74:02:04:39Vertical closed-loop
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
installation. Following installation of piping for the vertical closed loop, the hole shall be filled with bentonite grout from the bottom to the ground surface.
Source: 12 SDR 50, effective September 29, 1985; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 18 SDR 224, effective July 16, 1992.