Organic group
Organic group means structures that contain primarily carbon, hydrogen, and oxygen atoms.
Source
40 CFR § 63.2550
Scoping language
For an affected source complying with the requirements in subpart SS of this part 63, the terms used in this subpart and in subpart SS of this part 63 have the meaning given them in 63.981, except as specified in 63.2450(k)(2) and (m), 63.2470(c)(2), 63.2475(b), and paragraph (i) of this section.