S.D. Admin. R. 74:11:08:05
Current through Register Vol. 51, page 56, November 4, 2024
Test holes that penetrate confined aquifers or that encounter more than one aquifer may be plugged with bentonite grout only if the weight of the bentonite grout column is sufficient to overcome formation pressure. If the weight of the bentonite grout column is not sufficient to overcome formation pressure the test hole must be plugged with cement grout. The bentonite or cement grout must be placed from the bottom of the hole to within eight feet of 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.
S.D. Admin. R. 74:11:08:05
General Authority: SDCL 45-6C-29, 45-6D-34.
Law Implemented: SDCL 45-6C-29, 45-6D-34.