AUTHORITY: Implementing Section 9.8 and authorized by Sections 27 and 28 of the Environmental Protection Act [415 ILCS 5/9.8, 27 and 28].
SOURCE: Adopted in R97-13 at 21 Ill. Reg. 15777, effective November 25, 1997; amended in R05-11 at 29 Ill. Reg. 8848, effective June 13, 2005; amended in R18-22 at 43 Ill. Reg. 441, effective December 26, 2018.