[Code of Federal Regulations]
[Title 40, Volume 15]
[Revised as of July 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR65.2]
[Page 18-28]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 65_CONSOLIDATED FEDERAL AIR RULE--Table of Contents
Subpart A_General Provisions
Sec. 65.2 Definitions.
All terms used in this part shall have the meaning given them in the
Act and in this section. If a term is defined both in this section and
in other parts that reference the use of this part, the term shall have
the meaning given in this section for purposes of this part. If a term
is not defined in the Act or in this section, the term shall have the
meaning given in the referencing subpart for purposes of this part. The
terms follow:
Act means the Clean Air Act (42 U.S.C. 7401 et seq.).
Administrator means the Administrator of the United States
Environmental Protection Agency (EPA) or his or her authorized
representative (for
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example, a State that has been delegated the authority to implement the
provisions of this part).
Approved permit program means a State permit program approved by the
Administrator as meeting the requirements of part 70 of this chapter or
a Federal permit program established in this chapter pursuant to title V
of the Act (42 U.S.C. 7661).
Automated continuous parameter monitoring system means a continuous
parameter monitoring system that automatically both records the measured
data and calculates hourly averages.
Automated monitoring and recording system means any means of
measuring values of monitored parameters and creating a hard copy or
computer record of the measured values that does not require manual
reading of monitoring instruments and manual transcription of data
values. Automated monitoring and recording systems include, but are not
limited to, computerized systems, strip charts, and circular charts.
Batch process means a process in which the equipment is fed
intermittently or discontinuously. Processing then occurs in this
equipment after which the equipment is generally emptied. Examples of
industries that use batch processes include pharmaceutical production
and pesticide production.
Batch product-process equipment train means the collection of
equipment (for example, connectors, reactors, valves, pumps) configured
to produce a specific product or intermediate by a batch process.
Boiler means any enclosed combustion device that extracts useful
energy in the form of steam and is not an incinerator or a process
heater. Boiler also means any industrial furnace as defined in 40 CFR
260.10.
Bottoms receiver means a tank that collects distillation bottoms
before the stream is sent for storage or for further downstream
processing.
By compound means by individual stream components, not carbon
equivalents.
Car-seal means a seal that is placed on a device that is used to
change the position of a valve (for example, from opened to closed) in
such a way that the position of the valve cannot be changed without
breaking the seal.
Closed vent system means a system that is not open to the atmosphere
and is composed of piping, ductwork, connections, and, if necessary,
flow inducing devices that transport gas or vapor from an emission point
to a control device. A closed vent system does not include the vapor
collection system that is part of any tank truck or railcar or the
loading arm or hose that is used for vapor return. For transfer racks,
the closed vent system begins at, and includes, the first block valve on
the downstream side of the loading arm or hose used to convey displaced
vapors.
Closed vent system shutdown means a work practice or operational
procedure that stops production from a process unit or part of a process
unit during which it is technically feasible to clear process material
from a closed vent system or part of a closed vent system consistent
with safety constraints and during which repairs can be effected. An
unscheduled work practice or operational procedure that stops production
from a process unit or part of a process unit for less than 24 hours is
not a closed vent system shutdown. An unscheduled work practice or
operational procedure that would stop production from a process unit or
part of a process unit for a shorter period of time than would be
required to clear the closed vent system or part of the closed vent
system of materials and start up the unit, and would result in greater
emissions than delay of repair of leaking components until the next
scheduled closed vent system shutdown, is not a closed vent system
shutdown. The use of spare equipment and technically feasible bypassing
of equipment without stopping production are not closed vent system
shutdowns.
Closed-loop system means an enclosed system that returns process
fluid to a process.
Closed-purge system means a system or combination of systems and
portable containers to capture purged liquids. Containers must be
covered or closed when not being filled or emptied.
Combustion device means an individual unit of equipment, such as a
flare, incinerator, process heater, or
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boiler, used for the combustion of organic emissions.
Compliance date means the date by which a regulated source is
required to be in compliance with a relevant standard, limitation,
prohibition, or any federally enforceable requirement established by the
Administrator (or a State with an approved permit program) pursuant to
the Act.
