Ill. Admin. Code tit. 35, § 501.265
Lagoon
AUTHORITY: 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
Any excavated, diked or walled structure or combination of structures designed for biological stabilization and storage of livestock wastes.