AUTHORITY: Implementing and authorized by Sections 4, 9.1(d), 9.1(e), 39, 39(f)(2), 39.1(c) and 39.1(d) of the Environmental Protection Act [415 ILCS 5].
SOURCE: Adopted at 4 Ill. Reg. 10, p. 246, effective February 22, 1980; former Part repealed and new Part adopted at 8 Ill. Reg. 8197, effective June 1, 1984; amended at 17 Ill. Reg. 9684, effective June 10, 1993; amended at 22 Ill. Reg. 19253, effective October 13, 1998; amended at 42 Ill. Reg. 15997, effective August 1, 2018; amended at 44 Ill. Reg. 10873, effective June 10, 2020.