Connector means flanged, screwed, or other joined fittings used to
connect two pipelines or a pipeline and a piece of equipment. A common
connector is a flange. Joined fittings welded completely around the
circumference of the interface are not considered connectors for the
purpose of this regulation. For the purpose of reporting and
recordkeeping, connector means joined fittings that are not
inaccessible, ceramic, or ceramic-lined (for example, porcelain, glass,
or glass-lined) as described in Sec. 65.108(e)(2).
Continuous parameter monitoring system or CPMS means the total
equipment that may be required to meet the data acquisition and
availability requirements of this part used to sample, condition (if
applicable), analyze, and provide a record of process or control system
parameters.
Continuous record means documentation, either in hard copy or
computer-readable form, of data values measured at least once every 15
minutes and recorded at the frequency specified in Sec. 65.161(a).
Continuous seal means a seal that is designed to form a continuous
closure that completely covers the space between the wall of the storage
vessel and the edge of the floating roof. A continuous seal may be a
vapor-mounted, liquid-mounted, or metallic shoe seal. A continuous seal
may be constructed of fastened segments so as to form a continuous seal.
Control device means any combustion device, recovery device, or any
combination of these devices used to comply with this part. Such
equipment or devices include, but are not limited to, absorbers, carbon
adsorbers, condensers, incinerators, flares, boilers, and process
heaters. For process vents (as defined in this section), recovery
devices are not considered control devices except for the recovery
devices specified in Sec. 65.63(a)(2)(ii). A fuel gas system is not a
control device. For a steam stripper, a primary condenser is not
considered a control device.
Control system means the combination of the closed vent system and
the control devices used to collect and control vapors or gases from a
regulated source.
Day means a calendar day.
Distance piece means an open or enclosed casing through which the
piston rod travels, separating the compressor cylinder from the
crankcase.
Double block and bleed system means two block valves connected in
series with a bleed valve or line that can vent the line between the two
block valves.
Ductwork means a conveyance system such as those commonly used for
heating and ventilation systems. It is often made of sheet metal and
often has sections connected by screws or crimping. Hard-piping is not
ductwork.
Emission point means an individual process vent, storage vessel,
transfer rack, wastewater stream, or equipment leak.
Empty or emptying means the removal of the stored liquid from a
storage vessel. Storage vessels where stored liquid is left on the
walls, as bottom clingage, or in pools due to bottom irregularities are
considered empty. Lowering of the stored liquid level, so that the
floating roof is resting on its legs, as necessitated by normal vessel
operation (for example, when changing stored material or when
transferring material out of the vessel for shipment) is not considered
emptying.
Equipment means each of the following that is subject to control
under the referencing subpart: pump, compressor, agitator, pressure
relief device, sampling connection system, open-ended valve or line,
valve, connector, and instrumentation system; and any control devices or
systems used to comply with subpart F of this part.
Equivalent method means any method of sampling and analyzing for an
air pollutant that has been demonstrated to the Administrator's
satisfaction to have a consistent and quantitatively known relationship
to the reference method under specified conditions.
External floating roof or EFR means a pontoon-type (noncontact) or
double-
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deck-type (contact) roof that is designed to rest on the stored liquid
surface in a storage vessel with no fixed roof.
Failure, EFR (referred to as EFR failure) is defined as any time the
external floating roof's primary seal has holes, tears, or other
openings in the shoe, seal fabric, or seal envelope; or the secondary
seal has holes, tears, or other openings in the seal or the seal fabric;
or the gaskets no longer close off the stored liquid surface from the
atmosphere; or a slotted membrane has more than 10 percent open area.
Failure, internal floating roof type A (referred to as IFR type A
failure) means any time, as determined during visual inspection through
roof hatches, in which the internal floating roof is not resting on the
surface of the stored liquid inside the storage vessel and is not
resting on the leg supports; or there is stored liquid on the floating
roof; or there are holes, tears, or other openings in the seal or seal
fabric; or there are visible gaps between the seal and the wall of the
storage vessel.
Failure, internal floating roof type B (referred to as IFR type B
failure) means any time, as determined during internal inspections, the
internal floating roof's primary seal has holes, tears, or other
openings in the seal or the seal fabric; or the secondary seal (if one
has been installed) has holes, tears, or other openings in the seal or
the seal fabric; or the gaskets no longer close off the stored liquid
surface from the atmosphere; or a slotted membrane has more than 10
percent open area.
