40 CFR § 437.16
Pretreatment standards for new sources (PSNS)
June 9, 2020
(a) Except as provided in 40 CFR 403.7 or §437.10(b), any new source subject to this subpart must achieve the following pretreatment standards: Standards 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]