Electric utility steam generating unit
Electric utility steam generating unit means any fossil fuel fired combustion unit of more than 25 megawatts that serves a generator that produces electricity for sale. A unit that co-generates steam and electricity and supplies more than one-third of its potential electric output capacity and more than 25 megawatts electric output to any utility power distribution system for sale shall be considered an electric utility steam generating unit.
40 CFR § 63.41
Terms used in this subpart that are not defined in this section have the meaning given to them in the Act and in subpart A.