and basis for the estimates of maximum mercury fuel input or mercury
emission rates. You can use the results from one fuel analysis for
multiple boilers and process heaters provided they are all burning the
same fuel type. However, you must calculate mercury fuel input, or
mercury emission rates, for each boiler and process heater.
    (6) If, consistent with Sec.  63.7515(b) and (c), you choose to
stack test less frequently than annually, you must keep annual records
that document that your emissions in the previous stack test(s) were
less than 75 percent of the applicable emission limit (or, in specific
instances noted in Tables 1 and 2 to this subpart, less than the
applicable emission limit), and document that there was no change in
source operations including fuel composition and operation of air
pollution control equipment that would cause emissions of the relevant
pollutant to increase within the past year.
    (7) Records of the occurrence and duration of each malfunction of
the boiler or process heater, or of the associated air pollution
control and monitoring equipment.
    (8) Records of actions taken during periods of malfunction to
minimize emissions in accordance with the general duty to minimize
emissions in Sec.  63.7500(a)(3), including corrective actions to
restore the malfunctioning boiler or process heater, air pollution
control, or monitoring equipment to its normal or usual manner of
operation.
    (9) A copy of all calculations and supporting documentation of
maximum total selected metals fuel input, using Equation 9 of Sec.
63.7530, that were done to demonstrate continuous compliance with the
total selected metals emission limit for sources that demonstrate
compliance through performance testing. For sources that demonstrate
compliance through fuel analysis, a copy of all calculations and
supporting documentation of total selected metals emission rates, using
Equation 13 of Sec.  63.7530, that were done to demonstrate compliance
with the total selected metals emission limit. Supporting documentation
should include results of any fuel analyses and basis for the estimates
of maximum total selected metals fuel input or total selected metals
emission rates. You can use the results from one fuel analysis for
multiple boilers and process heaters provided they are all burning the
same fuel type. However, you must calculate total selected metals fuel
input, or total selected metals emission rates, for each boiler and
process heater.
    (e) If you elect to average emissions consistent with Sec.
63.7522, you must additionally keep a copy of the emission averaging
implementation plan required in Sec.  63.7522(g), all calculations
required under Sec.  63.7522, including monthly

records of heat input or steam generation, as applicable, and
monitoring records consistent with Sec.  63.7541.
    (f) If you elect to use emission credits from energy conservation
measures to demonstrate compliance according to Sec.  63.7533, you must
keep a copy of the Implementation Plan required in Sec.  63.7533(d) and
copies of all data and calculations used to establish credits according
to Sec.  63.7533(b), (c), and (f).
    (g) If you elected to demonstrate that the unit meets the
specification for mercury for the other gas 1 subcategory and you
cannot submit a signed certification under Sec.  63.7545(g) because the
constituents could exceed the specification, you must maintain monthly
records of the calculations and results of the fuel specification for
mercury in Table 6.
    (h) If you operate a unit designed to burn natural gas, refinery
gas, or other gas 1 fuel that is subject to this subpart, and you use
an alternative fuel other than natural gas, refinery gas, gaseous fuel
subject to another subpart under this part, or other gas 1 fuel, you
must keep records of the total hours per calendar year that alternative
fuel is burned.
    (i) For each startup or shutdown event, you must maintain records
that boiler operators have completed training for startup and shutdown
procedures.

Sec.  63.7560  In what form and how long must I keep my records?

    (a) Your records must be in a form suitable and readily available
for expeditious review, according to Sec.  63.10(b)(1).
    (b) As specified in Sec.  63.10(b)(1), you must keep each record
for 5 years following the date of each occurrence, measurement,
maintenance, corrective action, report, or record.
    (c) You must keep each record on site, or they must be accessible
from on site (for example, through a computer network), for at least 2
years after the date of each occurrence, measurement, maintenance,
corrective action, report, or record, according to Sec.  63.10(b)(1).
You can keep the records off site for the remaining 3 years.

Other Requirements and Information

Sec.  63.7565  What parts of the General Provisions apply to me?

    Table 10 to this subpart shows which parts of the General
Provisions in Sec. Sec.  63.1 through 63.15 apply to you.

Sec.  63.7570  Who implements and enforces this subpart?

    (a) This subpart can be implemented and enforced by EPA, or a
delegated authority such as your state, local, or tribal agency. If the
EPA Administrator has delegated authority to your state, local, or
tribal agency, then that agency (as well as EPA) has the authority to
implement and enforce this subpart. You should contact your EPA
Regional Office to find out if this subpart is delegated to your state,
local, or tribal agency.
    (b) In delegating implementation and enforcement authority of this
subpart to a state, local, or tribal agency under 40 CFR part 63,
subpart E, the authorities listed in paragraphs (b)(1) through (5) of
this section are retained by the EPA Administrator and are not
transferred to the state, local, or tribal agency, however, EPA retains
oversight of this subpart and can take enforcement actions, as
appropriate.
    (1) Approval of alternatives to the non-opacity emission limits and
work practice standards in Sec.  63.7500(a) and (b) under Sec.
63.6(g).
    (2) Approval of alternative opacity emission limits in Sec.
63.7500(a) under Sec.  63.6(h)(9).
    (3) Approval of major change to test methods in Table 5 to this
subpart under Sec.  63.7(e)(2)(ii) and (f) and as defined in Sec.
63.90, and alternative analytical methods requested under Sec.
63.7521(b)(2).
    (4) Approval of major change to monitoring under Sec.  63.8(f) and
as defined in Sec.  63.90, and approval of alternative operating
parameters under Sec.  63.7500(a)(2) and Sec.  63.7522(g)(2).
    (5) Approval of major change to recordkeeping and reporting under
Sec.  63.10(e) and as defined in Sec.  63.90.

Sec.  63.7575  What definitions apply to this subpart?

    Terms used in this subpart are defined in the Clean Air Act, in
Sec.  63.2 (the General Provisions), and in this section as follows:
    30-day rolling average means the arithmetic mean of all valid data
from 30 successive operating days that is calculated for each operating
day using the data from that operating day and the previous 29
operating days.
    Affirmative defense means, in the context of an enforcement
proceeding, a response or defense put forward by a defendant, regarding
which the defendant has the burden of proof, and the merits of which
are independently and objectively evaluated in a judicial or
administrative proceeding.
    Annual heat input means the heat input for the 12 months preceding
the compliance demonstration.
    Average annual heat input rate means annual heat input divided by
the hours of operation for the 12 months preceding the compliance
demonstration.
    Bag leak detection system means a group of instruments that are
capable of monitoring particulate matter loadings in the exhaust of a
fabric filter (i.e., baghouse) in order to detect bag failures. A bag
leak detection system includes, but is not limited to, an instrument
that operates on electrodynamic, triboelectric, light scattering, light
transmittance, or other principle to monitor relative particulate
matter loadings.
    Benchmarking means a process of comparison against standard or
average.
    Biodiesel means a mono-akyl ester derived from biomass and
conforming to ASTM D6751-08, Standard Specification for Biodiesel Fuel
Blend Stock (B100) for Middle Distillate Fuels (incorporated by
reference, see Sec.  63.14).
    Biomass or bio-based solid fuel means any biomass-based solid fuel
that is not a solid waste. This includes, but is not limited to, wood
residue; wood products (e.g., trees, tree stumps, tree limbs, bark,
lumber, sawdust, sander dust, chips, scraps, slabs, millings, and
shavings); animal manure, including litter and other bedding materials;
vegetative agricultural and silvicultural materials, such as logging
residues (slash), nut and grain hulls and chaff (e.g., almond, walnut,
peanut, rice, and wheat), bagasse, orchard prunings, corn stalks,
coffee bean hulls and grounds. This definition of biomass is not
intended to suggest that these materials are or are not solid waste.
    Blast furnace gas fuel-fired boiler or process heater means an
industrial/commercial/institutional boiler or process heater that
receives 90 percent or more of its total annual gas volume from blast
furnace gas.
    Boiler means an enclosed device using controlled flame combustion
and having the primary purpose of recovering thermal energy in the form
of steam or hot water. Controlled flame combustion refers to a steady-
state, or near steady-state, process wherein fuel and/or oxidizer feed
rates are controlled. A device combusting solid waste, as defined in
Sec.  241.3, is not a boiler unless the device is exempt from the
definition of a solid waste incineration unit as provided in section
129(g)(1) of the Clean Air Act. Waste heat boilers that use only
natural gas, refinery gas, or other gas 1 fuels for supplemental fuel
are excluded from this definition.
    Boiler system means the boiler and associated components, such as,
the feed water system, the combustion air system, the fuel system
(including burners), blowdown system, combustion

