Statutes, codes, and regulations
Oklahoma Administrative Code
Title 252 - DEPARTMENT OF ENVIRONMENTAL QUALITYChapter 740 - IMPLEMENTATION OF OKLAHOMA'S WATER QUALITY STANDARDS
Subchapter 11 - Implementation of Temperature Criteria to Protect Fish and Wildlife Propagation
Section 252:740-11-4 - Reasonable potential

Okla. Admin. Code § 252:740-11-4

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Current through Vol. 42, No. 8, January 2, 2025
Section 252:740-11-4 - Reasonable potential

A permit limit for temperature is required if there is a reasonable potential that the temperature increase at the edge of the mixing zone is greater than 2.8 °C. EPA Region 6 uses a reasonable potential factor to determine if there is a reasonable potential that concentration of a given substance will exceed the criterion. An analogous reasonable potential factor, Tf, will be used to determine if there is a reasonable potential that temperature will exceed the criterion by 2.8 °C at the edge of the mixing zone. Tf is determined such that only approximately 5% of the observed temperatures are higher. Therefore, Tf is the upper 95th percentile of the effluent temperature distribution.

Okla. Admin. Code § 252:740-11-4

Adopted by Oklahoma Register, Volume 40, Issue 6, December 1, 2022, eff. 10/25/2022
Adopted by Oklahoma Register, Volume 40, Issue 24, September 1, 2023, eff. 9/15/2023