40 CFR § 437.33
Effluent limitations attainable by the application of the best available technology economically achievable (BAT)
June 9, 2020
Except as provided in 40 CFR 125.30 through 125.32 or §437.30(b), any existing point source subject to this subpart must achieve limitations representing the application of BAT: Limitations for copper, zinc, acetone, acetophenone, 2-butanone, o-cresol, p-cresol, phenol, pyridine, and 2,4,6-trichlorophenol are the same as the corresponding limitation specified in §437.31.
[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]