control system, and energy consuming systems.
    Calendar year means the period between January 1 and December 31,
inclusive, for a given year.
    Coal means all solid fuels classifiable as anthracite, bituminous,
sub-bituminous, or lignite by ASTM D388 (incorporated by reference, see
Sec.  63.14), coal refuse, and petroleum coke. For the purposes of this
subpart, this definition of ``coal'' includes synthetic fuels derived
from coal for creating useful heat, including but not limited to,
solvent-refined coal, coal-oil mixtures, and coal-water mixtures. Coal
derived gases are excluded from this definition.
    Coal refuse means any by-product of coal mining or coal cleaning
operations with an ash content greater than 50 percent (by weight) and
a heating value less than 13,900 kilojoules per kilogram (6,000 Btu per
pound) on a dry basis.
    Commercial/institutional boiler means a boiler used in commercial
establishments or institutional establishments such as medical centers,
research centers, institutions of higher education, hotels, and
laundries to provide steam and/or hot water.
    Common stack means the exhaust of emissions from two or more
affected units through a single flue. Affected units with a common
stack may each have separate air pollution control systems located
before the common stack, or may have a single air pollution control
system located after the exhausts come together in a single flue.
    Cost-effective energy conservation measure means a measure that is
implemented to improve the energy efficiency of the boiler or facility
that has a payback (return of investment) period of 2 years or less.
    Daily block average means the arithmetic mean of all valid emission
concentrations or parameter levels recorded when a unit is operating
measured over the 24-hour period from 12 a.m. (midnight) to 12 a.m.
(midnight).
    Deviation. (1) Means any instance in which an affected source
subject to this subpart, or an owner or operator of such a source:
    (i) Fails to meet any requirement or obligation established by this
subpart including, but not limited to, any emission limit, operating
limit, or work practice standard; or
    (ii) Fails to meet any term or condition that is adopted to
implement an applicable requirement in this subpart and that is
included in the operating permit for any affected source required to
obtain such a permit.
    (2) A deviation is not always a violation. The determination of
whether a deviation constitutes a violation of the standard is up to
the discretion of the entity responsible for enforcement of the
standards.
    Dioxins/furans means tetra- through octa-chlorinated dibenzo-p-
dioxins and dibenzofurans.
    Distillate oil means fuel oils, including recycled oils, that
comply with the specifications for fuel oil numbers 1 and 2, as defined
by ASTM D396 (incorporated by reference, see Sec.  63.14).
    Dry scrubber means an add-on air pollution control system that
injects dry alkaline sorbent (dry injection) or sprays an alkaline
sorbent (spray dryer) to react with and neutralize acid gas in the
exhaust stream forming a dry powder material. Sorbent injection systems
in fluidized bed boilers and process heaters are included in this
definition. A dry scrubber is a dry control system.
    Dutch oven means a unit having a refractory-walled cell connected
to a conventional boiler setting. Fuel materials are introduced through
an opening in the roof of the dutch oven and burn in a pile on its
floor. Fluidized bed boilers are not part of the dutch oven design
category.
    Electric utility steam generating unit means a fossil fuel-fired
combustion unit of more than 25 megawatts that serves a generator that
produces electricity for sale. A fossil fuel-fired unit that
cogenerates steam and electricity and supplies more than one-third of
its potential electric output capacity and more than 25 megawatts
electrical output to any utility power distribution system for sale is
considered an electric utility steam generating unit. To be ``capable
of combusting'' fossil fuels, an EGU would need to have these fuels
allowed in their operating permits and have the appropriate fuel
handling facilities on-site or otherwise available (e.g., coal handling
equipment, including coal storage area, belts and conveyers,
pulverizers, etc.; oil storage facilities). In addition, fossil fuel-
fired EGU means any EGU that fired fossil fuel for more than 10.0
percent of the average annual heat input in any 3 consecutive calendar
years or for more than 15.0 percent of the annual heat input during any
one calendar year after [COMPLIANCE DATE OF THE FINAL EGU RULE].
    Electrostatic precipitator (ESP) means an add-on air pollution
control device used to capture particulate matter by charging the
particles using an electrostatic field, collecting the particles using
a grounded collecting surface, and transporting the particles into a
hopper. An electrostatic precipitator is usually a dry control system.
    Emission credit means emission reductions above those required by
this subpart. Emission credits generated may be used to comply with the
emissions limits. Credits may come from pollution prevention projects
that result in reduced fuel use by affected units. Shutdowns cannot be
used to generate credits.
    Energy assessment means the following only as this term is used in
Table 3 to this subpart.
    (1) Energy assessment for facilities with affected boilers and
process heaters using less than 0.3 trillion Btu per year heat input
will be 8 technical labor hours in length maximum, but may be longer at
the discretion of the owner or operator of the affected source. The
boiler system and energy use system accounting for at least 50 percent
of the energy output will be evaluated to identify energy savings
opportunities, within the limit of performing an 8-hour energy
assessment.
    (2) The Energy assessment for facilities with affected boilers and
process heaters using 0.3 to 1.0 trillion Btu per year will be 24
technical labor hours in length maximum, but may be longer at the
discretion of the owner or operator. The boiler system and any energy
use system accounting for at least 33 percent of the energy output will
be evaluated to identify energy savings opportunities, within the limit
of performing a 24-hour energy assessment.
    (3) In the Energy assessment for facilities with affected boilers
and process heaters using greater than 1.0 trillion Btu per year, the
boiler system and any energy use system accounting for at least 20
percent of the energy output will be evaluated to identify energy
savings opportunities.
    Energy management practices means the set of practices and
procedures designed to manage energy use that are demonstrated by the
facility's energy policies, a facility energy manager and other
staffing responsibilities, energy performance measurement and tracking
methods, an energy saving goal, action plans, operating procedures,
internal reporting requirements, and periodic review intervals used at
the facility.
    Energy use system includes, but is not limited to, process heating;
compressed air systems; machine drive (motors, pumps, fans); process
cooling; facility heating, ventilation, and air-conditioning systems;
hot water systems; building envelop; and lighting.
    Equivalent means the following only as this term is used in Table 6
to this subpart:

    (1) An equivalent sample collection procedure means a published
voluntary consensus standard or practice (VCS) or EPA method that
includes collection of a minimum of three composite fuel samples, with
each composite consisting of a minimum of three increments collected at
approximately equal intervals over the test period.
    (2) An equivalent sample compositing procedure means a published
VCS or EPA method to systematically mix and obtain a representative
subsample (part) of the composite sample.
    (3) An equivalent sample preparation procedure means a published
VCS or EPA method that: Clearly states that the standard, practice or
method is appropriate for the pollutant and the fuel matrix; or is
cited as an appropriate sample preparation standard, practice or method
for the pollutant in the chosen VCS or EPA determinative or analytical
method.
    (4) An equivalent procedure for determining heat content means a
published VCS or EPA method to obtain gross calorific (or higher
heating) value.
    (5) An equivalent procedure for determining fuel moisture content
means a published VCS or EPA method to obtain moisture content. If the
sample analysis plan calls for determining metals (especially the
mercury, selenium, or arsenic) using an aliquot of the dried sample,
then the drying temperature must be modified to prevent vaporizing
these metals. On the other hand, if metals analysis is done on an ``as
received'' basis, a separate aliquot can be dried to determine moisture
content and the metals concentration mathematically adjusted to a dry
basis.
    (6) An equivalent pollutant (mercury, hydrogen chloride)
determinative or analytical procedure means a published VCS or EPA
method that clearly states that the standard, practice, or method is
appropriate for the pollutant and the fuel matrix and has a published
detection limit equal or lower than the methods listed in Table 6 to
this subpart for the same purpose.
    Fabric filter means an add-on air pollution control device used to
capture particulate matter by filtering gas streams through filter
media, also known as a baghouse. A fabric filter is a dry control
system.
    Federally enforceable means all limitations and conditions that are
enforceable by the EPA Administrator, including the requirements of 40
CFR parts 60 and 61, requirements within any applicable state
implementation plan, and any permit requirements established under 40
CFR 52.21 or under 40 CFR 51.18 and 40 CFR 51.24.
    Fluidized bed boiler means a boiler utilizing a fluidized bed
combustion process that is not a pulverized coal boiler.
    Fluidized bed combustion means a process where a fuel is burned in
a bed of granulated particles, which are maintained in a mobile
suspension by the forward flow of air and combustion products.
    Fuel cell means a boiler type in which the fuel is dropped onto
suspended fixed grates and is fired in a pile. The refractory-lined
fuel cell uses combustion air preheating and positioning of secondary
and tertiary air injection ports to improve boiler efficiency.
Fluidized bed, dutch oven, pile burner, hybrid suspension grate, and
suspension burners are not part of the fuel cell subcategory.
    Fuel type means each category of fuels that share a common name or
classification. Examples include, but are not limited to, bituminous
coal, sub-bituminous coal, lignite, anthracite, biomass, residual oil.
Individual fuel types received from different suppliers are not
considered new fuel types.
    Gaseous fuel includes, but is not limited to, natural gas, process
gas, landfill gas, coal derived gas, refinery gas, and biogas. Blast
furnace gas is exempted from this definition.
    Heat input means heat derived from combustion of fuel in a boiler
or process heater and does not include the heat input from preheated
combustion air, recirculated flue gases, or exhaust gases from other
sources such as gas turbines, internal combustion engines, kilns, etc.
    Heavy Liquid includes residual oil and any other liquid fuel not
classified as a light liquid.
    Hourly average means the arithmetic average of at least four CMS
data values representing the four 15-minute periods in an hour, or at
least two 15-minute data values during an hour when CMS calibration,
quality assurance, or maintenance activities are being performed.
    Hot water heater means a closed vessel with a capacity of no more
than 120 U.S. gallons in which water is heated by combustion of gaseous
or liquid fuel and is withdrawn for use external to the vessel at
pressures not exceeding 160 psig, including the apparatus by which the
heat is generated and all controls and devices necessary to prevent
water temperatures from exceeding 210 degrees Fahrenheit (99 degrees
Celsius). Hot water boilers (i.e., not generating steam) combusting
gaseous or liquid fuel with a heat input capacity of less than 1.6
million Btu per hour are included in this definition. Hot water heater
also means a tankless unit that provides on demand hot water.
    Hybrid suspension grate boiler means a boiler designed with air
distributors to spread the fuel material over the entire width and
depth of the boiler combustion zone. The fuel combusted in these units
exceed a moisture content of 40 percent on an as-fired basis. The
drying and much of the combustion of the fuel takes place in
suspension, and the combustion is completed on the grate or floor of
the boiler. Fluidized bed, dutch oven, and pile burner designs are not
part of the hybrid suspension grate boiler design category.
    Industrial boiler means a boiler used in manufacturing, processing,
mining, and refining or any other industry to provide steam and/or hot
water.
    Light liquid includes distillate oil, biodiesel or vegetable oil.
    Limited-use boiler or process heater means any boiler or process
heater that burns any amount of solid, liquid, or gaseous fuels, has a
rated capacity of greater than 10 MMBtu per hour heat input, and has a
federally enforceable limit of no more than 876 hours per year of
operation.
    Liquid fuel includes, but is not limited to, distillate oil,
residual oil, on-spec used oil, biodiesel and vegetable oil.
    Load fraction means the actual heat input of the boiler or process
heater divided by the average operating load determined according to
Table 7 to this subpart.
    Metal process furnaces include natural gas-fired annealing
furnaces, preheat furnaces, reheat furnaces, aging furnaces, heat treat
furnaces, and homogenizing furnaces.
    Million Btu (MMBtu) means one million British thermal units.
    Minimum activated carbon injection rate means load fraction
(percent) multiplied by the lowest hourly average activated carbon
injection rate measured according to Table 7 to this subpart during the
most recent performance test demonstrating compliance with the
applicable emission limits.
    Minimum pressure drop means the lowest hourly average pressure drop
measured according to Table 7 to this subpart during the most recent
performance test demonstrating compliance with the applicable emission
limit.
    Minimum scrubber effluent pH means the lowest hourly average
sorbent liquid pH measured at the inlet to the wet scrubber according
to Table 7 to this subpart during the most recent performance test
demonstrating compliance with the applicable hydrogen chloride emission
limit.