Fill or filling means the introduction of liquids into a storage
vessel, but not necessarily to complete capacity.
First attempt at repair, for the purposes of subparts F and G of
this part, means to take action for the purpose of stopping or reducing
leakage of organic material to the atmosphere, followed by monitoring as
specified in Sec. 65.104(b) and Sec. 65.143(c), as appropriate, to
verify whether the leak is repaired, unless the owner or operator
determines by other means that the leak is not repaired.
Fixed roof means a roof that is mounted (for example, permanently
affixed) on a storage vessel in a stationary manner and that does not
move with fluctuations in stored liquid level.
Flame zone means the portion of the combustion chamber in a boiler
or process heater occupied by the flame envelope.
Floating roof means a roof consisting of an external floating roof
or an internal floating roof that is designed to rest upon and is
supported by the stored liquid and is equipped with a continuous seal.
Flow indicator means a device that indicates whether gas flow is
present in a line, or whether the valve position would allow gas flow to
be present in a line.
Fuel gas means gases that are combusted to derive useful work or
heat.
Fuel gas system means the offsite and onsite piping and flow and
pressure control system that gathers gaseous stream(s) generated by
onsite operations, may blend them with other sources of gas, and
transports the gaseous stream for use as fuel gas in combustion devices
or in-process combustion equipment, such as furnaces and gas turbines,
either singly or in combination.
Group 1 process vent means a process vent for which the flow rate is
greater than or equal to 0.011 standard cubic meter per minute (0.39
cubic feet per minute); the total concentration is greater than or equal
to the appropriate value in table 1 of subpart D of this part, and the
total resource effectiveness index value, calculated according to Sec.
65.64(h) is less than or equal to 1.0.
Group 2A process vent means a process vent that is not Group 1 or
Group 2B for which monitoring and recordkeeping are required to
demonstrate a total resource effectiveness index value greater than 1.0.
Group 2B process vent means a process vent that is not Group 1 or
Group 2A for which monitoring and recordkeeping are not required to
demonstrate a total resource effectiveness index value greater than 4.0,
or which is exempt from control requirements due to the vent stream's
flow rate, regulated material concentration, or total resource
effectiveness index value.
Halogenated vent stream or halogenated stream means, for purposes of
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this part, a vent stream determined to be halogenated by the procedures
specified in Sec. 65.85(c) for transfer racks and in Sec. 65.64(g) for
process vents, as applicable.
Halogens and hydrogen halides means hydrogen chloride (HCl),
chlorine (Cl2), hydrogen bromide (HBr), bromine
(Br2), and hydrogen fluoride (HF).
Hard-piping means pipe or tubing that is manufactured and installed
using good engineering judgment and standards, such as ASME B31.3,
Process Piping (available from the American Society of Mechanical
Engineers, PO Box 2900, Fairfield, NJ 07007-2900).
High-throughput transfer racks means those transfer racks that
transfer greater than or equal to a total of 11.8 million liters per
year (3.12 million gallons per year) of liquid containing regulated
material.
In food/medical service means that a piece of equipment in regulated
material service contacts a process stream used to manufacture a Food
and Drug Administration-regulated product where leakage of a barrier
fluid into the process stream would cause any of the following:
(1) A dilution of product quality so that the product would not meet
written specifications;
(2) An exothermic reaction that is a safety hazard;
(3) The intended reaction to be slowed down or stopped; or
(4) An undesired side reaction to occur.
In gas/vapor service means that a piece of equipment in regulated
material service contains a gas or vapor when in operation.
In heavy liquid service means that a piece of equipment in regulated
material service is not in gas/vapor service or in light liquid service.
