[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR466.40] [Page 615] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 466--PORCELAIN ENAMELING POINT SOURCE CATEGORY--Table of Contents Subpart D--Copper Basis Material Subcategory Sec. 466.40 Applicability; description of the copper basis material subcategory. This subpart applies to discharges to waters of the United States and introductions of pollutants into publicly owned treatment works from porcelain enameling of copper basis materials.