    Minimum scrubber liquid flow rate means the lowest hourly average
liquid flow rate (e.g., to the PM scrubber or to the acid gas scrubber)
measured according to Table 7 to this subpart during the most recent
performance test demonstrating compliance with the applicable emission
limit.
    Minimum scrubber pressure drop means the lowest hourly average
scrubber pressure drop measured according to Table 7 to this subpart
during the most recent performance test demonstrating compliance with
the applicable emission limit.
    Minimum sorbent injection rate means load fraction (percent)
multiplied by the lowest hourly average sorbent injection rate for each
sorbent measured according to Table 7 to this subpart during the most
recent performance test demonstrating compliance with the applicable
emission limits.
    Minimum total secondary electric power means the lowest hourly
average total secondary electric power determined from the values of
secondary voltage and secondary current to the electrostatic
precipitator measured according to Table 7 to this subpart during the
most recent performance test demonstrating compliance with the
applicable emission limits.
    Natural gas means:
    (1) A naturally occurring mixture of hydrocarbon and nonhydrocarbon
gases found in geologic formations beneath the earth's surface, of
which the principal constituent is methane; or
    (2) Liquid petroleum gas, as defined in ASTM D1835 (incorporated by
reference, see Sec.  63.14); or
    (3) A mixture of hydrocarbons that maintains a gaseous state at ISO
conditions. Additionally, natural gas must either be composed of at
least 70 percent methane by volume or have a gross calorific value
between 34 and 43 mega joules (MJ) per dry standard cubic meter (910
and 1,150 Btu per dry standard cubic foot); or
    (4) Propane or propane derived synthetic natural gas. Propane means
a colorless gas derived from petroleum and natural gas, with the
molecular structure C3H8.
    Opacity means the degree to which emissions reduce the transmission
of light and obscure the view of an object in the background.
    Operating day means a 24-hour period between 12 midnight and the
following midnight during which any fuel is combusted at any time in
the boiler or process heater unit. It is not necessary for fuel to be
combusted for the entire 24-hour period.
    Other combustor means a unit designed to burn solid fuel that is
not classified as a dutch oven, fluidized bed, fuel cell, hybrid
suspension grate boiler, pulverized coal boiler, stoker, sloped grate,
or suspension boiler as defined in this subpart.
    Other gas 1 fuel means a gaseous fuel that is not natural gas or
refinery gas and does not exceed the maximum concentration of 40
micrograms/cubic meters of mercury.
    Oxygen analyzer system means all equipment required to determine
the oxygen content of a gas stream and used to monitor oxygen in the
boiler flue gas or firebox. This definition includes oxygen trim
systems. The source owner or operator must install, calibrate,
maintain, and operate the oxygen analyzer system in accordance with the
manufacturer's recommendations.
    Oxygen trim system means a system of monitors that is used to
maintain excess air at the desired level in a combustion device. A
typical system consists of a flue gas oxygen and/or carbon monoxide
monitor that automatically provides a feedback signal to the combustion
air controller.
    Particulate matter (PM) means any finely divided solid or liquid
material, other than uncombined water, as measured by the test methods
specified under this subpart, or an approved alternative method.
    Period of gas curtailment or supply interruption means a period of
time during which the supply of gaseous fuel to an affected facility is
halted for reasons beyond the control of the facility. The act of
entering into a contractual agreement with a supplier of natural gas
established for curtailment purposes does not constitute a reason that
is under the control of a facility for the purposes of this definition.
An increase in the cost or unit price of natural gas due to normal
market fluctuations not during periods of supplier delivery restriction
does not constitute a period of natural gas curtailment or supply
interruption. On-site gaseous fuel system emergencies or equipment
failures qualify as periods of supply interruption when the emergency
or failure is beyond the control of the facility.
    Pile burner means a boiler design incorporating a design where the
anticipated biomass fuel has a high relative moisture content. Grates
serve to support the fuel, and underfire air flowing up through the
grates provides oxygen for combustion, cools the grates, promotes
turbulence in the fuel bed, and fires the fuel. The most common form of
pile burning is the dutch oven.
    Process heater means an enclosed device using controlled flame, and
the unit's primary purpose is to transfer heat indirectly to a process
material (liquid, gas, or solid) or to a heat transfer material for use
in a process unit, instead of generating steam. Process heaters include
units heating hot water as a process heat transfer medium. Process
heaters are devices in which the combustion gases do not come into
direct contact with process materials. A device combusting solid waste,
as defined in Sec.  241.3, is not a process heater unless the device is
exempt from the definition of a solid waste incineration unit as
provided in section 129(g)(1) of the Clean Air Act. Process heaters do
not include units used for comfort heat or space heat, food preparation
for on-site consumption, or autoclaves. Waste heat process heaters that
use only natural gas, refinery gas, or other gas 1 fuels for
supplemental fuel are excluded from this definition.
    Pulverized coal boiler means a boiler in which pulverized coal or
other solid fossil fuel is introduced into an air stream that carries
the coal to the combustion chamber of the boiler where it is fired in
suspension.
    Qualified energy assessor means:
    (1) Someone who has demonstrated capabilities to evaluate energy
savings opportunities for steam generation and major energy using
systems, including, but not limited to:
    (i) Boiler combustion management.
    (ii) Boiler thermal energy recovery, including
    (A) Conventional feed water economizer,
    (B) Conventional combustion air preheater, and
    (C) Condensing economizer.
    (iii) Boiler blowdown thermal energy recovery.
    (iv) Primary energy resource selection, including
    (A) Fuel (primary energy source) switching, and
    (B) Applied steam energy versus direct-fired energy versus
electricity.
    (v) Insulation issues.
    (vi) Steam trap and steam leak management.
    (vi) Condensate recovery.
    (viii) Steam end-use management.
    (2) Capabilities and knowledge includes, but is not limited to:
    (i) Background, experience, and recognized abilities to perform the
assessment activities, data analysis, and report preparation.
    (ii) Familiarity with operating and maintenance practices for steam
or process heating systems.
    (iii) Additional potential steam system improvement opportunities

including improving steam turbine operations and reducing steam demand.
    (iv) Additional process heating system opportunities including
effective utilization of waste heat and use of proper process heating
methods.
    (v) Boiler-steam turbine cogeneration systems.
    (vi) Industry specific steam end-use systems.
    Refinery gas means any gas that is generated at a petroleum
refinery and is combusted. Refinery gas includes natural gas when the
natural gas is combined and combusted in any proportion with a gas
generated at a refinery. Refinery gas includes gases generated from
other facilities when that gas is combined and combusted in any
proportion with gas generated at a refinery.
    Residential boiler means a boiler used in a dwelling containing
four or fewer family units to provide heat and/or hot water. This
definition includes boilers used primarily to provide heat and/or hot
water for a dwelling containing four or fewer families located at an
institutional facility (e.g., university campus, military base, church
grounds) or commercial/industrial facility (e.g., farm).
    Residual oil means crude oil, and all fuel oil numbers 4, 5 and 6,
as defined in ASTM D396-10 (incorporated by reference, see Sec.
63.14(b)).
    Responsible official means responsible official as defined in Sec.
70.2.
    Shutdown means the period that begins when a unit last operates at
25 percent load and ending with a state of no fuel combustion in the
unit.
    Sloped grate means a unit where the solid fuel is fed to the top of
the grate from where it slides downwards; while sliding the fuel first
dries and then ignites and burns. The ash is deposited at the bottom of
the grate. Fluidized bed, dutch oven, pile burner, hybrid suspension
grate, suspension burners, and fuel cells are not considered to be a
sloped grate design.
    Solid fossil fuel includes, but is not limited to, coal, coke,
petroleum coke, and tire derived fuel.
    Solid fuel means any solid fossil fuel or biomass or bio-based
solid fuel.
    Startup means the period between the state of no combustion in the
unit to the period where the unit first achieves 25 percent load (i.e.,
a cold start).
    Steam output means:
    (1) For a boiler that produces steam for process or heating only
(no power generation), the energy content in terms of MMBtu of the
boiler steam output;
    (2) For a boiler that cogenerates process steam and electricity
(also known as combined heat and power), the total energy output, which
is the sum of the energy content of the steam exiting the turbine and
sent to process in MMBtu and the energy of the electricity generated
converted to MMBtu at a rate of 10,000 Btu per kilowatt-hour generated
(10 MMBtu per megawatt-hour) and
    (3) For a boiler that generates only electricity, the alternate
output-based emission limits would be calculated using Equations 16
through 20 of this section, as appropriate:
    (i) For emission limits for boilers in the solid fuel subcategory
use Equation 16 of this section:

[GRAPHIC] [TIFF OMITTED] TP23DE11.046

Where:

ELOBE = Emission limit in units of pounds per megawatt-
hour.
ELT = Appropriate emission limit from Table 1 or 2 of
this subpart in units of pounds per million Btu heat input.

    (ii) For PM and CO emission limits for boilers in one of the
subcategories of units designed to burn coal use Equation 17 of this
section:

[GRAPHIC] [TIFF OMITTED] TP23DE11.047

Where:

ELOBE = Emission limit in units of pounds per megawatt-
hour.
ELT = Appropriate emission limit from Table 1 or 2 of
this subpart in units of pounds per million Btu heat input.

