[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR426.50] [Page 33] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 426--GLASS MANUFACTURING POINT SOURCE CATEGORY--Table of Contents Subpart E--Float Glass Manufacturing Subcategory Sec. 426.50 Applicability; description of the float glass manufacturing subcategory. Source: 39 FR 5714, Feb. 14, 1974, unless otherwise noted. The provisions of this subpart are applicable to discharges of pollutants resulting from the process in which several mineral ingredients (sand, soda ash, limestone, dolomite, cullet, and other ingredients) are mixed, melted in a furnace, and floated on a molten tin bath to produce float glass.