Okla. Admin. Code § 252:606-6-19

Current through Vol. 42, No. 8, January 2, 2025

Section 252:606-6-19 - TREs, TIEs and WET limits

(a)TRE and TIE. A TRE is required when persistent toxicity is demonstrated. When intermittent toxicity is demonstrated DEQ may require a TRE/TIE.

(b)WET limits. DEQ shall incorporate a WET limit into a permit for the species affected by whole effluent toxicity upon the completion of a TRE/TIE, unless DEQ determines that chemical-specific effluent limits or toxicity-specific management practices in accordance with OAC 252:606-6-27 are sufficient to comply with the narrative toxicity criterion and protect the designated use. DEQ may also incorporate a WET limit or chemical-specific effluent limits into a permit when reasonable potential is established.

(c)Effective date of WET limit. The effective date of a WET limit or a chemical-specific limit may be deferred up to three years from the date of completion of the TRE/TIE or the effective date of a permit, as applicable. The effective date of toxicity-specific management practices may be deferred up to one year from the date of completion of the TRE/TIE or the effective date of a permit, as applicable.

Okla. Admin. Code § 252:606-6-19

Adopted by Oklahoma Register, Volume 41, Issue 23, August 15, 2024, eff. 9/15/2024