    (iii) For PM and CO emission limits for boilers in one of the
subcategories of units designed to burn biomass use Equation 18 of this
section:

[GRAPHIC] [TIFF OMITTED] TP23DE11.048

Where:

ELOBE = Emission limit in units of pounds per megawatt-
hour.
ELT = Appropriate emission limit from Table 1 or 2 of
this subpart in units of pounds per million Btu heat input.

    (iv) For emission limits for boilers in the one of the
subcategories of units designed to burn liquid fuels use Equation 19 of
this section:

[GRAPHIC] [TIFF OMITTED] TP23DE11.049

Where:

ELOBE = Emission limit in units of pounds per megawatt-hour.
ELT = Appropriate emission limit from Table 1 or 2 of this subpart
in units of pounds per million Btu heat input.

    (v) For emission limits for boilers in the Gas 2 subcategory use
Equation 20 of this section:

[GRAPHIC] [TIFF OMITTED] TP23DE11.050

Where:

ELOBE = Emission limit in units of pounds per megawatt-
hour.
ELT = Appropriate emission limit from Table 1 or 2 of
this subpart in units of pounds per million Btu heat input.

    Stoker means a unit consisting of a mechanically operated fuel
feeding mechanism, a stationary or moving grate to support the burning
of fuel and admit under-grate air to the fuel, an overfire air system
to complete combustion, and an ash discharge system. This definition of
stoker includes air swept stokers. There are two general types of
stokers: underfeed and overfeed. Overfeed stokers include mass feed and
spreader stokers. Fluidized bed, dutch oven, pile burner, hybrid
suspension grate, suspension burners, and fuel cells are not considered
to be a stoker design.
    Stoker/sloped grate/other unit designed to burn kiln dried biomass
means the unit is in the units designed to burn biomass/bio-based solid
subcategory that is either a stoker, sloped grate, or other combustor
design and is not in the stoker/sloped grate/other units designed to
burn wet biomass subcategory.
    Stoker/sloped grate/other unit designed to burn wet biomass means
the unit is in the units designed to burn biomass/bio-based solid
subcategory that is either a stoker, sloped grate, or other combustor
design and any of the biomass/bio-based solid fuel combusted in the
unit exceeds 20 percent moisture.
    Suspension burner means a unit designed to feed the fuel by means
of fuel distributors. The distributors inject air at the point where
the fuel is introduced into the boiler in order to spread the fuel
material over the boiler width. The drying (and much of the combustion)
occurs while the material is suspended in air. The combustion of the
fuel material is completed on a grate or floor below. Suspension
boilers almost universally are designed to have high heat release rates
to dry quickly the wet fuel as it is blown into the boilers. Fluidized
bed, dutch oven, pile burner, and hybrid suspension grate units are not
part of the suspension burner subcategory.
    Temporary boiler means any gaseous or liquid fuel boiler that is
designed to, and is capable of, being carried or moved from one
location to another by means of, for example, wheels, skids, carrying
handles, dollies, trailers, or platforms. A boiler is not a temporary
boiler if any one of the following conditions exists:
    (1) The equipment is attached to a foundation.
    (2) The boiler or a replacement remains at a location for more than
12 consecutive months. Any temporary boiler that replaces a temporary
boiler at a location and performs the same or similar function will be
included in calculating the consecutive time period.
    (3) The equipment is located at a seasonal facility and operates
during the full annual operating period of the seasonal facility,
remains at the facility for at least 2 years, and operates at that
facility for at least 3 months each year.
    (4) The equipment is moved from one location to another in an
attempt to circumvent the residence time requirements of this
definition.
    Total selected metals means the combination of the following
metallic hazardous air pollutants: arsenic, beryllium, cadmium,
chromium, lead, manganese, nickel and selenium.
    Tune-up means adjustments made to a boiler in accordance with
procedures supplied by the manufacturer (or an approved specialist) to
optimize the combustion efficiency.
    Unit designed to burn biomass/bio-based solid subcategory includes
any boiler or process heater that burns at least 10 percent biomass or
bio-based solids on an annual heat input basis in combination with
solid fossil fuels, liquid fuels, or gaseous fuels.
    Unit designed to burn coal/solid fossil fuel subcategory includes
any boiler or process heater that burns any coal or other solid fossil
fuel alone or at least 10 percent coal or other solid fossil fuel on an
annual heat input basis in combination with liquid fuels, gaseous
fuels, or less than 10 percent biomass and bio-based solids on an
annual heat input basis.
    Unit designed to burn gas 1 subcategory includes any boiler or
process heater that burns only natural gas, refinery gas, and/or other
gas 1 fuels; with the exception of liquid fuels burned for periodic
testing not to exceed a combined total of 48 hours during any calendar
year, or during periods of gas curtailment and gas supply emergencies.
    Unit designed to burn gas 2 (other) subcategory includes any boiler
or process heater that is not in the unit designed to burn gas 1
subcategory and burns any gaseous fuels either alone or in combination
with less than 10 percent coal/solid fossil fuel, less than 10 percent
biomass/bio-based solid fuel, and less than 10 percent liquid fuels on
an annual heat input basis.
    Unit designed to burn heavy liquid subcategory means a unit in the
unit designed to burn liquid subcategory where at least 10 percent of
the heat input from liquid fuels on an annual heat input basis comes
from heavy liquids.
    Unit designed to burn light liquid subcategory means a unit in the
unit designed to burn liquid subcategory that is not part of the unit
designed to burn heavy liquid subcategory.
    Unit designed to burn liquid subcategory includes any boiler or
process heater that burns any liquid fuel, but less than 10 percent
coal/solid fossil fuel and less than 10 percent biomass/bio-based solid
fuel on an annual heat input basis, either alone or in combination with
gaseous fuels. Gaseous fuel boilers and process heaters that burn
liquid fuel for periodic testing of liquid fuel, maintenance, or
operator training, not to exceed a combined total of 48 hours during
any calendar year or during periods of maintenance, operator training,
or testing of liquid fuel, not to exceed a combined total of 48 hours
during any calendar year are not included in this definition. Gaseous
fuel boilers and process heaters that burn liquid fuel during periods
of gas curtailment or gas supply emergencies of any duration are also
not included in this definition.
    Unit designed to burn liquid fuel that is a non-continental unit
means an industrial, commercial, or institutional boiler or process
heater designed to burn liquid fuel located in the State of Hawaii, the
Virgin Islands, Guam, American Samoa, the Commonwealth of Puerto Rico,
or the Northern Mariana Islands.
    Unit designed to burn solid fuel subcategory means any boiler or
process heater that burns only solid fuels or at least 10 percent solid
fuel on an annual heat input basis in combination with liquid fuels or
gaseous fuels.
    Vegetable oil means oils extracted from vegetation.
    Voluntary Consensus Standards or VCS mean technical standards
(e.g., materials specifications, test methods, sampling procedures,
business practices) developed or adopted by one or more voluntary
consensus bodies. EPA/Office of Air Quality Planning and Standards, by
precedent, has only used VCS that are written in English. Examples of
VCS bodies are: American Society of Testing and Materials (ASTM 100
Barr Harbor Drive, P.O. Box CB700, West Conshohocken, Pennsylvania
19428-B2959,<PHONE_NUMBER>, http://www.astm.org), American Society of
Mechanical Engineers (ASME ASME, Three Park Avenue, New York, NY 10016-
5990,<PHONE_NUMBER>, http://www.asme.org), International Standards
Organization (ISO 1, ch. de la Voie-Creuse, Case postale 56, CH-1211
Geneva 20, Switzerland, +41 22 749 01 11, http://www.iso.org/iso/home.htm), Standards Australia (AS Level 10, The

Exchange Centre, 20 Bridge Street, Sydney, GPO Box 476, Sydney NSW
2001, + 61 2 9237 6171 http://www.stadards.org.au), British Standards
Institution (BSI, 389 Chiswick High Road, London, W4 4AL, United
Kingdom, +44 (0)20 8996 9001, http://www.bsigroup.com), Canadian
Standards Association (CSA 5060 Spectrum Way, Suite 100, Mississauga,
Ontario L4W 5N6, Canada,<PHONE_NUMBER>, http://www.csa.ca), European
Committee for Standardization (CEN CENELEC Management Centre Avenue
Marnix 17 B-1000 Brussels, Belgium +32 2 550 08 11, http://www.cen.eu/cen), and German Engineering Standards (VDI VDI Guidelines Department,
P.O. Box 10 11 39 40002, Duesseldorf, Germany, +49 211 6214-230, http://www.vdi.eu). The types of standards that are not considered VCS are
standards developed by: the United States, e.g., California (CARB) and
Texas (TCEQ); industry groups, such as American Petroleum Institute
(API), Gas Processors Association (GPA), and Gas Research Institute
(GRI); and other branches of the U.S. government, e.g., Department of
Defense (DOD) and Department of Transportation (DOT). This does not
preclude EPA from using standards developed by groups that are not VCS
bodies within their rule. When this occurs, EPA has done searches and
reviews for VCS equivalent to these non-EPA methods.
    Waste heat boiler means a device that recovers normally unused
energy and converts it to usable heat. Waste heat boilers are also
referred to as heat recovery steam generators. This definition includes
both fired and unfired waste heat boilers.
    Waste heat process heater means an enclosed device that recovers
normally unused energy and converts it to usable heat. Waste heat
process heaters are also referred to as recuperative process heaters.
This definition includes both fired and unfired waste heat process
heaters.
    Wet scrubber means any add-on air pollution control device that
mixes an aqueous stream or slurry with the exhaust gases from a boiler
or process heater to control emissions of particulate matter or to
absorb and neutralize acid gases, such as hydrogen chloride. A wet
scrubber creates an aqueous stream or slurry as a byproduct of the
emissions control process.
    Work practice standard means any design, equipment, work practice,
or operational standard, or combination thereof, that is promulgated
pursuant to section 112(h) of the Clean Air Act.

