AUTHORITY: Implementing and authorized by Section 39(a) of the Environmental Protection Act (Ill. Rev. Stat. 1989, ch. 111½, par. 1039(a)).
SOURCE: Emergency rule adopted December 2, 1974, amended rule filed March 1, 1976, effective March 11, 1976; rules repealed, new rules adopted at 8 Ill. Reg. 3286, effective March 7, 1984; amended at 12 Ill. Reg. 3472, effective January 22, 1988; amended at 14 Ill. Reg. 18289, effective October 30, 1990.