Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 920 - WATER WELL CONSTRUCTION CODE
ILLUSTRATION A - Unconsolidated Formations: Oversized Drill Hole
Universal Citation: 77 IL Admin Code ยง ILLUSTRATION A
Current through Register Vol. 48, No. 12, March 22, 2024
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1. Diameter of drill hole must be 3" larger than the outer diameter of the casing or coupling, whichever is greater. 2. Casing must extend a minimum of 20'. 3. Annular space that exists between hole and casing must be filled with bentonite grout or neat cement grout within a maximum of 10 feet of the top of the screen to finished ground surface. |
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