In light liquid service means that a piece of equipment in regulated
material service contains a liquid that meets the following conditions:
(1) The vapor pressure of one or more of the organic compounds is
greater than 0.3 kilopascals at 20 [deg]C (0.04 pounds per square inch
at 68 [deg]F);
(2) The total concentration of the pure organic compound
constituents having a vapor pressure greater than 0.3 kilopascals at 20
[deg]C (0.04 pounds per square inch at 68 [deg]F) is equal to or greater
than 20 percent by weight of the total process stream; and
(3) The fluid is a liquid at operating conditions.(Note: Vapor
pressures may be determined by standard reference texts or American
Society for Testing and Materials (ASTM) D-2879, available from American
Society for Testing and Materials, 1916 Race Street, Philadelphia,
Pennsylvania 19103; or University Microfilms International, 300 North
Zeeb Road, Ann Arbor, Michigan 48106.)
In liquid service means that a piece of equipment in regulated
material service is not in gas/vapor service.
In regulated material service means, for the purposes of the
equipment leak provisions of subpart F of this part, equipment which
meets the definition of ``in volatile organic compound service,'' ``in
volatile hazardous air pollutant service,'' ``in benzene service,'' ``in
vinyl chloride service,'' or ``in organic hazardous air pollutant
service'' as defined in the referencing subpart.
In vacuum service means that equipment is operating at an internal
pressure that is at least 5 kilopascals (0.7 pounds per square inch)
below ambient pressure.
In-situ sampling systems means nonextractive samplers or in-line
samplers.
Incinerator means an enclosed combustion device that is used for
destroying organic compounds. Auxiliary fuel may be used to heat waste
gas to combustion temperatures. Any energy recovery section present is
not physically formed into one manufactured or assembled unit with the
combustion section; rather, the energy recovery section is a separate
section following the combustion section and the two are joined by ducts
or connections carrying flue gas. This energy recovery section
limitation does not apply to an energy recovery section used solely to
preheat the incoming vent stream or combustion air.
Initial startup means, for new or reconstructed sources, the first
time the source begins production. For additions or changes not defined
as a new source by an applicable referencing subpart, initial startup
means the first time additional or changed equipment is put into
operation. Initial startup does not
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include operation solely for testing equipment. Initial startup does not
include subsequent startup (as defined in this section) of process units
following malfunctions or process unit shutdowns. Except for equipment
leaks, initial startup also does not include subsequent startups (as
defined in this section) of process units following changes in product
for flexible operation units or following recharging of equipment in
batch operation.
Instrumentation system means a group of equipment components used to
condition and convey a sample of the process fluid to analyzers and
instruments for the purpose of determining process operating conditions
(for example, composition, pressure, flow). Valves and connectors are
the predominant type of equipment used in instrumentation systems;
however, other types of equipment may also be included in these systems.
Only valves nominally 0.5 inches and smaller in diameter and connectors
nominally 0.75 inches and smaller in diameter are considered
instrumentation systems for the purposes of subpart F of this part.
Intermediate change to monitoring means a modification to federally
required monitoring involving ``proven technology'' (generally accepted
by the scientific community as equivalent or better) that is applied on
a site-specific basis and that may have the potential to decrease the
stringency of the associated emission limitation or standard. Though
site-specific, an intermediate change may set a national precedent for a
source category and may ultimately result in a revision to the federally
required monitoring. Examples of intermediate changes to monitoring
include, but are not limited to:
(1) Use of a continuous monitoring system (CEMS) in lieu of a
parameter monitoring approach;
(2) Decreased frequency for non-continuous parameter monitoring or
physical inspections;
(3) Changes to quality control requirements for parameter
monitoring; and
(4) Use of an electronic data reduction system in lieu of manual
data reduction.
Intermediate change to test method means a within-method
modification to a federally enforceable test method involving ``proven
technology'' (generally accepted by the scientific community as
equivalent or better) that is applied on a site-specific basis and that
may have the potential to decrease the stringency of the associated
emission limitation or standard. Though site-specific, an intermediate
change may set a national precedent for a source category and may
ultimately result in a revision to the federally enforceable test
method. In order to be approved, an intermediate change must be
validated according to EPA Method 301 (40 CFR part 63, appendix A) to
demonstrate that it provides equal or improved accuracy or precision.
