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§ 437.15 Pretreatment standards for existing sources (PSES).
(a) Except as provided in 40 CFR 403.7, 403.13 or § 437.10(b), and no later than December 22, 2003, any existing 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).