## A5.2.3.1 Methodology 

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 ). 

Where: 

E = total emissions of pollutant from the snowmelter for a given time period, expressed in pounds. 

## E = F x EF 

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. 

## Equation A5-5. Total Pollutant Emissions for Snowmelters 

## A5.2.3.2 Emission Factors 

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. 

## A5.2.4 Incinerators 

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. 

## A5.2.4.1 Methodology 

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 ). 

## A5.2.4.2 Emission Factors 

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$_{x }$ 

