[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR464.20] [Page 564-565] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 464--METAL MOLDING AND CASTING POINT SOURCE CATEGORY--Table of Contents Subpart B--Copper Casting Subcategory Sec. 464.20 Applicability; description of the copper casting subcategory. The provisions of this subpart are applicable to discharges to waters of the United States and to the introduction [[Page 565]] of pollutants into publicly owned treatment works resulting from copper casting operations as defined in Sec. 464.02(b).