[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR429.135] [Page 99] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 429--TIMBER PRODUCTS PROCESSING POINT SOURCE CATEGORY--Table of Contents Subpart L--Finishing Subcategory Sec. 429.135 Pretreatment standards for existing sources (PSES). Any existing source subject to this subpart which introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.