Tables to Subpart DDDDD of Part 63

    As stated in Sec.  63.7500, you must comply with the following
applicable emission limits:

    Table 1 to Subpart DDDDD of Part 63--Emission Limits for New or Reconstructed Boilers and Process Heaters
                     [Units with heat input capacity of 10 million Btu per hour or greater]
----------------------------------------------------------------------------------------------------------------
                                                      The emissions must
                                                        not exceed the     Or the emissions
If your boiler or process heater                      following emission    must not exceed       Using this
  is in this subcategory . . .     For the following    limits, except       the following    specified sampling
                                   pollutants . . .    during periods of  alternative output- volume or test run
                                                          startup and     based limits . . .    duration . . .
                                                        shutdown . . .
----------------------------------------------------------------------------------------------------------------
1. Units in all subcategories     a. Hydrogen         0.022 lb per MMBtu  0.025 lb per MMBtu  For M26A, collect
 designed to burn solid fuel.      Chloride.           of heat input.      of steam output     a minimum of 1
                                                                           or 0.28 lb per      dscm per run; for
                                                                           MWh.                M26 collect a
                                                                                minimum of 120
                                                                                liters per run
                                  b. Mercury........  8.60E-07 lb per     9.4E-07 lb per      For M29, collect a
                                                       MMBtu of heat       MMBtu of steam      minimum of 4 dscm
                                                       input.              output or 1.1 E-    per run; for M30A
                                                                           05 lb per MWh.      or M30B, collect
                                                                                a minimum sample
                                                                                as specified in
                                                                                the method; for
                                                                                ASTM D6784 \b\
                                                                                collect a minimum
                                                                                of 4 dscm.
2. Pulverized coal boilers        a. Carbon monoxide  9 ppm by volume on  0.0074 lb per       1 hr minimum
 designed to burn coal/solid       (CO) (or CEMS).     a dry basis         MMBtu of steam      sampling time,
 fossil fuel.                                          corrected to 3      output or 0.092     use a span value
                                                       percent oxygen, 3-  lb per MWh; 3-run   of 20 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (28 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.0013 lb per       0.0013 lb per       Collect a minimum
                                   Particulate         MMBtu of heat       MMBtu of steam      of 3 dscm per
                                   Matter (or Total    input; or (2.8E-    output or 0.016     run.
                                   Selected Metals).   05 \a\ lb per       lb per MWh; or
                                                       MMBtu of heat       (2.8E-05 \a\ lb
                                                       input).             per MMBtu of
                                                                           steam output or
                                                                           3.5E-04 \a\ lb
                                                                           per MWh).
3. Stokers designed to burn coal/ a. CO (or CEMS)...  19 ppm by volume    0.017 lb per MMBtu  1 hr minimum
 solid fossil fuel.                                    on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 0.20 lb per      use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 30 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (34 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).

                                  b. Filterable       0.028 lb per MMBtu  0.028 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 2 dscm per
                                   Matter (or Total    (2.2E-05 \a\ lb     or 0.35 lb per      run.
                                   Selected Metals).   per MMBtu of heat   MWh; or (3.0E-05
                                                       input).             \a\ lb per MMBtu
                                                                           of steam output
                                                                           or 2.7E-04 \a\ lb
                                                                           per MWh).
4. Fluidized bed units designed   a. CO (or CEMS)...  17 ppm by volume    0.015 lb per MMBtu  1 hr minimum
 to burn coal/solid fossil fuel.                       on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 0.18 lb per      use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 40 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (59 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.0011 lb per       0.0012 lb per       Collect a minimum
                                   Particulate         MMBtu of heat       MMBtu of steam      of 4 dscm per
                                   Matter (or Total    input; or (1.7E-    output or 0.014     run.
                                   Selected Metals).   05 \a\ lb per       lb per MWh; or
                                                       MMBtu of heat       (1.8E-05 \a\ lb
                                                       input).             per MMBtu of
                                                                           steam output or
                                                                           2.1E-04 \a\ lb
                                                                           per MWh).
5. Stokers/sloped grate/others    a. CO (or CEMS)...  590 ppm by volume   0.56 lb per MMBtu   1 hr minimum
 designed to burn wet biomass                          on a dry basis      of steam output     sampling time,
 fuel.                                                 corrected to 3      or 6.5 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 600 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (410 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.029 lb per MMBtu  0.034 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 2 dscm per
                                   Matter (or Total    (2.6E-05 lb per     or 0.41 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (2.7E-05
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           3.7E-04 lb per
                                                                           MWh).
6. Stokers/sloped grate/others    a. CO.............  250 ppm by volume   0.23 lb per MMBtu   1 hr minimum
 designed to burn kiln-dried                           on a dry basis      of steam output     sampling time,
 biomass fuel.                                         corrected to 3      or 2.8 lb per MWh.  use a span value
                                                       percent oxygen.                         of 400 ppmv for
                                                                                Method 10.
                                  b. Filterable       0.32 lb per MMBtu   0.37 lb per MMBtu   Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 2 dscm per
                                   Matter (or Total    (4.0E-03 lb per     or 4.5 lb per       run.
                                   Selected Metals).   MMBtu of heat       MWh; or (4.2E-03
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.056 lb per MWh).
7. Fluidized bed units designed   a. CO (or CEMS)...  230 ppm by volume   0.22 lb per MMBtu   1 hr minimum
 to burn biomass/bio-based                             on a dry basis      of steam output     sampling time,
 solids.                                               corrected to 3      or 2.6 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 400 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (180 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.0098 lb per       0.012 lb per MMBtu  Collect a minimum
                                   Particulate         MMBtu of heat       of steam output     of 3 dscm per
                                   Matter (or Total    input; or (4.2E-    or 0.14 lb per      run.
                                   Selected Metals).   05 \a\ lb per       MWh; or (5.4E-05
                                                       MMBtu of heat       \a\ lb per MMBtu
                                                       input).             of steam output
                                                                           or 5.9E-04 \a\ lb
                                                                           per MWh).

8. Suspension burners designed    a. CO (or CEMS)...  58 ppm by volume    0.046 lb per MMBtu  1 hr minimum
 to burn biomass/bio-based                             on a dry basis      of steam output     sampling time,
 solids.                                               corrected to 3      or 0.64 lb per      use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 100 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (1,400 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.051 lb per MMBtu  0.052 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (1.1E-03 lb per     or 0.71 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (0.0012
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.016 lb per MWh).
9. Dutch Ovens/Pile burners       a. CO (or CEMS)...  810 ppm by volume   0.89 lb per MMBtu   1 hr minimum
 designed to burn biomass/bio-                         on a dry basis      of steam output     sampling time,
 based solids.                                         corrected to 3      or 8.9 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 1000 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (440 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.036 lb per MMBtu  0.050 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (4.1E-05 lb per     or 0.51 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (5.5E-05
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           5.8E-04 lb per
                                                                           MWh).
10. Fuel cell units designed to   a. CO.............  210 ppm by volume   0.29 lb per MMBtu   1 hr minimum
 burn biomass/bio-based solids.                        on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 2.3 lb per MWh.  use a span value
                                                       percent oxygen.                         of 500 ppmv for
                                                                                Method 10.
                                  b. Filterable       0.011 lb per MMBtu  0.030 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (4.9E-05 \a\ lb     or 0.16 lb per      run.
                                   Selected Metals).   per MMBtu of heat   MWh; or (8.6E-05
                                                       input).             \a\ lb per MMBtu
                                                                           of steam output
                                                                           or 6.9E-04 \a\ lb
                                                                           per MWh).
11. Hybrid suspension grate       a. CO (or CEMS)...  1,500 ppm by        1.80 lb per MMBtu   1 hr minimum
 boiler designed to burn biomass/                      volume on a dry     of steam output     sampling time,
 bio-based solids.                                     basis corrected     or 17 lb per MWh;   use a span value
                                                       to 3 percent        3-run average.      of 3000 ppmv for
                                                       oxygen, 3-run                           Method 10.
                                                       average; or (730
                                                       ppm by volume on
                                                       a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.026 lb per MMBtu  0.033 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 3 dscm per
                                   Matter (or Total    (4.9E-04 \a\ lb     or 0.37 lb per      run.
                                   Selected Metals).   per MMBtu of heat   MWh; or (6.2E-04
                                                       input).             \a\ lb per MMBtu
                                                                           of steam output
                                                                           or 6.9E-03 \a\ lb
                                                                           per MWh).
12. Units designed to burn        a. Hydrogen         0.0012 lb per       0.0013 lb per       For M26A: Collect
 liquid fuel.                      Chloride.           MMBtu of heat       MMBtu of steam      a minimum of 1
                                                       input.              output or 0.017     dscm per run; for
                                                                           lb per MWh.         M26, collect a
                                                                                minimum of 120
                                                                                liters per run.
                                  b. Mercury........  4.9E-07 \a\ lb per  5.4E-07 \a\ lb per  For M29, collect a
                                                       MMBtu of heat       MMBtu of steam      minimum of 4 dscm
                                                       input.              output or 6.8E-06   per run; for M30A
                                                                           \a\ lb per MWh.     or M30B, collect
                                                                                a minimum sample
                                                                                as specified in
                                                                                the method; for
                                                                                ASTM D6784 \b\
                                                                                collect a minimum
                                                                                of 4 dscm.

