Okla. Admin. Code § tit. 252, ch. 100, app ODownload PDFCurrent through Vol. 42, No. 8, January 2, 2025Appendix O - Toxic Air Contaminants (TAC) Maximum Acceptable Ambient Concentrations (MAAC)Figure 1 Okla. Admin. Code tit. 252, ch. 100, app OAdded at 23 Ok Reg 17, eff 8-11-05 (emergency); Added at 23 Ok Reg 923, eff 6-15-06