What is the difference between an emission unit and an emission point?
An emission unit is the equipment, process or location where emissions are generated. This also includes equipment/processes with the potential to emit air pollutants. One emission unit may have several associated processes. An emission point is the location where emissions enter the atmosphere. This could be a stack, vent or exhaust. One emission unit may have more than one emission point such as a paint booth with two stacks. Also, one emission point may be venting emissions from more than one emission unit such as two boilers venting to the same stack.
