Process unit
Process unit means components assembled to produce, as intermediate or final products, one or more of the chemicals listed in 60.489 of this part. A process unit can operate independently if supplied with sufficient feed or raw materials and sufficient storage facilities for the product.
Source
40 CFR § 60.481
Scoping language
As used in this subpart, all terms not defined herein shall have the meaning given them in the Act or in subpart A of part 60, and the following terms shall have the specific meanings given them.