[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: 40CFR421.20]

[Page 463]
 
                TITLE 40-PROTECTION OF ENVIRONMENT
 
      CHAPTER I-ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 421-NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY--Table of Contents
 
         Subpart B-Primary Aluminum Smelting Subcategory
 
Sec. 421.20  Applicability: description of the primary aluminum smelting subcategory.


    The provisions of this subpart are applicable to discharges 
resulting from the production of aluminum from alumina in the Hall-
Heroult process.