[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: 40CFR430.50] [Page 149] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 430_THE PULP, PAPER, AND PAPERBOARD POINT SOURCE CATEGORY --Table of Contents Subpart E_Papergrade Sulfite Subcategory Sec. 430.50 Applicability; description of the papergrade sulfite subcategory. The provisions of this subpart apply to discharges resulting from the: Integrated production of pulp and paper at papergrade sulfite mills, where blow pit pulp washing techniques are used; and the integrated production of pulp and paper at papergrade sulfite mills where vacuum or pressure drums are used to wash pulp.