[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR429.65] [Page 92] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 429_TIMBER PRODUCTS PROCESSING POINT SOURCE CATEGORY --Table of Contents Subpart E_Wet Process Hardboard Subcategory Sec. 429.65 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.