Ill. Admin. Code tit. 35, § 501.252
Frozen Ground
Effective Aug 11, 201438 Ill. Reg. 17661AUTHORITY: Implementing and authorized by Sections 9, 12, 13, 21, 22, and 27 of the Environmental Protection Act [415 ILCS 5/9, 12, 13, 21, 22, and 27].POLLUTION CONTROL BOARD
Soil that is frozen anywhere between the first ½ inch to 8 inches of soil as measured from the ground surface.
(Source: Added at 38 Ill. Reg. 17661, effective August 11, 2014)