33 C.F.R. § 20.311
(a) An administrative proceeding may end in withdrawal without any act by an ALJ in any of the following ways:
(3) With respect to a complaint filed under section 311(b)(6) of the Federal Water Pollution Control Act (33 U.S.C. 1321(b)(6)) or section 109(d) of the Comprehensive Environmental Response, Compensation and Liability Act (42 U.S.C. 9609(b)), by the filing of—
(d) Any respondent may move to dismiss a complaint, the government may move to dismiss a petition, or any party may lodge a request for relief, for failure of another party to—