Examples of intermediate changes to a test method include, but are not
limited to:
(1) Modifications to a test method's sampling procedure including
substitution of sampling equipment that has been demonstrated for a
particular sample matrix; and use of a different impinger absorbing
solution;
(2) Changes in sample recovery procedures and analytical techniques,
such as changes to sample holding times and use of a different
analytical finish with proven capability for the analyte of interest;
and
(3) ``Combining'' a federally required method with another proven
method for application to processes emitting multiple pollutants.
Internal floating roof or IFR means a pontoon-type (noncontact) or
double-deck-type (contact) roof that is designed to rest or float on the
stored liquid surface inside a storage vessel that has a fixed roof.
Liquid-mounted seal means a foam-or liquid-filled continuous seal
mounted in contact with the stored liquid.
Liquids dripping means any visible leakage from a seal including
dripping, spraying, misting, clouding, and ice formation. Indications of
liquids dripping include puddling or new stains that are indicative of
an existing evaporated drip.
Loading cycle means the time period from the beginning of filling a
tank truck or railcar until flow to the control device ceases as
determined by the flow indicator.
Low-throughput transfer racks means those transfer racks that
transfer less
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than a total of 11.8 million liters per year (3.12 million gallons per
year) of liquid containing regulated material.
Major change to monitoring means a modification to federally
required monitoring that uses ``unproven technology or procedures'' (not
generally accepted by the scientific community) or is an entirely new
method (sometimes necessary when the required monitoring is unsuitable).
A major change to monitoring may be site-specific or may apply to one or
more source categories and will almost always set a national precedent.
Examples of major changes to monitoring include, but are not limited to:
(1) Use of a new monitoring approach developed to apply to a control
technology not contemplated in the applicable regulation in this part;
(2) Use of a predictive emission monitoring system (PEMS) in place
of a required continuous emission monitoring system (CEMS);
(3) Use of alternative calibration procedures that do not involve
calibration gases or test cells;
(4) Use of an analytical technology that differs from that specified
by a performance specification;
(5) Decreased monitoring frequency for a continuous emission
monitoring system, continuous opacity monitoring system, predictive
emission monitoring system, or continuous parameter monitoring system;
(6) Decreased monitoring frequency for a leak detection and repair
program; and
(7) Use of alternative averaging times for reporting purposes.
Major change to test method means a modification to a federally
enforceable test method that uses ``unproven technology or procedures''
(not generally accepted by the scientific community) or is an entirely
new method (sometimes necessary when the required test method is
unsuitable). A major change to a test method may be site-specific or may
apply to one or more source categories and will almost always set a
national precedent. In order to be approved, a major change must be
validated according to EPA Method 301 (40 CFR part 63, appendix A).
Examples of major changes to a test method include, but are not limited
to:
(1) Use of an unproven analytical finish;
(2) Use of a method developed to fill a test method gap;
(3) Use of a new test method developed to apply to a control
technology not contemplated in the applicable regulation in this part;
and
(4) Combining two or more sampling/analytical methods (at least one
unproven) into one for application to processes emitting multiple
pollutants.
Malfunction means any sudden, infrequent, and not reasonably
preventable failure of air pollution control equipment, monitoring
equipment, process equipment, or a process to operate in a normal or
usual manner. Failures that are caused in part by poor maintenance or
careless operation are not malfunctions. Malfunctions that do not affect
a regulated source or compliance with this part are not malfunctions for
purposes of this part.
Metallic shoe seal or mechanical shoe seal means metal sheets that
are held vertically against the wall of the storage vessel by springs,
weighted levers, or other mechanisms and connected to the floating roof
by braces or other means. A flexible coated fabric (envelope) spans the
annular space between the metal sheet and the floating roof.
Minor change to monitoring means:
(1) A modification to federally required monitoring that:
(i) Does not decrease the stringency of the compliance and
enforcement measures of the relevant standard;
(ii) Has no national significance (e.g., does not affect
implementation of the applicable regulation in this part for other
affected sources, does not set a national precedent, and individually
does not result in a revision to the monitoring requirements); and
(iii) Is site-specific, made to reflect or accommodate the
operational characteristics, physical constraints, or safety concerns of
an affected source.
(2) Examples of minor changes to monitoring include, but are not
limited to:
(i) Modifications to a sampling procedure, such as use of an
improved sample conditioning system to reduce maintenance requirements;
(ii) Increased monitoring frequency; and
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(iii) Modification of the environmental shelter to moderate
temperature fluctuation and thus protect the analytical instrumentation.
Minor change to test method means:
(1) A modification to a federally enforceable test method that:
(i) Does not decrease the stringency of the emission limitation or
standard;
(ii) Has no national significance (e.g., does not affect
implementation of the applicable regulation in this part for other
affected sources, does not set a national precedent, and individually
does not result in a revision to the test method); and
(iii) Is site-specific, made to reflect or accommodate the
operational characteristics, physical constraints, or safety concerns of
an affected source.
(2) Examples of minor changes to a test method include, but are not
limited to:
(i) Field adjustments in a test method's sampling procedure, such as
a modified sampling traverse or location to avoid interference from an
obstruction in the stack, increasing the sampling time or volume, use of
additional impingers for a high moisture situation, accepting
particulate emission results for a test run that was conducted with a
lower than specified temperature, substitution of a material in the
sampling train that has been demonstrated to be more inert for the
sample matrix; and
(ii) Changes in recovery and analytical techniques such as a change
in quality control/quality assurance requirements needed to adjust for
analysis of a certain sample matrix.
Nonautomated monitoring and recording system means manual reading of
values measured by monitoring instruments and manual transcription of
those values to create a record. Nonautomated systems do not include
strip charts nor circular charts.
Nonrepairable means that it is technically infeasible to repair a
piece of equipment from which a leak has been detected without a process
unit shutdown.
One-hour period means the 60-minute period commencing on the hour.
Onsite or on-site means, with respect to records required to be
maintained by this part, that the records are stored at a location
within a plant site that encompasses the regulated source. Onsite
includes, but is not limited to, storage at the regulated source to
which the records pertain, or storage in central files elsewhere at the
plant site.
Open-ended valve or line means any valve except relief valves having
one side of the valve seat in contact with process fluid and one side
open to the atmosphere, either directly or through open piping.
Organic monitoring device means a device used to indicate the
concentration level of organic compounds based on a detection principle
such as infrared, photo ionization, or thermal conductivity.
Owner or operator means any person who owns, leases, operates,
controls, or supervises a regulated source or a stationary source of
which a regulated source is a part.
Part 70 permit means any permit issued, renewed, or revised pursuant
to part 70 of this chapter.
Performance test means the collection of data resulting from the
execution of a test method (usually three emission test runs) used to
demonstrate compliance with a relevant emission standard as specified in
the performance test section of the relevant standard.
Permit program means a comprehensive State operating permit system
established pursuant to title V of the Act (42 U.S.C. 7661) and
regulations codified in part 70 of this chapter and applicable State
regulations, or a comprehensive Federal operating permit system
established pursuant to title V of the Act and regulations codified in
part 71 of this chapter.
Permitting authority means one of the following:
(1) The State air pollution control agency, local agency, other
State agency, or other agency authorized by the Administrator to carry
out a permit program under part 70 of this chapter; or
(2) The Administrator, in the case of EPA-implemented permit
programs under title V of the Act (42 U.S.C. 7661) and part 71 of this
chapter.
Plant site means all contiguous or adjoining property that is under
common control, including properties that are
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separated only by a road or other public right-of-way. Common control
includes properties that are owned, leased, or operated by the same
entity, parent entity, subsidiary, or any combination thereof.
Polymerizing monomer means, for the purposes of this part, a
compound which may form polymer buildup in pump mechanical seals
resulting in rapid mechanical seal failure.
Pressure release means the emission of materials resulting from the
system pressure being greater than the set pressure of the relief
device. This release can be one release or a series of releases over a
short time period.
Pressure relief device or valve means a device used to prevent
operating pressures from exceeding the maximum allowable working
pressure of the process equipment. A common pressure relief device is a
spring-loaded pressure relief valve. Devices that are actuated either by
a pressure of less than or equal to 2.5 pounds per square inch gauge or
by a vacuum are not pressure relief devices.
Primary fuel means the fuel that provides the principal heat input
to the device. To be considered primary, the fuel must be able to
sustain operation without the addition of other fuels.
Process heater means an enclosed combustion device that transfers
heat liberated by burning fuel directly to process streams or to heat
transfer liquids other than water. A process heater may, as a secondary
function, heat water in unfired heat recovery sections.
Process unit means the equipment specified in the definitions of
process unit or chemical manufacturing process unit in the applicable
referencing subpart. If the referencing subpart does not define process
unit, then, for the purposes of this part, process unit means the
equipment assembled and connected by pipes or ducts to process raw
materials and to manufacture an intended product.
Process unit shutdown means a work practice or operational procedure
that stops production from a process unit or part of a process unit
during which it is technically feasible to clear process material from a
process unit or part of a process unit consistent with safety
constraints and during which repairs can be effected. An unscheduled
work practice or operational procedure that stops production from a
process unit or part of a process unit for less than 24 hours is not a
process unit shutdown. An unscheduled work practice or operational
procedure that would stop production from a process unit or part of a
process unit for a shorter period of time than would be required to
clear the process unit or part of the process unit of materials and
start up the unit, and would result in greater emissions than delay of
repair of leaking components until the next scheduled process unit
shutdown is not a process unit shutdown. The use of spare equipment and
technically feasible bypassing of equipment without stopping production
are not process unit shutdowns.
Process vent means a process vent or vent stream as they are defined
in the referencing subpart.
Recovery device means an individual unit of equipment capable of and
normally used for the purpose of recovering chemicals for fuel value
(i.e., net positive heating value), use, reuse, or for sale for fuel
value, use, or reuse. Equipment capable of and used for the purpose of
recovering chemicals, but not normally for use, reuse or sale, are not
recovery devices but are control devices. Examples of equipment that may
be recovery devices include absorbers, carbon adsorbers, condensers,
oil-water separators or organic-water separators, or organic removal
devices such as decanters, strippers, or thin-film evaporation units.
Reference method means any method of sampling and analyzing for an
air pollutant as specified in an applicable subpart, the appendices to
40 CFR part 60 or 63, or in appendix B of 40 CFR part 61.
Referencing subpart means 40 CFR part 60, subparts Ka, Kb, VV, DDD,
III, NNN, and RRR; 40 CFR part 61, subparts V, Y, and BB; and 40 CFR
part 63, subparts G and H.
Regulated material means, for the purposes of this part, the
material regulated by the specific referencing subpart, including
volatile organic liquids (VOL), volatile organic compounds (VOC),
organic hazardous air pollutants (HAP's), benzene, vinyl chloride,
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or other chemicals or groups of chemicals.
Regulated source means, for the purposes of this part, the
stationary source, the group of stationary sources, or the portion of a
stationary source that is regulated by a relevant standard or other
requirement established pursuant to this part, or 40 CFR part 60, 61, or
63.
Relief device or valve means a device or valve used only to release
an unplanned, nonroutine discharge. A relief device or valve discharge
can result from an operator error, a malfunction such as a power failure
or equipment failure, or other unexpected cause that requires immediate
venting of gas from process equipment in order to avoid safety hazards
or equipment damage.
Repaired means, for the purposes of subparts F and G of this part,
that equipment meets the following conditions:
(1) Is adjusted, or otherwise altered, to eliminate a leak as
defined in the applicable section of this part; and
(2) Unless otherwise specified in applicable provisions of this
part, is monitored as specified in Sec. 65.104(b) and Sec. 65.143(c)
to verify that emissions from the equipment are below the applicable
leak definition.
Routed to a process or route to a process means the emissions are
conveyed to any enclosed portion of a process unit where the emissions
are predominantly recycled and/or consumed in the same manner as a
material that fulfills the same function in the process and/or
transformed by chemical reaction into materials that are not regulated
materials and/or incorporated into a product; and/or recovered.
Run means one of a series of emission or other measurements needed
to determine emissions for a representative operating period or cycle as
specified in this part. Unless otherwise specified, a run may be either
intermittent or continuous within the limits of good engineering
practice.
Sampling connection system means an assembly of equipment within a
process unit used during periods of representative operation to take
samples of the process fluid. Equipment used to take nonroutine grab
samples is not considered a sampling connection system.
Secondary fuel means a fuel fired through a burner other than the
primary fuel burner that provides supplementary heat in addition to the
heat provided by the primary fuel.
