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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 785. Oklahoma Water Resources Board |
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Chapter 46. Implementation of Oklahoma's Water Quality Standards |
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Subchapter 3. Implementation of Narrative Toxics Criteria to Protect Aquatic Life Using Whole Effluent Toxicity (WET) Testing |
SECTION 785:46-3-1. Applicability and scope
Latest version.
- (a) The rules in this Subchapter provide a portion of the framework for implementing narrative criteria in OAC 785:45 which prohibit toxicity to aquatic life in waters of the state. This framework is based upon a testing method known as whole effluent toxicity (WET) testing. WET testing is to be used to address point source activities which have the potential for persistent effluent toxicity. The rules in this Subchapter prescribe the method for determining regulatory flow, dilutions required for WET tests, and the method for determining whether there is a reasonable potential to exceed the narrative criteria for the Fish and Wildlife Propagation beneficial use.(b) If it is determined that toxicity is related to a particular chemical constituent, a numerical permit limit may be imposed for that toxicant.(c) Toxicity from halogens (e.g. chlorine, bromine and bromo-chloro compounds) will be controlled by dehalogenation rather than WET testing. However, use of dehalogenation shall not exempt an effluent from the WET testing requirements of this Subchapter.