Mo. Rev. Stat. § 260.355: Exempted wastes.

Exempted from the provisions of sections 260.350 to 260.480 are:

(1) Radioactive wastes regulated under section 2011, et seq., of title 42 of United States Code;

(2) Emissions to the air subject to regulation of and which are regulated by the Missouri air conservation commission pursuant to chapter 643;

(3) Discharges to the waters of this state pursuant to a permit issued by the Missouri clean water commission pursuant to chapter 204;

(4) Fluids injected or returned into subsurface formations in connection with oil or gas operations regulated by the Missouri oil and gas council pursuant to chapter 259;

(5) Mining wastes used in reclamation of mined lands pursuant to a permit issued by the Missouri mining commission pursuant to chapter 444.