Construction Standards for Test Holes

PURPOSE: This rule describes the minimum standards for a properly constructed test hole. (1) Casing when used shall follow the minimum standards pursuant to 10 CSR 233.030(1)(A). (2) Casing Depth. If permanent surface casing is set, it must be set at least thirty feet (30') into bedrock. (3) Temporary Cap. All holes must be capped during the period they remain unplugged pursuant to 10 CSR 23-3.030(1)(E). (4) Grout when used to seal casing annulus shall follow materials and methods pursuant to 10 CSR 23-3.030(1)(C). AUTHORITY: sections 256.606 and 256.626, RSMo 2016.* Original rule filed Aug. 17, 1993, effective March 10, 1994. Amended: Filed Nov. 1, 1995, effective June 30, 1996. Amended: Filed June 27, 2018, effective Feb. 28, 2019. *Original authority: 256.606, RSMo 1991 and 256.626, RSMo 1985, amended 1991.