Mo. Rev. Stat. § 260.423

If the director orders a facility to accept waste pursuant to subdivision (2) of subsection 1 of section 260.420, the department shall reimburse the operator at the rate which he normally charges for treating, storing or disposing of similar wastes within sixty days of the treatment, storage or disposal of such waste. In the event of a disagreement about the rate, the director or the operator may appeal to the commission within ninety days. The commission may schedule a hearing within thirty days. No later than thirty days after receipt of the complete record, or following a decision not to hold a hearing, the commission shall provide the operator with a written determination. All final decisions of the commission shall be reviewable under chapter 536.