APPENDIX A5$_{ }$ A5.2.3.1  Methodology  A5.2.3.2  Emission Factors  A5.2.4  Incinerators  A5.2.4.1  Methodology  A5.2.4.2  Emission Factors  24 EPA, AP-42, Chapter 1,  External Combustion Sources,  http://www.epa.gov/ttn/chief/ap42/ch01/final/c01s00.pdf.  27$_{ }$ Pollutant emissions from snowmelters are calculated by multiplying the fuel consumption rate by  the emission factor specific to each pollutant. Specific information on type of equipment and fuel  should be obtained from the airport operator.  Total pollutant emissions from a snowmelter  may be estimated by applying  Equation A5-5  ( Total Pollutant Emissions for Snowmelters ).  E = F x EF  Equation A5-5. Total Pollutant Emissions for Snowmelters  Emission factors for  each pollutant for sources such as snowmelt ers may be  found within  Chapter 1,  External Combustion Sources 24 ,  of EPA’s AP-42.  Incinerators at airports are likely small industrial or commercial combustors for the disposal of  food wastes (e.g., from international flights) or other refuse. Large municipal waste combustors  (MWC) are unlikely to be operated at airports. Emissions are dependent on the total mass of  waste burned for a given time period.  Pollutant emissions from incinerators are calculated by multiplying the mass of waste burned by  the emission factor for each specific pollutant multiplied by the air pollution control factor.  Emissions from incinerators are sometimes controlled by scrubbers or gas -fired afterburners.  Information on equipment and control efficiency should be obtained from the airport operator.  Total pollutant emissions from an incinerator may be estimated by applying  Equation A5-6  ( Total Pollutant Emissions for Incinerators ).  Uncontrolled emission factors based on the type of incinerator are given in Chapter 2.1,  Refuse  Combustion 25 , of EPA’s AP-42. Uncontrolled emission factors for PM, SO$_{2}$, CO, VOC, and NO$_{x }$ Where:  E = total emissions of pollutant from the snowmelter for a given time period, expressed in  pounds.  F = total quantity of fuel burned, expressed in thousands of gallons of fuel or million cubic feet  for natural gas, for a given time period.  EF = emission factor of pollutant (i.e., CO, SO$_{2}$, PM$_{10}$, PM$_{2.5}$, NO$_{x}$, or VOC), expressed in pounds  per thousand gallons of fuel or million cubic feet for natural gas. 