are provided. EPA provides emission factors for two types of industrial/commercial incinerators:  multiple chamber and single chamber. The type of incinerator design should be obtained from  the airport operator.  Many major airports operate on-site aircraft rescue and firefighting (ARFF) training facilities. In  these specialized training facilities, fuel is burned in a pit or a mockup of an aircraft to simulate  emergency situations that may occur on airport grounds. Fire training activities are a periodic  source of emissions. The amount of fuel burned (e.g., Jet-A, propane, diesel, and tekflame fuels)  and time of burning depends upon the particular training exercise bei ng performed and type of  equipment in use. The number of training fire events is also used in the calculation.  Air pollutants from the burning of training fires at airports include PM $_{10}$, PM$_{2.5}$, CO, NO$_{x}$, SO$_{2}$,  and VOC. Emission factors for these pollutants depend upon the type of fuel burned, and are  estimated based on measured emissions from the uncontrolled burning of each fuel. Using these  emission factors, total pollutant emissions from a training fire can be calculated using following methodology.  Emissions from training fires at airports are estimated by determining the quantity of fuel burned  in each fire and multiplying by the emission factors to calculate the total pollutant emissions to  the atmosphere for each simulated fire event. The total number of fire training events per year is  then used to determine the total annual emissions.  Total emissions from one training fire may be estimated by applying  Equation A5-7  ( Total  Pollutant Emissions for Training Fires ).  A5.2.5.1  Methodology  Where:  E = total emissions of pollutant from the incinerator for a given time period, expressed either  in pounds or tons (e.g., pounds per year).  F = total mass of waste burned for a given time period, expressed in tons.  UEF = uncontrolled emission factor of pollutant (i.e., CO, SO$_{2}$, PM$_{10}$, PM$_{2.5}$, NO$_{x}$, or VOC),  expressed in pounds per ton of waste burned.  CF = air pollution control factor, expressed as a percentage.  Equation A5-6. Total Pollutant Emissions for Incinerators  E = F x UEF x (1- CF/100)  A5.2.5  Fire Training Facilities  APPENDIX A5$_{ }$ 28$_{ }$ 25  EPA, AP-42, Chapter 2.1,  Refuse Combustion,  http://www.epa.gov/ttnchie1/ap42/ch02/final/c02s01.pdf. 