[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: 40CFR461.20] [Page 522] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 461_BATTERY MANUFACTURING POINT SOURCE CATEGORY --Table of Contents Subpart B_Calcium Subcategory Sec. 461.20 Applicability; description of the calcium subcategory. This subpart applies to discharges to waters of the United States and introductions of pollutants into publicly owned treatment works from manufacturing calcium anode batteries.