PURPOSE: This rule describes the minimum standards for a properly constructed test hole.

1. (1) Standards for Construction of Test Holes. All test holes shall be constructed in a manner that will conserve and protect the groundwater resources and not be a source or channel of contamination or pollution to any aquifer.
2. (2) Casing Material. All casing used in the construction of a test well must meet or exceed standards set out in 10 CSR 23-3.030.
3. (3) Casing Depth. If permanent surface casing is set, it must be set at least fifty feet (50') into bedrock. Temporary surface casing lengths may be determined by the permitted contractor.
4. (4) Temporary Cap. All holes must be capped during the period they remain unplugged.
5. (5) Hole Size. Test hole size will be determined by the person owning the mineral rights or designing the hole.
6. (6) Approved Grout. When a hole is grouted, procedures and materials set out in 10 CSR 23-3.030(3) and (4) must be followed. 10 CSR 23-6

AUTHORITY: sections 256.606 and 256.626, RSMo 1994.* Original rule filed Aug. 17, 1993, effective March 10, 1994. Amended: Filed Nov. 1, 1995, effective June 30, 1996.

*Original authority: 256.606, RSMo 1991 and 256.626, RSMo 1985, amended 1991.