Section 11-453-21 - Designation of extremely hazardous substances and hazardous substances(a) This section designates the extremely hazardous substances and hazardous substances subject to release notification requirements contained in section 11-453-23.(b) Extremely hazardous substances are those substances and quantities listed in title 40 Code of Federal Regulations part 355, appendices A and B, as amended. (c) Hazardous substances are defined in section 128D-1, HRS, and designated in section 11-451-5.[Eff NOV 05 2010] (Auth: HRS §§ 128D-1, 128E-1, 128E-6, 128E-7) (Imp: HRS §§ 128D-1, 128E-1, 128E-6, 128E-7)