[Code of Federal Regulations] [Title 40, Volume 26] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR421.4] [Page 461] TITLE 40-PROTECTION OF ENVIRONMENT CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 421-NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Sec. 421.4 Compliance date for pretreatment standards for existing sources (PSES). The PSES compliance deadline in subparts A through M is March 8, 1987. The PSES compliance deadline for plants in subparts N through AE is September 20, 1988. [50 FR 52776, Dec. 26, 1985]