Sensor means a device that measures a physical quantity or the
change in a physical quantity, such as temperature, pressure, flow rate,
pH, or liquid level.
Set pressure means, for the purposes of subparts F and G of this
part, the pressure at which a properly operating pressure relief device
begins to open to relieve atypical process system operating pressure.
Shutdown means the cessation of operation of a regulated source (for
example, chemical manufacturing process unit or a reactor, air oxidation
reactor, distillation unit) and equipment required or used to comply
with this part, or the emptying and degassing of a storage vessel.
Shutdown is defined here for purposes including, but not limited to,
periodic maintenance, replacement of equipment, or repair. Shutdown does
not include the routine rinsing or washing of equipment in batch
operation between batches.
Simultaneous loading means, for a shared control device, loading of
regulated materials from more than one transfer arm at the same time so
that the beginning and ending times of loading cycles coincide or
overlap and there is no interruption in vapor flow to the shared control
device.
Single-seal system means, for the purposes of subpart C of this
part, a floating roof having one continuous seal. This seal may be a
vapor-mounted, liquid-mounted, or metallic shoe seal.
Specific gravity monitoring device means a unit of equipment used to
monitor specific gravity and having a minimum accuracy of 0.02 specific gravity units.
Startup means the setting into operation of a regulated source (for
example, chemical manufacturing process unit or a reactor, air oxidation
reactor, distillation unit, a storage vessel after emptying and
degassing) and/or equipment required or used to comply with this part.
Startup includes initial startup, operation solely for testing
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equipment, the recharging of equipment in batch operation, and
transitional conditions due to changes in product for flexible operation
units.
State means all non-Federal authorities, including local agencies,
interstate associations, and statewide programs, that have delegated
authority to implement the provisions of this part; the referencing
subparts; and/or the permit program established under part 70 of this
chapter. The term State shall have its conventional meaning where clear
from the context.
Steam jet ejector means a steam nozzle that discharges a high-
velocity jet across a suction chamber that is connected to the equipment
to be evacuated.
Stuffing box pressure means the fluid (liquid or gas) pressure
inside the casing or housing of a piece of equipment, on the process
side of the inboard seal.
Surge control vessel means feed drums, recycle drums, and
intermediate vessels. Surge control vessels are used within a process
unit (as defined in the specific subpart that references this part) when
in-process storage, mixing, or management of flow rates or volumes is
needed to assist in production of a product.
Temperature monitoring device means a unit of equipment used to
monitor temperature and having a minimum accuracy of 1 percent of the temperature being monitored expressed
in degrees Celsius or 1.2 degrees Celsius (
[deg]C), whichever is greater.
Title V permit means any permit issued, renewed, or revised pursuant
to Federal or State regulations established under 40 CFR part 70 or 71
to implement title V of the Act (42 U.S.C. 7661).
Total organic compounds or TOC means those compounds measured
according to the procedures specified in Sec. 65.64(c) and Sec.
65.158(b)(3)(ii)(A), as applicable. Those compounds that the
Administrator has determined do not contribute appreciably to the
formation of ozone and that are specifically excluded from the
definition of volatile organic compound at 40 CFR 51.100(s), as amended,
are to be excluded for the purposes of measuring the hourly emission
rate as required in Sec. 65.64(f) for process vents subject to subpart
III, NNN, or RRR of part 60 of this chapter.
Total resource effectiveness index value or TRE index value means a
calculated value used to determine whether control is required for a
process vent. It is based on process vent flow rate, emission rate of
regulated material, net heating value, and corrosion properties
(halogenated compound content), as quantified by the equations given
under Sec. 65.64(h).
Vapor balancing system means a piping system that is designed to
collect regulated material vapors displaced from tank trucks or railcars
during loading and to route the collected regulated material vapors to
the storage vessel from which the liquid being loaded originated, or to
another storage vessel connected by a common header; or to compress and
route to a process or a fuel gas system the collected regulated material
vapors.
Vapor-mounted seal means a continuous seal that is mounted so that
there is a vapor space between the stored liquid and the bottom of the
seal.
Visible emission means the observation of an emission of opacity or
optical density above the threshold of vision.