S.D. Admin. R. 74:11:08:06
Test holes that penetrate water-bearing unconsolidated granular material above bedrock and that continue into the bedrock shall be plugged by placing a column of bentonite or cement grout from the bottom of the hole to a point not less than five feet below the bedrock surface. A column of cement grout shall be placed between the bentonite grout and three feet below the ground surface. Upon initial settling of the cement grout, the remainder of the test hole shall be plugged with topsoil or a suitable material in a manner consistent with the specifications set forth in § 74:11:08:04.
Test holes that penetrate nonwater-bearing unconsolidated granular material above the bedrock surface shall be plugged by returning all excess drill cuttings to the hole to a point not less than eight feet below the ground surface. The upper eight feet of the hole shall be plugged in accordance with the specifications set forth in § 74:11:08:04. If drill cuttings are not available in quantities sufficient to fill the hole to within eight feet of the ground surface, that portion of the hole remaining to be filled may be plugged with either cement grout or free-flowing mineral aggregate.
S.D. Admin. R. 74:11:08:06
General Authority: SDCL 45-6C-29, 45-6D-34.
Law Implemented: SDCL 45-6C-29, 45-6D-34.