Useful power
Useful power means, with regard to a cogeneration unit, electricity or mechanical energy made available for use, excluding any such energy used in the power production process (which process includes, but is not limited to, any on-site processing or treatment of fuel combusted at the unit and any on-site emission controls).
Source
40 CFR § 97.302
Scoping language
The terms used in this subpart and subparts BBBB through IIII shall have the meanings set forth in this section as follows: