40 CFR § 437.13
Effluent limitations attainable by the application of the best available technology economically achievable (BAT)
June 9, 2020
(a) Except as provided in 40 CFR 125.30 through 125.32 or §437.10(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BAT: Limitations for antimony, arsenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in §437.11(a).
(b) In-plant standards for cyanide are the same as the limitations specified in §437.11(b).
[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]