74:02:04:53.  Cement grout requirements. Water used in making cement grout must be clean and may not contain oil or other organic material. The cement grouting of the well casing must be completed in one continuous operation. Bentonite may be added to cement grout in quantities not exceeding 2 pounds of bentonite for each 94-pound sack of cement. Up to 7 gallons of water may be mixed for each 94-pound sack of cement when 2 pounds of bentonite are added. Calcium chloride may be added to the cement grout except when the mixture will be used to grout thermoplastic casing.

          Source: SL 1975, ch 16, § 1; transferred from § 52:01:02:07, effective July 1, 1979; transferred from § 74:02:02:07, 12 SDR 50, effective September 29, 1985; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 18 SDR 224, effective July 16, 1992.

          General Authority: SDCL 46-2-5, 46-6-20, 46-6-27.

          Law Implemented: SDCL 46-6-6.1, 46-6-10, 46-6-20, 46-6-27.

          74:02:04:53.01.  Bentonite grout requirements. Bentonite material manufactured for use as a drilling fluid does not meet the requirements for bentonite grout. For approval by the chief engineer, bentonite grout must contain a minimum of 20 percent solids by weight and have a minimum slurry density of 9.4 pounds per gallon and must be mixed according to the manufacturer's recommendations.

          Source: 18 SDR 224, effective July 16, 1992.

          General Authority: SDCL 46-2-5, 46-6-20, 46-6-27.

          Law Implemented: SDCL 46-6-6.1, 46-6-10, 46-6-20, 46-6-27.