br />Noise Level at <br />Receptor <br />(dBA2) <br />Typical <br />Noise Level <br />at Receptor <br />(dBA2) <br />Maximum <br />Noise Level <br />Scenario <br />Typical <br />Noise Level <br />Scenario <br />Unit:%dBA Lmax dBA Leq feet feet unitless dBA Lmax dBA Leq dBA Lmax dBA Leq <br />Soil Compactor Compactor (ground)1 20 82 75 50 2000 0.5 42 35 <br />Emergency Pump Pumps 2 50 77 74 50 2000 0.5 37 34 <br />Genie Lift Man lift 1 20 85 78 50 2000 0.5 45 38 <br />Loader Front End Loader 6 40 80 76 50 2000 0.5 40 36 <br />Scraper Scraper 2 40 85 81 50 2000 0.5 45 41 <br />Sweeper Vacuum Street Sweeper 2 10 80 70 50 2000 0.5 40 30 <br />Landfill Compactor Compactor (ground)4 20 82 75 50 2000 0.5 42 35 <br />Dozers Dozer 6 40 85 81 50 2000 0.5 45 41 <br />Backhoe Backhoe 2 40 80 76 50 2000 0.5 40 36 <br />Grader Grader 2 40 85 81 50 2000 0.5 45 41 <br />Skid Steer Backhoe 1 40 80 76 50 2000 0.5 40 36 <br />KUBOTA Tracker Tractor 1 40 84 80 50 2000 0.5 44 40 <br />Tarpomatic Landfill Covers Dozer 2 40 85 81 50 2000 0.5 45 41 <br />Backup Alarm Backup Alarm4 1 5 80 67 50 2000 0.5 40 27 <br />Notes: <br />dBA2 = dBA1 + 10 * log10(D1/D2)2+G L = 10 * log10 (10^(L1/10)+10^(L2/10) …+10^(Ln/10)) <br />Where:Where: <br />dBA2 = Noise level at receptor L = Combined noise level <br />dBA1 = Noise level at reference distance L1 = Noise level for first noisiest piece of equipment <br />D1 = Reference distance L2 = Noise level for second noisiest piece of equipment <br />D2 = Receptor distance Ln = Noise level for the nth noisiest piece of equipment <br />G = Ground absorption constant (0 for hard surface, 0.5 for soft surface) <br />1 The type of construction equipment is based on construction equipment list provided by the applicant. <br />2 U.S. Department of Transportation, 2006. FHWA Highway Construction Noise Handbook, Table 9.1. August. <br />3 Federal Transit Administration, 2018. Transit Noise and Vibration Impact Assessment Manual, Table 7-1. September. <br />4 National Cooperative Highway Research Program (NCHRP), 1999. Mitigation of Nighttime Construction Noise, Vibrations, and Other Nuisances. NCHRP Synthesis 218. <br />5 California Department of Transportation, 1998. Technical Noise Supplement (TeNS). Equation N-2141.2. October. <br />58.0 44.0 <br />Noise level at the receptor calculated based on the following equation:4 Combined noise levels at receptor using decibel addition: <br />21202-23 Noise Cal PS Page 2 of 3