44:90:07:07Potentially hazardous extraction methods.
Section · Administrative Rules of South Dakota · View on sdlegislature.gov ↗
The department shall permit extraction using the following substances, if 99 percent or greater in purity and if the department deems storage, preparation, electrical, gas monitoring, fire suppression, and exhaust systems methods to be adequate: (1) Carbon dioxide; (2) Another liquid chemical, compressed gas, or commercial product that has a flashpoint above 100 degrees Fahrenheit; or (3) Ethanol or solutions of ethanol and water.
Source: 48 SDR 40, effective October 5, 2021.