Biogas

Biogas means a mixture of biomethane, inert gases, and impurities that meets all the following requirements:
(1) It is produced through the anaerobic digestion of renewable biomass under an approved pathway.
(2) Non-renewable components have not been added.
(3) It requires removal of additional components to be suitable for its designated use (e.g., as a biointermediate, to produce RNG, or to produce biogas-derived renewable fuel).

Source

40 CFR § 80.2

Scoping language

The definitions of this section apply in this part unless otherwise specified. Note that many terms defined here are common terms that have specific meanings under this part.