Fugitive emissions
Fugitive emissions means those emissions from a stationary source that could not reasonably pass through a stack, chimney, vent, or other functionally equivalent opening. Under section 112 of the Act, all fugitive emissions are to be considered in determining whether a stationary source is a major source.
Source
40 CFR § 63.2
Scoping language
The terms used in this part are defined in the Act or in this section as follows: