[Code of Federal Regulations]
[Title 40, Volume 8]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR61.171]

[Page 134]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 61_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS
--Table of Contents
 
  Subpart O_National Emission Standard for Inorganic Arsenic Emissions 
                      From Primary Copper Smelters
 
Sec. 61.171  Definitions.

    All terms used in this subpart shall have the meanings given to them 
in the Act, in subpart A of part 61, and in this section as follows:
    Blowing means the injection of air or oxygen-enriched air into a 
molten converter bath.
    Charging means the addition of a molten or solid material to a 
copper converter.
    Control device means the air pollution control equipment used to 
collect particulate matter emissions.
    Converter arsenic charging rate means the hourly rate at which 
arsenic is charged to the copper converters in the copper converter 
department based on the arsenic content of the copper matte and of any 
lead matte that is charged to the copper converters.
    Copper converter means any vessel in which copper matte is charged 
and is oxidized to copper.
    Copper converter department means all copper converters at a primary 
copper smelter.
    Copper matte means any molten solution of copper and iron sulfides 
produced by smelting copper sulfide ore concentrates or calcines.
    Holding of a copper converter means suspending blowing operations 
while maintaining in a heated state the molten bath in the copper 
converter.
    Inorganic arsenic means the oxides and other noncarbon compounds of 
the element arsenic included in particulate matter, vapors, and 
aerosols.
    Lead matte means any molten solution of copper and other metal 
sulfides produced by reduction of sinter product from the oxidation of 
lead sulfide ore concentrates.
    Malfunction means any sudden failure of air pollution control 
equipment or process equipment or of a process to operate in a normal or 
usual manner so that emissions of inorganic arsenic are increased.
    Opacity means the degree to which emissions reduce the transmission 
of light.
    Particulate matter means any finely divided solid or liquid 
material, other than uncombined water, as measured by the specified 
reference method.
    Pouring means the removal of blister copper from the copper 
converter bath.
    Primary copper smelter means any installation or intermediate 
process engaged in the production of copper from copper-bearing 
materials through the use of pyrometallurgical techniques.
    Primary emission control system means the hoods, ducts, and control 
devices used to capture, convey, and collect process emissions.
    Process emissions means inorganic arsenic emissions from copper 
converters that are captured directly at the source of generation.
    Secondary emissions means inorganic arsenic emissions that escape 
capture by a primary emission control system.
    Secondary hood system means the equipment (including hoods, ducts, 
fans, and dampers) used to capture and transport secondary inorganic 
arsenic emissions.
    Shutdown means the cessation of operation of a stationary source for 
any reason.
    Skimming means the removal of slag from the molten converter bath.

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