[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: 40CFR425.40] [Page 13] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 425_LEATHER TANNING AND FINISHING POINT SOURCE CATEGORY --Table of Contents Subpart D_Retan-Wet Finish-Sides Subcategory Sec. 425.40 Applicability; description of the retan-wet finish-sides subcategory. The provisions of this subpart are applicable to process wastewater discharges resulting from any tannery which processes previously tanned hides and skins (grain side only) into finished leather by retan-wet finishing.