S.D. Codified Laws § 34A-1-19
If the board finds that there are methods, machines, devices, or construction features which are reasonably feasible that will prevent or significantly reduce the emission of air resulting in pollution and that the public interest will be served by preventing or reducing the emission, it may require the use of such methods and the installation of such features, machines, or devices. However, the owner or operator of an air contaminant source may use any methods, construction features, machines, or devices which are as effective as those required by the board. The owner or operator of an air contaminant source may apply to the board for permission to use alternative methods, construction features, machines, or devices upon a showing by the owner or operator that the alternative methods, construction features, machines, or devices are as effective as those required by the board. Any person who violates this section is subject to § 34A-1-39.
SDCL 34A-1-19