13. Units designed to burn heavy  a. CO (or CEMS)...  10 ppm by volume    0.0091 lb per       1 hr minimum
 liquid fuel.                                          on a dry basis      MMBtu of steam      sampling time,
                                                       corrected to 3      output or 0.11 lb   use a span value
                                                       percent oxygen, 3-  per MWh; 3-run      of 30 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (18 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.013 lb per MMBtu  0.015 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input.      of steam output     of 2 dscm per
                                   Matter.                                 or 0.18 lb per      run.
                                                                           MWh.
14. Units designed to burn light  a. CO (or CEMS)...  3 ppm by volume on  0.0031 lb per       1 hr minimum
 liquid fuel.                                          a dry basis         MMBtu of steam      sampling time,
                                                       corrected to 3      output or 0.033     use a span value
                                                       percent oxygen;     lb per MWh.         of 10 ppmv for
                                                       or (60 ppm by                           Method 10.
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 1-day
                                                       block average).
                                  b. Filterable       0.0011 \a\ lb per   0.0015 \a\ lb per   Collect a minimum
                                   Particulate         MMBtu of heat       MMBtu of steam      of 3 dscm per
                                   Matter.             input for light     output or 0.016     run.
                                                       liquid.             lb per MWh.
15. Units designed to burn        a. CO.............  18 ppm by volume    0.017 lb per MMBtu  1 hr minimum
 liquid fuel located in non-                           on a dry basis      of steam output     sampling time,
 continental states and                                corrected to 3      or 0.20 lb per      use a span value
 territories.                                          percent oxygen, 3-  MWh; 3-run          of 40 ppmv for
                                                       run average based   average.            Method 10.
                                                       on stack test (91
                                                       ppm by volume on
                                                       a dry basis
                                                       corrected to 3
                                                       percent oxygen, 3-
                                                       hour rolling
                                                       average based on
                                                       CEM).
                                  b. Filterable       0.0080 lb per       0.0087 lb per       Collect a minimum
                                   Particulate         MMBtu of heat       MMBtu of steam      of 4 dscm per
                                   Matter.             input.              output or 0.11 lb   run.
                                                                           per MWh.
16. Units designed to burn gas 2  a. CO.............  4 ppm by volume on  0.005 lb per MMBtu  1 hr minimum
 (other) gases.                                        a dry basis         of steam output     sampling time,
                                                       corrected to 3      or 0.031 lb per     use a span value
                                                       percent oxygen.     MWh.                of 10 ppmv for
                                                                                Method 10.
                                  b. Hydrogen         0.0017 lb per       0.0029 lb per       For M26A, Collect
                                   Chloride.           MMBtu of heat       MMBtu of steam      a minimum of 1
                                                       input.              output or 0.018     dscm per run; for
                                                                           lb per MWh.         M26, collect a
                                                                                minimum of 120
                                                                                liters per run.
                                  c. Mercury........  7.9E-06 lb per      1.4E-05 lb per      For M29, collect a
                                                       MMBtu of heat       MMBtu of steam      minimum of 3 dscm
                                                       input.              output or 8.3E-05   per run; for M30A
                                                                           lb per MWh.         or M30B, collect
                                                                                a minimum sample
                                                                                as specified in
                                                                                the method; for
                                                                                ASTM D6784 \b\
                                                                                collect a minimum
                                                                                of 3 dscm.
                                  d. Filterable       0.0067 lb per       0.012 lb per MMBtu  Collect a minimum
                                   Particulate         MMBtu of heat       of steam output     of 1 dscm per
                                   Matter (or Total    input; or (2.4E-    or 0.070 lb per     run.
                                   Selected Metals).   04 lb per MMBtu     MWh; or (4.0E-04
                                                       of heat input).     lb per MMBtu of
                                                                           steam output or
                                                                           0.0025 lb per
                                                                           MWh).
----------------------------------------------------------------------------------------------------------------
\a\ If you are conducting stack tests to demonstrate compliance and your performance tests for this pollutant
  for at least 2 consecutive years show that your emissions are at or below this limit, you can skip testing
  according to Sec.   63.7515 if all of the other provision of Sec.   63.7515 are met. For all other pollutants
  that do not contain a footnote ``a'', your performance tests for this pollutant for at least 2 consecutive
  years must show that your emissions are at or 75 percent of this limit in order to qualify for skip testing.
\b\ Incorporated by reference, see Sec.   63.14.

    As stated in Sec.  63.7500, you must comply with the following
applicable emission limits:

         Table 2--to Subpart DDDDD of Part 63--Emission Limits for Existing Boilers and Process Heaters
                     [Units with heat input capacity of 10 million Btu per hour or greater]
----------------------------------------------------------------------------------------------------------------
                                                      The emissions must
                                                        not exceed the    The emissions must
If your boiler or process heater                      following emission    not exceed the        Using this
  is in this subcategory . . .     For the following    limits, except         following      specified sampling
                                   pollutants . . .    during periods of  alternative output- volume or test run
                                                          startup and     based limits . . .    duration . . .
                                                        shutdown . . .
----------------------------------------------------------------------------------------------------------------
1. Units in all subcategories     a. Hydrogen         0.022 lb per MMBtu  0.025 lb per MMBtu  For M26A, Collect
 designed to burn solid fuel.      Chloride.           of heat input.      of steam output     a minimum of 1
                                                                           or 0.28 lb per      dscm per run; for
                                                                           MWh.                M26, collect a
                                                                                minimum of 120
                                                                                liters per run.
                                  b. Mercury........  3.1E-06 lb per      3.5E-06 lb per      For M29, collect a
                                                       MMBtu of heat       MMBtu of steam      minimum of 3 dscm
                                                       input.              output or 4.0E-05   per run; for M30A
                                                                           lb per MWh.         or M30B, collect
                                                                                a minimum sample
                                                                                as specified in
                                                                                the method; for
                                                                                ASTM D6784 \b\
                                                                                collect a minimum
                                                                                of 3 dscm.
2. Pulverized coal boilers        a. CO (or CEMS)...  41 ppm by volume    0.035 lb per MMBtu  1 hr minimum
 designed to burn coal/solid                           on a dry basis      of steam output     sampling time,
 fossil fuel.                                          corrected to 3      or 0.42 lb per      use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 100 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (28 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.044 lb per MMBtu  0.045 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (5.9E-05 lb per     or 0.54 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (6.0E-05
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           7.3E-04 lb per
                                                                           MWh).
3. Stokers designed to burn coal/ a. CO (or CEMS)...  220 ppm by volume   0.20 lb per MMBtu   1 hr minimum
 solid fossil fuel.                                    on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 2.3 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 400 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (34 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.028 lb per MMBtu  0.030 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 2 dscm per
                                   Matter (or Total    (8.3E-05 lb per     or 0.35 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (8.8E-05
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.0011 lb per
                                                                           MWh).
4. Fluidized bed units designed   a. CO (or CEMS)...  56 ppm by volume    0.049 lb per MMBtu  1 hr minimum
 to burn coal/solid fossil fuel.                       on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 0.57 lb per      use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 100 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (59 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.088 lb per MMBtu  0.092 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (1.7E-05 lb per     or 1.1 lb per       run.
                                   Selected Metals).   MMBtu of heat       MWh; or (1.8E-05
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           2.1E-04 lb per
                                                                           MWh).

5. Stokers/sloped grate/others    a. CO (or CEMS)...  790 ppm by volume   0.72 lb per MMBtu   1 hr minimum
 designed to burn wet biomass                          on a dry basis      of steam output     sampling time,
 fuel.                                                 corrected to 3      or 8.7 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 1000 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (410 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.029 lb per MMBtu  0.034 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 2 dscm per
                                   Matter (or Total    (5.7E-05 lb per     or 0.41 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (6.6E-05
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           8.0E-04 lb per
                                                                           MWh).
6. Stokers/sloped grate/others    a. CO.............  250 ppm by volume   0.23 lb per MMBtu   1 hr minimum
 designed to burn kiln-dried                           on a dry basis      of steam output     sampling time,
 biomass fuel.                                         corrected to 3      or 2.8 lb per MWh.  use a span value
                                                       percent oxygen.                         of 500 ppmv for
                                                                                Method 10.
                                  b. Filterable       0.32 lb per MMBtu   0.37 lb per MMBtu   Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (4.0E-03 lb per     or 4.5 lb per       run.
                                   Selected Metals).   MMBtu of heat       MWh; or (0.0046
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.056 lb per MWh).
7. Fluidized bed units designed   a. CO (or CEMS)...  370 ppm by volume   0.36 lb per MMBtu   1 hr minimum
 to burn biomass/bio-based solid.                      on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 4.1 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 500 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (180 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.11 lb per MMBtu   0.14 lb per MMBtu   Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (0.0012 lb per      or 1.6 lb per       run.
                                   Selected Metals).   MMBtu of heat       MWh; or (0.0015
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.017 lb per MWh).
8. Suspension burners designed    a. CO (or CEMS)...  58 ppm by volume    0.046 lb per MMBtu  1 hr minimum
 to burn biomass/bio-based solid.                      on a dry basis      of steam output     sampling time,
                                                       corrected to 3      or 0.64 lb per      use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 100ppmv for
                                                       run average; or     average.            Method 10.
                                                       (1,400 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).
                                  b. Filterable       0.051 lb per MMBtu  0.052 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (0.0011 lb per      or 0.71 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (0.0012
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.016 lb per MWh).
9. Dutch Ovens/Pile burners       a. CO (or CEMS)...  810 ppm by volume   0.89 lb per MMBtu   1 hr minimum
 designed to burn biomass/bio-                         on a dry basis      of steam output     sampling time,
 based solid.                                          corrected to 3      or 8.9 lb per       use a span value
                                                       percent oxygen, 3-  MWh; 3-run          of 1000 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (440 ppm by
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 10-day
                                                       rolling average).

                                  b. Filterable       0.036 lb per MMBtu  0.050 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (2.4E-04 lb per     or 0.51 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (3.4E-04
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           0.0034 lb per
                                                                           MWh).
10. Fuel cell units designed to   a. CO.............  1,500 ppm by        3.2 lb per MMBtu    1 hr minimum
 burn biomass/bio-based solid.                         volume on a dry     of steam output     sampling time,
                                                       basis corrected     or 17 lb per MWh.   use a span value
                                                       to 3 percent                            of 2000 ppmv for
                                                       oxygen.                                 Method 10.
                                  b. Filterable       0.033 lb per MMBtu  0.090 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (4.9E-05 lb per     or 0.46 lb per      run.
                                   Selected Metals).   MMBtu of heat       MWh; or (1.4E-04
                                                       input).             lb per MMBtu of
                                                                           steam output or
                                                                           6.9E-04 lb per
                                                                           MWh).
11. Hybrid suspension grate       a. CO (or CEMS)...  3,900 ppm by        3.9 lb per MMBtu    1 hr minimum
 units designed to burn biomass/                       volume on a dry     of steam output     sampling time,
 bio-based solid.                                      basis corrected     or 43 lb per MWh;   use a span value
                                                       to 3 percent        3-run average.      of 5000 ppmv for
                                                       oxygen, 3-run                           Method 10.
                                                       average; or (730
                                                       ppm by volume on
                                                       a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.44 lb per MMBtu   0.55 lb per MMBtu   Collect a minimum
                                   Particulate         of heat input; or   of steam output     of 1 dscm per
                                   Matter (or Total    (4.9E-04\a\ lb      or 6.2 lb per       run.
                                   Selected Metals).   per MMBtu of heat   MWh; or (6.2E-
                                                       input).             04\a\ lb per
                                                                           MMBtu of steam
                                                                           output or 6.9E-
                                                                           03\a\ lb per MWh).
12. Units designed to burn        a. Hydrogen         0.0012 lb per       0.0015 lb per       For M26A, collect
 liquid fuel.                      Chloride.           MMBtu of heat       MMBtu of steam      a minimum of 1
                                                       input.              output or 0.017     dscm per run; for
                                                                           lb per MWh.         M26, collect a
                                                                                minimum of 120
                                                                                liters per run.
                                  b. Mercury........  2.6E-05 lb per      3.3E-05 lb per      For M29, collect a
                                                       MMBtu of heat       MMBtu of steam      minimum of 2 dscm
                                                       input.              output or 3.6E-04   per run; for M30A
                                                                           lb per MWh.         or M30B collect a
                                                                                minimum sample as
                                                                                specified in the
                                                                                method, for ASTM
                                                                                D6784\b\ collect
                                                                                a minimum of 2
                                                                                dscm.
13. Units designed to burn heavy  a. CO (or CEMS)...  10 ppm by volume    0.0091 lb per       1 hr minimum
 liquid fuel.                                          on a dry basis      MMBtu of steam      sampling time,
                                                       corrected to 3      output or 0.11 lb   use a span value
                                                       percent oxygen, 3-  per MWh; 3-run      of 20 ppmv for
                                                       run average; or     average.            Method 10.
                                                       (18 ppm by volume
                                                       on a dry basis
                                                       corrected to 3
                                                       percent oxygen,
                                                       10-day rolling
                                                       average).
                                  b. Filterable       0.062 lb per MMBtu  0.075 lb per MMBtu  Collect a minimum
                                   Particulate         of heat input.      of steam output     of 1 dscm per
                                   Matter.                                 or 0.86 lb per      run.
                                                                           MWh.
14. Units designed to burn light  a. CO (or CEMS)...  7 ppm by volume on  0.0071 lb per       1 hr minimum
 liquid fuel.                                          a dry basis         MMBtu of steam      sampling time,
                                                       corrected to 3      output or 0.076     use a span value
                                                       percent oxygen;     lb per MWh.         of 10 ppmv for
                                                       or (60 ppm by                           Method 10.
                                                       volume on a dry
                                                       basis corrected
                                                       to 3 percent
                                                       oxygen, 1-day
                                                       block average).
                                  b. Filterable       0.0034 lb per       0.0045 lb per       Collect a minimum
                                   Particulate         MMBtu of heat       MMBtu of steam      of 3 dscm per
                                   Matter.             input.              output or 0.047     run.
                                                                           lb per MWh.

15. Units designed to burn        a. CO (or CEMS)...  18 ppm by volume    0.017 lb per MMBtu  1 hr minimum
 liquid fuel located in non-                           on a dry basis      of steam output     sampling time,
 continental states and                                corrected to 3      or 0.20 lb per      use a span value
 territories.                                          percent oxygen, 3-  MWh; 3-run          of 40 ppmv for
                                                       run average based   average.            Method 10.
                                                       on stack test (91
                                                       ppm by volume on
                                                       a dry basis
                                                       corrected to 3
                                                       percent oxygen, 3-
                                                       hour rolling
                                                       average based on
                                                       CEM).
                                  b. Filterable       0.0080 lb per       0.0097 lb per       Collect a minimum
                                   Particulate         MMBtu of heat       MMBtu of steam      of 2 dscm per
                                   Matter.             input.              output or 0.11 lb   run.
                                                                           per MWh.
16. Units designed to burn gas 2  a. CO.............  4 ppm by volume on  0.0050 lb per       1 hr minimum
 (other) gases.                                        a dry basis         MMBtu of steam      sampling time,
                                                       corrected to 3      output or 0.031     use a span value
                                                       percent oxygen.     lb per MWh.         of 10 ppmv for
                                                                                Method 10.
                                  b. Hydrogen         0.0017 lb per       0.0029 lb per       For M26A, collect
                                   Chloride.           MMBtu of heat       MMBtu of steam      a minimum of 1
                                                       input.              output or 0.018     dscm per run; for
                                                                           lb per MWh.         M26, collect a
                                                                                minimum of 120
                                                                                liters per run.
                                  c. Mercury........  7.9E-06 lb per      1.4E-05 lb per      For M29, collect a
                                                       MMBtu of heat       MMBtu of steam      minimum of 2 dscm
                                                       input.              output or 8.3E-05   per run; for M30A
                                                                           lb per MWh.         or M30B, collect
                                                                                a minimum sample
                                                                                as specified in
                                                                                the method; for
                                                                                ASTM D6784 \b\
                                                                                collect a minimum
                                                                                of 2 dscm.
                                  d. Filterable       0.0067 lb per       0.012 lb per MMBtu  Collect a minimum
                                   Particulate         MMBtu of heat       of steam output     of 1 dscm per
                                   Matter (or Total    input or (2.4E-04   or 0.070 lb per     run.
                                   Selected Metals).   lb per MMBtu of     MWh; or (4.0E-04
                                                       heat input).        lb per MMBtu of
                                                                           steam output or
                                                                           0.0025 lb per
                                                                           MWh).
----------------------------------------------------------------------------------------------------------------
\a\ If you are conducting stack tests to demonstrate compliance and your performance tests for this pollutant
  for at least 2 consecutive years show that your emissions are at or below this limit, you can skip testing
  according to Sec.   63.7515 if all of the other provisions of Sec.   63.7515 are met. For all other pollutants
  that do not contain a footnote a, your performance tests for this pollutant for at least 2 consecutive years
  must show that your emissions are at or 75 percent of this limit in order to qualify for skip testing.
\b\ Incorporated by reference, see Sec.   63.14.

    As stated in Sec.  63.7500, you must comply with the following
applicable work practice standards:

      Table 3--to Subpart DDDDD of Part 63--Work Practice Standards
------------------------------------------------------------------------
                                         You must meet the following . .
         If your unit is . . .                          .
------------------------------------------------------------------------
1. A new or existing boiler or process   Conduct a tune-up of the boiler
 heater with heat input capacity of       or process heater every 5
 less than 5 million Btu per hour in      years as specified in Sec.
 any of the following subcategories:      63.7540.
 unit designed to burn natural gas,
 refinery gas or other gas 1 fuels;
 unit designed to burn gas 2 (other);
 or unit designed to burn light liquid.
2. A limited use boiler or process       Conduct a tune-up of the boiler
 heater; or a new or existing boiler or   or process heater biennially
 process heater with heat input           as specified in Sec.
 capacity of less than 10 million Btu     63.7540.
 per hour in the unit designed to burn
 heavy liquid or unit designed to burn
 solid fuel subcategories; or a new or
 existing boiler or process heater with
 heat input capacity of less than 10
 million Btu per hour, but equal to or
 greater than 5 million Btu per hour,
 in any of the following subcategories:
 unit designed to burn natural gas,
 refinery gas or other gas 1 fuels;
 unit designed to burn gas 2 (other);
 or unit designed to burn light liquid.

3. A new or existing boiler or process   Conduct a tune-up of the boiler
 heater with heat input capacity of 10    or process heater annually as
 million Btu per hour or greater.         specified in Sec.   63.7540.
                                          Units in either the Gas 1 or
                                          Metal Process Furnace
                                          subcategories will conduct
                                          this tune-up as a work
                                          practice for all regulated
                                          emissions under this subpart.
                                          Units in all other
                                          subcategories will conduct
                                          this tune-up as a work
                                          practice for dioxins/furans.
4. An existing boiler or process heater  Must have a one-time energy
 located at a major source facility.      assessment performed on the
                                          major source facility by
                                          qualified energy assessor. An
                                          energy assessment completed on
                                          or after January 1, 2008, that
                                          meets or is amended to meet
                                          the energy assessment
                                          requirements in this table,
                                          satisfies the energy
                                          assessment requirement. The
                                          energy assessment must
                                          include:
                                         a. A visual inspection of the
                                          boiler or process heater
                                          system.
                                         b. An evaluation of operating
                                          characteristics of the
                                          facility, specifications of
                                          energy using systems,
                                          operating and maintenance
                                          procedures, and unusual
                                          operating constraints.
                                         c. An inventory of major
                                          systems consuming energy from
                                          affected boilers and process
                                          heaters and which are under
                                          the control of the boiler/
                                          process heater owner/operator.
                                         d. A review of available
                                          architectural and engineering
                                          plans, facility operation and
                                          maintenance procedures and
                                          logs, and fuel usage.
                                         e. A review of the facility's
                                          energy management practices
                                          and provide recommendations
                                          for improvements consistent
                                          with the definition of energy
                                          management practices.
                                         f. A list of major energy
                                          conservation measures.
                                         g. A list of the energy savings
                                          potential of the energy
                                          conservation measures
                                          identified.
                                         h. A comprehensive report
                                          detailing the ways to improve
                                          efficiency, the cost of
                                          specific improvements,
                                          benefits, and the time frame
                                          for recouping those
                                          investments.
5. An existing or new unit subject to    You must employ good combustion
 emission limits in Tables 1 or 2 to      practices and demonstrate that
 this subpart.                            good combustion practices are
                                          maintained by monitoring O2
                                          concentrations and optimizing
                                          those concentrations as
                                          specified by the boiler
                                          manufacturer; you must ensure
                                          that boiler operators are
                                          trained in startup and
                                          shutdown procedures, including
                                          maintenance and cleaning,
                                          safety, control device
                                          startup, and procedures to
                                          minimize emissions; and you
                                          must maintain records during
                                          periods of startup and
                                          shutdown and include in your
                                          compliance reports the O2
                                          conditions/data for each
                                          event, length of startup/
                                          shutdown and reason for the
                                          startup/shutdown (i.e., normal/
                                          routine, problem/malfunction,
                                          outage).
------------------------------------------------------------------------

