On June 26, 2025, the Board issued a final opinion and order in sub-docket A of R20-19 (R20- 19(A)), adopting amendments to the Board’s Part 845 rules on coal combustion residual (CCR) surface impoundments (35 Ill. Adm. Code 845). The amendments, among other things, added obligations and restrictions on using CCR storage units during the closure of CCR surface impoundments. Relatedly, during the first-notice comment period in sub-docket A, the Illinois Environmental Protection Agency proposed that the Board amend Section 845.220 to require that construction permit applications include additional information concerning CCR storage units. However, because Section 845.220 was not included in sub-docket A’s proposed first-notice amendments, the Board opened a sub-docket B of R20-19 (R20-19(B)) to propose the corresponding changes to Section 845.220. In sub-docket B, the Board issued its first-notice opinion and order on May 15, 2025, and its second-notice opinion and order on August 7, 2025.
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