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TABLE AQ-8 - EMISSION FACTORS (2020)FOR NONROAD EQUIPMENT AND MOTOR VEHICLES Equipment Model Units ROG CO NOx PM10 - Type year Excavator 2016 g/hp-hr 0.42 1.15 2.86 0.05 Haul Trucks(onsite) 2016 g/hp-hr 0.42 1.15 2.86 0.05 Haul Trucks(onsite) 2020 g/hp-hr 0.16 0.97 2.53 0.03 - Front End Loader 2016 g/hp-hr 0.36 1.11 2.78 0.04 Front End Loader 2020 g/hp-hr 0.15 0.96 2.52 0.03 - Dozer 2016 g/hp-hr 0.23 1.01 2.61 0.03 Grader 2014 g/hp-hr 0.28 3.22 2.63 0.05 - Water Pull 2020 g/hp-hr 0.16 0.97 2.53 0.03 Bobcat Loader 2020 g/hp-hr 0.14 3.18 2.95 0.05 - Maintenance Trucks 2018 g/hp-hr 1.88 36.7 5.18 0.04 Lube&Fuel Truck 2018 g/hp-hr 0.25 1.03 2.65 0.04 Forklift 2014 g/hp-hr 0.37 3.93 3.30 0.09 Pickup Trucks(onsite) g/mile 0.063 2.169 0.140 0.040 Haul Trucks(offsite) g/mile 0.286 1.798 1.830 0.137 SOURCE: California Air Resource Board.2002.EMFAC2002 Version 2.2 and Environmental Protection Agency. _ 1991.Nonroad Engine and Vehicle Emission Study. Dispersion Modeling Dispersion is the process by which atmospheric pollutants disseminate due to wind and vertical stability. The results of a dispersion analysis are used to access pollutant concentrations at or near an emission source. The results of an analysis allow a direct comparison of predicted concentrations of pollutants to air quality or exposure standards. A rising pollutant plume reacts with the environment in several ways before it levels off. First, the plume's own turbulence interacts with atmospheric turbulence to entrain ambient air. This - mixing process reduces and eventually eliminates the density and momentum differences that cause the plume to rise. Second, the wind transports the plume during its rise and entrainment process. Higher winds mix the plume more rapidly, resulting in a lower final rise. Third,the plume interacts with the vertical temperature stratification of the atmosphere,rising as a result of 14