“Categorical Industry” means an industry which has a manufacturing or other operational process which is subject to standards and requirements set forth in Section 307 (b) and (c) of the Federal Clean Water Act, and is listed in Title 40, Code of Federal Regulations, Part 403, Appendix C. (Ord. 92-22 § 2, 1992; Ord. 84-105 § 1, 1984.)