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 Oklahoma Administrative Code (Last Updated: March 11, 2021)
 TITLE 785. Oklahoma Water Resources Board
 Chapter 46. Implementation of Oklahoma's Water Quality Standards
 Subchapter 11. Implementation of Temperature Criteria to Protect Fish and Wildlife Propagation

  SECTION 785:46-11-6. Reasonable potential equations  

Latest version.
  • (a)   The maximum temperature difference on the mixing zone boundary must be computed using the following equation to determine if there is a reasonable potential to exceed 2.8°C outside the mixing zone:
    EQUATION
    The dilution factor, df, must be that which yields the maximum temperature difference on the mixing zone boundary.
    (b)   Substituting for df, the following equations shall be used for discharges to streams:
    T' = (1.94Q* (Tf - Ta)) / (1 + Q*)
    when Q* is less than or equal to 0.1823, or
    EQUATION
    when Q* is greater than 0.1823 and less than 0.3333, or
    EQUATION
    when Q* is greater than or equal to 0.3333. Q* = Qe/Qu (the dilution capacity).
    (c)   The following equations shall be used for discharges to lakes:
    EQUATION
    when D is greater than or equal to 3 feet. D is pipe diameter, and
    EQUATION
    when W is greater than or equal to 3 feet. W is canal width.
    (d)   There is a reasonable potential that the effluent may cause a criterion exceedance at the maximum concentration on the mixing zone boundary if T' > 2.8°C.
[Source: Added at 13 Ok Reg 2891, eff 7-1-96; Amended at 16 Ok Reg 3253, eff 7-12-99; Amended at 19 Ok Reg 2512, eff 6-27-02]