Rule 3745-104-04. List of substances

119.03 [Comment: For dates of non-regulatory government publications, publications of recognized organizations and associations, federal rules, and federal statutory provisions referenced in this rule, see paragraph (C) of rule 3745-104-01 of the Administrative Code titled "Referenced materials."] (A) Regulated toxic and flammable substances under section 112(r) of the Clean Air Act are the substances listed in the appendix to this rule. Threshold quantities for listed toxic and flammable substances are specified in the tables. (B) The basis for placing toxic and flammable substances on the list of regulated substances are explained in the notes to the list. View Appendix Last updated March 19, 2026 at 9:41 AM Supplemental Information Authorized By: 3753.02 Amplifies: 3753 4/9/2026 8/13/1999, 3/9/2001, 7/1/2005