    As stated in Sec.  63.7500, you must comply with the applicable
operating limits:

 Table 4--to Subpart DDDDD of Part 63--Operating Limits for Boilers and
                             Process Heaters
------------------------------------------------------------------------
If you demonstrate compliance   You must meet these operating limits . .
         using . . .                               .
------------------------------------------------------------------------
1. Wet PM scrubber control on  Maintain the 30-day rolling average
 a boiler not using a PM CPMS.  pressure drop and the 30-day rolling
                                average liquid flow rate at or above the
                                lowest one-hour average pressure drop
                                and the lowest one-hour average liquid
                                flow rate, respectively, measured during
                                the most recent performance test
                                demonstrating compliance with the PM
                                emission limitation according to Sec.
                                63.7530(b) and Table 7 to this subpart.
2. Wet acid gas (HCl)          Maintain the 30-day rolling average
 scrubber control on a boiler   effluent pH at or above the lowest one-
 not using a hydrogen           hour average pH and the 30-day rolling
 chloride CEMS.                 average liquid flow rate at or above the
                                lowest one-hour average liquid flow rate
                                measured during the most recent
                                performance test demonstrating
                                compliance with the HCl emission
                                limitation according to Sec.
                                63.7530(b) and Table 7 to this subpart.
3. Fabric filter control on    a. Maintain opacity to less than or equal
 units not using a PM CPMS.     to 10 percent opacity (daily block
                                average); or
                               b. Install and operate a bag leak
                                detection system according to Sec.
                                63.7525 and operate the fabric filter
                                such that the bag leak detection system
                                alarm does not sound more than 5 percent
                                of the operating time during each 6-
                                month period.
4. Electrostatic precipitator  a. This option is for boilers and process
 control on units not using a   heaters that operate dry control systems
 PM CPMS.                       (i.e., an ESP without a wet scrubber).
                                Existing and new boilers and process
                                heaters must maintain opacity to less
                                than or equal to 10 percent opacity
                                (daily block average); or
                               b. This option is only for boilers and
                                process heaters not subject to PM CPMS
                                or continuous compliance with an opacity
                                limit (i.e., COMS). Maintain the 30-day
                                rolling average total secondary electric
                                power input of the electrostatic
                                precipitator at or above the operating
                                limits established during the
                                performance test according to Sec.
                                63.7530(b) and Table 7 to this subpart.

5. Dry scrubber or carbon      Maintain the minimum sorbent or carbon
 injection control on a         injection rate as defined in Sec.
 boiler not using a mercury     63.7575 of this subpart.
 CEMS.
6. Any other add-on air        This option is for boilers and process
 pollution control type on      heaters that operate dry control
 units not using a PM CPMS.     systems. Existing and new boilers and
                                process heaters must maintain opacity to
                                less than or equal to 10 percent opacity
                                (daily block average).
7. Fuel analysis.............  Maintain the fuel type or fuel mixture
                                such that the applicable emission rates
                                calculated according to Sec.
                                63.7530(c)(1), (2) and/or (3) is less
                                than the applicable emission limits.
8. Performance testing.......  For boilers and process heaters that
                                demonstrate compliance with a
                                performance test, maintain the operating
                                load of each unit such that it does not
                                exceed 110 percent of the average
                                operating load recorded during the most
                                recent performance test.
9. Oxygen Analyzer System....  For boilers and process heaters subject
                                to a carbon monoxide emission limit that
                                demonstrate compliance with an O2
                                analyzer system as specified in Sec.
                                63.7525(a), maintain the oxygen level
                                such that it is not below the lowest
                                hourly average oxygen concentration
                                measured during the most recent CO
                                performance test.
------------------------------------------------------------------------

    As stated in Sec.  63.7520, you must comply with the following
requirements for performance testing for existing, new or reconstructed
affected sources:

 Table 5--to Subpart DDDDD of Part 63--Performance Testing Requirements
------------------------------------------------------------------------
 To conduct a performance test
 for the following pollutant .    You must . . .        Using . . .
              . .
------------------------------------------------------------------------
1. Particulate Matter.........  a. Select          Method 1 at 40 CFR
                                 sampling ports     part 60, appendix A-
                                 location and the   1 of this chapter.
                                 number of
                                 traverse points.
                                b. Determine       Method 2, 2F, or 2G
                                 velocity and       at 40 CFR part 60,
                                 volumetric flow-   appendix A-1 or A-2
                                 rate of the        to part 60 of this
                                 stack gas.         chapter.
                                c. Determine       Method 3A or 3B at 40
                                 oxygen or carbon   CFR part 60,
                                 dioxide            appendix A-2 to part
                                 concentration of   60 of this chapter,
                                 the stack gas.     or ANSI/ASME PTC
                                                    19.10-1981.\a\
                                d. Measure the     Method 4 at 40 CFR
                                 moisture content   part 60, appendix A-
                                 of the stack gas.  3 of this chapter.
                                e. Measure the     Method 5 or 17
                                 particulate        (positive pressure
                                 matter emission    fabric filters must
                                 concentration.     use Method 5D) at 40
                                                    CFR part 60,
                                                    appendix A-3 or A-6
                                                    of this chapter.
                                f. Convert         Method 19 F-factor
                                 emissions          methodology at 40
                                 concentration to   CFR part 60,
                                 lb per MMBtu       appendix A-7 of this
                                 emission rates.    chapter.
2. Hydrogen chloride..........  a. Select          Method 1 at 40 CFR
                                 sampling ports     part 60, appendix A-
                                 location and the   1 of this chapter.
                                 number of
                                 traverse points.
                                b. Determine       Method 2, 2F, or 2G
                                 velocity and       at 40 CFR part 60,
                                 volumetric flow-   appendix A-2 of this
                                 rate of the        chapter.
                                 stack gas.
                                c. Determine       Method 3A or 3B at 40
                                 oxygen or carbon   CFR part 60,
                                 dioxide            appendix A-2 of this
                                 concentration of   chapter, or ANSI/
                                 the stack gas.     ASME PTC 19.10-
                                                    1981.\a\
                                d. Measure the     Method 4 at 40 CFR
                                 moisture content   part 60, appendix A-
                                 of the stack gas.  3 of this chapter.
                                e. Measure the     Method 26 or 26A (M26
                                 hydrogen           or M26A) at 40 CFR
                                 chloride           part 60, appendix A-
                                 emission           8 of this chapter.
                                 concentration.
                                f. Convert         Method 19 F-factor
                                 emissions          methodology at 40
                                 concentration to   CFR part 60,
                                 lb per MMBtu       appendix A-7 of this
                                 emission rates.    chapter.
3. Mercury....................  a. Select          Method 1 at 40 CFR
                                 sampling ports     part 60, appendix A-
                                 location and the   1 of this chapter.
                                 number of
                                 traverse points.
                                b. Determine       Method 2, 2F, or 2G
                                 velocity and       at 40 CFR part 60,
                                 volumetric flow-   appendix A-1 or A-2
                                 rate of the        of this chapter.
                                 stack gas.
                                c. Determine       Method 3A or 3B at 40
                                 oxygen or carbon   CFR part 60,
                                 dioxide            appendix A-1 of this
                                 concentration of   chapter, or ANSI/
                                 the stack gas.     ASME PTC 19.10-
                                                    1981.\a\
                                d. Measure the     Method 4 at 40 CFR
                                 moisture content   part 60, appendix A-
                                 of the stack gas.  3 of this chapter.
                                e. Measure the     Method 29, 30A, or
                                 mercury emission   30B (M29, M30A, or
                                 concentration.     M30B) at 40 CFR part
                                                    60, appendix A-8 of
                                                    this chapter or
                                                    Method 101A at 40
                                                    CFR part 60,
                                                    appendix B of this
                                                    chapter, or ASTM
                                                    Method D6784.\a\
                                f. Convert         Method 19 F-factor
                                 emissions          methodology at 40
                                 concentration to   CFR part 60,
                                 lb per MMBtu       appendix A-7 of this
                                 emission rates.    chapter.
4. CO.........................  a. Select the      Method 1 at 40 CFR
                                 sampling ports     part 60, appendix A-
                                 location and the   1 of this chapter.
                                 number of
                                 traverse points.
                                b. Determine       Method 3A or 3B at 40
                                 oxygen             CFR part 60,
                                 concentration of   appendix A-3 of this
                                 the stack gas.     chapter, or ASTM
                                                    D6522-00 (Reapproved
                                                    2005), or ANSI/ASME
                                                    PTC 19.10-1981.\a\
                                c. Measure the     Method 4 at 40 CFR
                                 moisture content   part 60, appendix A-
                                 of the stack gas.  3 of this chapter.

                                d. Measure the CO  Method 10 at 40 CFR
                                 emission           part 60, appendix A-
                                 concentration.     4 of this chapter.
                                                    Use a span value of
                                                    2 times the
                                                    concentration of the
                                                    applicable emission
                                                    limit.
------------------------------------------------------------------------
\a\ Incorporated by reference, see Sec.   63.14.

    As stated in Sec.  63.7521, you must comply with the following
requirements for fuel analysis testing for existing, new or
reconstructed affected sources. However, equivalent methods (as defined