Okla. Admin. Code § 252:606-6-55 - Wasteload allocations for the implementation of numerical criteria for toxic substances to protect the Fish and Wildlife Propagation beneficial use
If a pollutant exhibits reasonable potential to exceed WQS, a water quality-based permit limit is required for that pollutant. Background levels used in calculating WLAA and WLAC are described in OAC 252:606-6-11 through 14. If a pollutant's background level alone exceeds a criterion, the WLA is set equal to that criterion.
(1)
Streams. The following applies to streams:
(A)
WLAA. Where Qe is expressed in cfs, Equation L-1 is used to determine WLAA. Where Qe is expressed in MGD, Equation L-2 is used.
(B)
WLAC. Depending on the value of Q*, Equation L-3, L-4, or L-5 is used to determine WLAC.
(2)
Lakes. Depending on whether the discharge conveyance is a pipe or canal, Equation L-6 or L-7 is used to determine WLAC, or WLAA, if an acute criterion applies, in the absence of a chronic criterion.
Notes
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