[Code of Federal Regulations] [Title 40, Volume 26] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR413.21] [Page 210] TITLE 40-PROTECTION OF ENVIRONMENT CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 413-ELECTROPLATING POINT SOURCE CATEGORY--Table of Contents Subpart B-Electroplating of Precious Metals Subcategory Sec. 413.21 Specialized definitions. For the purpose of this subpart: (a) The term sq m (``sq ft'') shall mean the area plated expressed in square meters (square feet). (b) The term operation shall mean any step in the electroplating process in which a metal is electrodeposited on a basis material and which is followed by a rinse: This includes the related operations of alkaline cleaning, acid pickle, stripping, and coloring when each operation is followed by a rinse.