[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR437.15] [Page 370] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 437--THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY--Table of Contents Subpart A--Metals Treatment and Recovery Sec. 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, selenium, silver, tin, titanium, vanadium, and zinc are the same as the corresponding limitation specified in Sec. 437.11(a). (b) In-plant standards for cyanide are the same as the limitations specified in Sec. 437.11(b).