Ill. Admin. Code tit. 77, § 920.ILLUSTRATION B
Unconsolidated Formations: Mechanically Driven Casing
Effective Aug 1, 200024 Ill. Reg. 11934AUTHORITY: Implementing and authorized by the Illinois Water Well Construction Code [415 ILCS 30].DEPARTMENT OF PUBLIC HEALTH
(Source: Amended at 24 Ill. Reg. 11934, effective August 1, 2000)