[Code of Federal Regulations]
[Title 40, Volume 11]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR63.1381]

[Page 505-506]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 63_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR 
 
Subpart NNN_National Emission Standards for Hazardous Air Pollutants for 
                      Wool Fiberglass Manufacturing
 
Sec.  63.1381  Definitions.

    Terms used in this subpart are defined in the Clean Air Act, in 
Sec.  63.2, or in this section as follows:
    Bag leak detection system means systems that include, but are not 
limited to, devices using triboelectric, light scattering, and other 
effects to monitor relative or absolute particulate matter (PM) 
emissions.
    Bonded means wool fiberglass to which a phenol-formaldehyde binder 
has been applied.
    Building insulation means bonded wool fiberglass insulation, having 
a loss on ignition of less than 8 percent and a density of less than 32 
kilograms per cubic meter (kg/m\3\) (2 pounds per cubic foot [lb/
ft\3\]).
    Cold top electric furnace means an all-electric glass-melting 
furnace that operates with a temperature of 120 [deg]C (250 [deg]F) or 
less as measured at a location 46 to 61 centimeters (18 to 24 inches) 
above the molten glass surface.
    Flame attenuation means a process used to produce wool fiberglass 
where molten glass flows by gravity from melting furnaces, or pots, to 
form filaments that are drawn down and attenuated by passing in front of 
a high-velocity gas burner flame.
    Glass-melting furnace means a unit comprising a refractory vessel in 
which raw materials are charged, melted at high temperature, refined, 
and conditioned to produce molten glass. The unit includes foundations, 
superstructure and retaining walls, raw material charger systems, heat 
exchangers, melter cooling system, exhaust system, refractory brick 
work, fuel supply and electrical boosting equipment, integral control 
systems and instrumentation, and appendages for conditioning and 
distributing molten glass to forming processes. The forming apparatus, 
including flow channels, is not considered part of the glass-melting 
furnace.
    Glass pull rate means the mass of molten glass that is produced by a 
single glass-melting furnace or that is used in the manufacture of wool 
fiberglass at a single manufacturing line in a specified time period.
    Hazardous Air Pollutant (HAP) means any air pollutant listed in or 
pursuant to section 112(b) of the Clean Air Act.
    Heavy-density product means bonded wool fiberglass insulation 
manufactured on a flame attenuation manufacturing line and having a loss 
on ignition of 11 to 25 percent and a density of 8 to 48 kg/m\3\ (0.5 to 
3 lb/ft \3\).
    Incinerator means an enclosed air pollution control device that uses 
controlled flame combustion to convert combustible materials to 
noncombustible gases.
    Loss on ignition (LOI) means the percent decrease in weight of wool 
fiberglass after it has been ignited. The LOI is used to monitor the 
weight percent of binder in wool fiberglass.
    Manufacturing line means the manufacturing equipment for the 
production of wool fiberglass that consists of a forming section where 
molten glass is fiberized and a fiberglass mat is formed and which may 
include a curing section where binder resin in the mat is thermally set 
and a cooling section where the mat is cooled.
    New source means any affected source the construction or 
reconstruction of which is commenced after March 31, 1997.
    Pipe product means bonded wool fiberglass insulation manufactured on 
a flame attenuation manufacturing line and having a loss on ignition of 
8 to 14 percent and a density of 48 to 96 kg/m \3\ (3 to 6 lb/ft\3\).
    Rotary spin means a process used to produce wool fiberglass building 
insulation by forcing molten glass through numerous small orifices in 
the side wall of a spinner to form continuous glass fibers that are then 
broken into discrete lengths by high-velocity air flow. Any process used 
to produce bonded wool fiberglass building insulation by a process other 
than flame attenuation is considered rotary spin.
    Wool fiberglass means insulation materials composed of glass fibers 
made

[[Page 506]]

from glass produced or melted at the same facility where the 
manufacturing line is located.
    Wool fiberglass manufacturing facility means any facility 
manufacturing wool fiberglass on a rotary spin manufacturing line or on 
a flame attenuation manufacturing line.