TITLE 77: PUBLIC HEALTH
CHAPTER I: DEPARTMENT OF PUBLIC HEALTH
SUBCHAPTER r: WATER AND SEWAGE
PART 920 WATER WELL CONSTRUCTION CODE
SECTION 920.ILLUSTRATION A UNCONSOLIDATED FORMATIONS: OVERSIZED DRILL HOLE

Section 920.ILLUSTRATION A   Unconsolidated Formations:  Oversized Drill Hole

 

 

 

 

 

 

 

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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(Source:  Amended at 37 Ill. Reg. 19676, effective November 25, 2013)