Any person subject to regulation by the Department of Environmental Quality disposing of liquid waste other than hazardous waste in an underground injection well that is required to be permitted shall pay a fee of two-hundredths of one cent (2/100 of $0.01) per gallon for such disposal, provided that the total fee shall be not less than Ten Thousand Dollars ($10,000.00) nor more than Fifty Thousand Dollars ($50,000.00) per year. The total fee for injection of drinking water treatment residuals into a Class V underground injection well shall be not less than Two Thousand Dollars ($2,000.00) nor more than Five Thousand Dollars ($5,000.00) per year. The fee shall be paid to the Department on a quarterly basis within one (1) month following the close of each quarter for the waste disposed in that preceding quarter. The fees shall be deposited into the Department of Environmental Quality Revolving Fund.
Okla. Stat. tit. 27A, § 2-7-120