Research and development activities
Research and development activities means activities conducted at a research or laboratory facility whose primary purpose is to conduct research and development into new processes and products, where such source is operated under the close supervision of technically trained personnel and is not engaged in the manufacture of products for sale or exchange for commercial profit, except in a de minimis manner.
Source
40 CFR § 63.41
Scoping language
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.