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Oklahoma Administrative Code (Last Updated: March 11, 2021) |
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TITLE 252. Department of Environmental Quality |
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Chapter 690. Water Quality Standards Implementation |
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Subchapter 3. Point Source Discharges |
SECTION 252:690-3-68. Wasteload allocations for the implementation of human health criteria for toxic substances to protect the Fish Consumption beneficial use
Latest version.
- If Cd(FF) exceeds CFF a water quality-based permit limit is required for that substance. Background levels used in calculating WLAFF are described in OAC 252:690-3-10 through 3-13 and 3-15. If a pollutant's background level exceeds CFF, WLAFF is set equal to CFF. Equation G-1 is used to calculate WLAFF. For discharges to a stream located less than five stream miles upstream of a public water supply intake and for discharges to a lake located within one mile of a public water supply intake, WLAFF is set equal to CFF for any pollutant detected in the discharge. Where Cd(NRWQC) exceeds CNRWQC, and there is no applicable state criterion for the substance, effluent monitoring sufficient to provide at least 10 data points over a three month to one year period is required in the permit rather than effluent limitations.