Okla. Admin. Code § 690 app HDownload PDFCurrent through Vol. 41, No. 19, June 17, 2024Appendix H - [Effective until 9/14/2023] Equations for Implementation of Numerical Criteria to Protect the Agriculture Beneficial UseClick to view imageClick to view imageClick to view imageOkla. Admin. Code 690 app HAdopted by Oklahoma Register, Volume 40, Issue 6, December 1, 2022, eff. 10/25/2022 (emergency)