[Title 40 CFR 60.141a]
[Code of Federal Regulations (annual edition) - July 1, 2009 Edition]
[Title 40 - PROTECTION OF ENVIRONMENT]
[Chapter I - ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)]
[Subchapter C - AIR PROGRAMS (CONTINUED)]
[Part 60 - STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES--]
[Subpart Na - Standards of Performance for Secondary Emissions from Basic]
[Sec. 60.141a - Definitions.]
[From the U.S. Government Printing Office]


40PROTECTION OF ENVIRONMENT62009-07-012009-07-01false60.141aSec. 60.141aPROTECTION OF ENVIRONMENTENVIRONMENTAL PROTECTION AGENCY (CONTINUED)AIR PROGRAMS (CONTINUED)STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES--Standards of Performance for Secondary Emissions from Basic
Sec. 60.141a  Definitions.

    All terms in this subpart not defined below are given the same 
meaning as in the Clean Air Act as amended or in subpart A of this part.
    Basic oxygen process furnace (BOPF) means any furnace with a 
refractory lining in which molten steel is produced by charging scrap 
metal, molten iron, and flux materials or alloy additions into a vessel 
and by introducing a

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high volume of oxygen-rich gas. Open hearth, blast, and reverberatory 
furnaces are not included in this definition.
    Bottom-blown furnace means any BOPF in which oxygen and other 
combustion gases are introduced to the bath of molten iron through 
tuyeres in the bottom of the vessel or through tuyeres in the bottom and 
sides of the vessel.
    Fume suppression system means the equipment comprising any system 
used to inhibit the generation of emissions from steelmaking facilities 
with an inert gas, flame, or steam blanket applied to the surface of 
molten iron or steel.
    Hot metal transfer station means the facility where molten iron is 
emptied from the railroad torpedo car or hot metal car to the shop 
ladle. This includes the transfer of molten iron from the torpedo car or 
hot metal car to a mixer (or other intermediate vessel) and from a mixer 
(or other intermediate vessel) to the ladle. This facility is also known 
as the reladling station or ladle transfer station.
    Primary emission control system means the combination of equipment 
used for the capture and collection of primary emissions (e.g., an open 
hood capture system used in conjunction with a particulate matter 
cleaning device such as an electrostatic precipitator or a closed hood 
capture system used in conjunction with a particulate matter cleaning 
device such as a scrubber).
    Primary emissions means particulate matter emissions from the BOPF 
generated during the steel production cycle which are captured by, and 
do not thereafter escape from, the BOPF primary control system.
    Primary oxygen blow means the period in the steel production cycle 
of a BOPF during which a high volume of oxygen-rich gas is introduced to 
the bath of molten iron by means of a lance inserted from the top of the 
vessel. This definition does not include any additional, or secondary, 
oxygen blows made after the primary blow.
    Secondary emission control system means the combination of equipment 
used for the capture and collection of secondary emissions (e.g.,
    (1) An open hood system for the capture and collection of primary 
and secondary emissions from the BOPF, with local hooding ducted to a 
secondary emission collection device such as a baghouse for the capture 
and collection of emissions from the hot metal transfer and skimming 
station; or
    (2) An open hood system for the capture and collection of primary 
and secondary emissions from the furnace, plus a furnace enclosure with 
local hooding ducted to a secondary emission collection device, such as 
a baghouse, for additional capture and collection of secondary emissions 
from the furnace, with local hooding ducted to a secondary emission 
collection device, such as a baghouse, for the capture and collection of 
emissions from hot metal transfer and skimming station; or
    (3) A furnace enclosure with local hooding ducted to a secondary 
emission collection device such as a baghouse for the capture and 
collection of secondary emissions from a BOPF controlled by a closed 
hood primary emission control system, with local hooding ducted to a 
secondary emission collection device, such as a baghouse, for the 
capture and collection of emissions from hot metal transfer and skimming 
stations).
    Secondary emissions means particulate matter emissions that are not 
captured by the BOPF primary control system, including emissions from 
hot metal transfer and skimming stations. This definition also includes 
particulate matter emissions that escape from openings in the primary 
emission control system, such as from lance hole openings, gaps or tears 
in the ductwork of the primary emission control system, or leaks in 
hoods.
    Skimming station means the facility where slag is mechanically raked 
from the top of the bath of molten iron.
    Steel production cycle means the operations conducted within the 
BOPF steelmaking facility that are required to produce each batch of 
steel, including the following operations: scrap charging, preheating 
(when used), hot metal charging, primary oxygen blowing, sampling 
(vessel turndown and turnup), additional oxygen blowing (when used), 
tapping, and deslagging.

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Hot metal transfer and skimming operations for the next steel production 
cycle are also included when the hot metal transfer station or skimming 
station is an affected facility.
    Top-blown furnace means any BOPF in which oxygen is introduced to 
the bath of molten iron by means of an oxygen lance inserted from the 
top of the vessel.