Existing facility
Existing facility means, with reference to a stationary source, any apparatus of the type for which a standard is promulgated in this part, and the construction or modification of which was commenced before the date of proposal of that standard; or any apparatus which could be altered in such a way as to be of that type.
Source
40 CFR § 60.2
Scoping language
The terms used in this part are defined in the Act or in this section as follows: