Ill. Admin. Code tit. 35, § 501.260
Impermeable
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
Not permitting significant passage of fluids under the usual pressure differences found in constructed livestock waste-handling facilities.