All methods of sample collection, preservation, and analysis used in applying any of the standards shall be in accordance with Part 136 (40 CFR Part 136) or other procedures approved by DEQ.

Added at 40 Ok Reg 327, eff 10-25-22 (emergency)

Added at 40 Ok Reg 2060, eff 9-15-23

Amended at 41 Ok Reg, Number 23, effective 9-15-24