1. a) Under 35 Ill. Adm. Code 731.110(a) must meet the requirements set forth in 35 Ill. Adm. Code 731, unless the tank is excluded from those requirements under 35 Ill. Adm. Code 731.110(b); or
2. b) Has interim status or a RCRA permit under 35 Ill. Adm. Code: Subtitle G; or
3. c) Is exempt from this Part under Section 615.105.

This Subpart applies to existing underground storage tanks that are located wholly or partially within a setback zone or regulated recharge area and that contain special waste, except that this Subpart does not apply to any existing underground storage tank that:

(Source: Amended at 47 Ill. Reg. 7581, effective May 16, 2023)