[Code of Federal Regulations]
[Title 40, Volume 5]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR57.401]

[Page 143]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 57--PRIMARY NONFERROUS SMELTER ORDERS--Table of Contents
 
          Subpart D--Supplementary Control System Requirements
 
Sec. 57.401  General requirements.


    Except as provided in subpart E, each NSO shall require the smelter 
owner to prevent all violations of the NAAQS in the smelter's designated 
liability area (DLA) through the operation of an approved supplementary 
control system (SCS).