| (41) Pyrolysis reactor--A unit that produces hydrocarbon
products from the endothermic cracking of feedstocks such as ethane,
propane, butane, and naphtha using combustion to provide indirect
heating for the cracking process.
(42) Reheat furnace--A furnace that is used in the
manufacturing, casting, or forging of metal to raise the temperature
of that metal in the course of processing to a temperature suitable
for hot working or shaping.
(43) Rich-burn engine--A spark-ignited, Otto cycle,
four-stroke, naturally aspirated or turbocharged engine that is capable
of being operated with an exhaust stream oxygen concentration equal
to or less than 0.5% by volume, as originally designed by the manufacturer.
(44) Small utility system--All boilers, auxiliary steam
boilers, and stationary gas turbines that are located in the Dallas-Fort
Worth eight-hour ozone nonattainment area, and were part of one electric
power generating system on January 1, 2000, that had a combined electric
generating capacity less than 500 megawatts.
(45) Stationary gas turbine--Any gas turbine system
that is gas and/or liquid fuel fired with or without power augmentation.
This unit is either attached to a foundation or is portable equipment
operated at a specific minor or major source for more than 90 days
in any 12-month period. Two or more gas turbines powering one shaft
must be treated as one unit.
(46) Stationary internal combustion engine--A reciprocating
engine that remains or will remain at a location (a single site at
a building, structure, facility, or installation) for more than 12
consecutive months. Included in this definition is any engine that,
by itself or in or on a piece of equipment, is portable, meaning designed
to be and capable of being carried or moved from one location to another.
Indicia of portability include, but are not limited to, wheels, skids,
carrying handles, dolly, trailer, or platform. Any engine (or engines)
that replaces an engine at a location and that is intended to perform
the same or similar function as the engine being replaced is included
in calculating the consecutive residence time period. An engine is
considered stationary if it is removed from one location for a period
and then returned to the same location in an attempt to circumvent
the consecutive residence time requirement. Nonroad engines, as defined
in 40 Code of Federal Regulations §89.2, are not considered stationary
for the purposes of this chapter.
(47) System-wide emission rate--The ratio of the total
actual nitrogen oxides mass emissions rate discharged into the atmosphere
from affected units in an electric power generating system or portion
thereof located within a single ozone nonattainment area when firing
at their maximum rated capacity to the total maximum rated capacities
for those units. For fuel oil firing, average activity levels must
be used in lieu of maximum rated capacities for the purpose of calculating
the system-wide emission rate.
(48) System-wide emission specification--The ratio
of the total allowable nitrogen oxides mass emissions rate dischargeable
into the atmosphere from affected units in an electric power generating
system or portion thereof located within a single ozone nonattainment
area when firing at their maximum rated capacity to the total maximum
rated capacities for those units. For fuel oil firing, average activity
levels must be used in lieu of maximum rated capacities for the purpose
of calculating the system-wide emission specification.
(49) Thirty-day rolling average--An average, calculated
for each day that fuel is combusted in a unit, of all the hourly emissions
data for the preceding 30 days that fuel was combusted in the unit.
(50) Twenty-four hour rolling average--An average,
calculated for each hour that fuel is combusted (or acid is produced,
for a nitric or adipic acid production unit), of all the hourly emissions
data for the preceding 24 hours that fuel was combusted in the unit.
(51) Unit--A unit consists of either:
(A) for the purposes of §§117.105, 117.305,
117.405, 117.1005, and 117.1205 of this title (relating to Emission
Specifications for Reasonably Available Control Technology (RACT))
and each requirement of this chapter associated with §§117.105,
117.305, 117.405, 117.1005, and 117.1205 of this title, any boiler,
process heater, stationary gas turbine, or stationary internal combustion
engine, as defined in this section;
(B) for the purposes of §§117.110, 117.310,
117.1010, and 117.1210 of this title (relating to Emission Specifications
for Attainment Demonstration) and each requirement of this chapter
associated with §§117.110, 117.310, 117.1010, and 117.1210
of this title, any boiler, process heater, stationary gas turbine,
or stationary internal combustion engine, as defined in this section,
or any other stationary source of nitrogen oxides (NOX ) at a major source, as defined in this section;
(C) for the purposes of §117.2010 of this title
(relating to Emission Specifications) and each requirement of this
chapter associated with §117.2010 of this title, any boiler,
process heater, stationary gas turbine (including any duct burner
in the turbine exhaust duct), or stationary internal combustion engine,
as defined in this section;
(D) for the purposes of §117.2110 of this title
(relating to Emission Specifications for Eight-Hour Attainment Demonstration)
and each requirement of this chapter associated with §117.2110
of this title, any stationary internal combustion engine, as defined
in this section;
(E) for the purposes of §117.3310 of this title
(relating to Emission Specifications for Eight-Hour Attainment Demonstration)
and each requirement of this chapter associated with §117.3310
of this title, any stationary internal combustion engine, as defined
in this section; or
(F) for the purposes of §117.410 and §117.1310
of this title (relating to Emission Specifications for Eight-Hour
Attainment Demonstration) and each requirement of this chapter associated
with §117.410 and §117.1310 of this title, any boiler, process
heater, stationary gas turbine, or stationary internal combustion
engine, as defined in this section, or any other stationary source
of NOX at a major source, as defined
in this section.
(52) Utility boiler--Any combustion equipment owned
or operated by an electric cooperative, municipality, river authority,
public utility, or Public Utility Commission of Texas regulated utility,
fired with solid, liquid, and/or gaseous fuel, used to produce steam
for the purpose of generating electricity. Stationary gas turbines,
including any associated duct burners and unfired waste heat boilers,
are not considered to be utility boilers.
(53) Wood--Wood, wood residue, bark, or any derivative
fuel or residue thereof in any form, including, but not limited to,
sawdust, sander dust, wood chips, scraps, slabs, millings, shavings,
and processed pellets made from wood or other forest residues.
|
