Air Emissions - Air Emissions At Your Facility

Point Source: Air flow which is actively controlled and directed by fan and exhaust ducting into the atmosphere from a single stationary fixed source such as stack or vent. 

• Examples: Boiler exhaust stack, the exhaust stack of a local ventilation system used to capture emissions from processes that emit volatile organic compounds (VOCs).

Fugitive Emissions Source: Air flow which is passively released into the outdoor environment and is not actively directed through a single exhaust point such as a stack or vent. Air conditioners that use refrigerants in an office environment are also considered fugitive emissions.

• Examples: Screen printing, spot cleaning, or dyeing areas with only general ventilation such as passive sidewall ventilation or windows.

Mobile Emissions Source: Non-stationary sources of emission. 

• Examples: Powered motor vehicles such as forklifts, trucks, passenger vehicles; heavy machinery such as mobile cranes or lifts; and small engines such as landscaping equipment.

Emission from Facility Operations: Emissions from sources that support facility operations, are not the direct result of production processes, and are typically emitted through point source or mobile emissions sources. 

• Examples: Boilers; generators; heating and cooling systems such as combustion heating and refrigerant-containing cooling equipment; and combustion engines.

Emissions from Production: Emissions from production are typically emitted through point sources or as fugitive emissions. 

• Examples: Production processes that use chemicals such as solvents, adhesives, printing, dyeing; emit dust/particulates; produce combustion or other hazardous or toxic air pollutants.