AUTHORITY: Implementing Section 17.4 and authorized by Section 27 of the Environmental Protection Act [415 ILCS 5/17.4 and 27].
SOURCE: Adopted in R89-5 at 16 Ill. Reg. 1639, effective January 10, 1992, amended in R96-18 at 21 Ill. Reg. 6569, effective May 8, 1997, amended in R00-17 at 25 Ill. Reg. 10350, effective September 1, 2001; amended in R18-26 at 47 Ill. Reg. 7681, effective May 16, 2023.