10 CSR 10-5.540 - Control of Emissions From Batch Process Operations
PURPOSE: This rulemaking will correct references to
other state and federal rules within this rule to address U.S. Environmental
Protection Agency (EPA) concerns so that it can be approved into the Missouri
State Implementation
PURPOSE: This rule limits the volatile organic
compound (VOC) emissions from batch process operations by incorporating
reasonably available control technology (RACT) in the St. Louis 1997 ozone
nonattainment area as required by the Clean Air
(1) Applicability.
(A) This rule applies throughout the City of
St. Louis and St. Charles, St. Louis, Jefferson, and Franklin
Counties.
(B) This rule applies to
all batch process operations that have the potential to emit one hundred (100)
tons or more per year of volatile organic compounds (VOC) at facilities
identified by any of the following four (4)-digit standard industrial
classification (SIC) codes, as defined in the 1987 edition of the Federal
Standard Industrial Classification Manual, which is hereby incorporated by
reference in this rule, as published by the Executive Office of the President,
Office of Management and Budget. Copies can be obtained from the U.S.
Publishing Office Bookstore, 710 N. Capitol Street N W, Washington, DC 20401.
This rule does not incorporate any subsequent amendments or additions:
1. SIC 2821 Plastics Materials, Synthetic
Resins, and Nonvulcanizable Elastomers;
2. SIC 2833 Medicinal Chemicals and Botanical
Products;
3. SIC 2834
Pharmaceutical Preparations;
4. SIC
2861 Gum and Wood Chemicals;
5. SIC
2865 Cyclic Organic Crudes and Intermediates, and Organic Dyes and
Pigments;
6. SIC 2869 Industrial
Organic Chemicals, Not Elsewhere Classified; or
7. SIC 2879 Pesticides and Agricultural
Chemicals, Not Elsewhere Classified.
(C) The following single unit operations and
batch process trains are exempt from the control requirements of section (3) of
this rule. However, the record keeping and reporting requirements in section
(4) of this rule shall apply to such single unit operations and batch process
trains:
1. Within a batch process operation,
any single unit operation with uncontrolled total annual mass emissions of less
than or equal to five hundred (500) pounds per year (lb/yr) of VOC. These
single unit operations are also excluded from the calculation of the total
annual mass emissions for a batch process train. If the uncontrolled total
annual mass emissions from an exempt single unit operation exceed five hundred
(500) lb/yr of VOC in any subsequent year, the owner or operator shall
calculate applicability in accordance with subsection (1)(E) of this rule for
both the individual single unit operation and the batch process train
containing the single unit operation; and
2. Any batch process train containing process
vents that have, in the aggregate, uncontrolled total annual mass emissions, as
determined in accordance with paragraph (3)(D)1. of this rule, of less than
thirty thousand (30,000) lb/yr of VOC for all products manufactured in that
batch process train.
(D)
The applicability equations in subsection (1)(E) of this rule, which require
the calculation of uncontrolled total annual mass emissions and flow rate
value, shall be used to determine whether a single unit operation or a batch
process train is subject to the control requirements in section (3) of this
rule. The applicability equations apply to the following:
1. Any single unit operation with
uncontrolled total annual mass emissions that exceed five hundred (500) lb/yr
of VOC and a VOC concentration greater than five hundred (500) parts per
million by volume (ppmv). In this individual determination, the applicability
analysis should not be performed for any single unit operation with a VOC
concentration less than or equal to five hundred (500) ppmv; and
2. Any batch process train containing process
vents which, in the aggregate, have uncontrolled total annual mass emissions of
thirty thousand (30,000) lb/yr or more of VOC from all products manufactured in
the batch process train. Any single unit operation with uncontrolled total
annual mass emissions exceeding five hundred (500) lb/yr, regardless of VOC
concentration, shall be included in the aggregate applicability
analysis.
(E)
Applicability Equations. The applicability equations in this rule subsection
are specific to volatility.
1. Weighted
average volatility (WAV) shall be calculated as follows:
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where:
WAV =weighted average volatility;
MVOCi =mass of VOC component i;
MWVOCi =molecular weight of VOC component i; and
VPi =vapor pressure of VOC component i.
2. For purposes of
determining applicability, flow rate values shall be calculated as follows:
A. For low WAV has a vapor pressure less than
or equal to seventy-five (75) millimeters of Mercury (mmHg) at twenty degrees
Celsius (20 °C), and shall use the following equation:
Click to view image
Where:
FR =Vent stream flow rate, expressed as standard cubic feet per minute (scfm);
UTAME =Uncontrolled total annual mass emissions of VOC, expressed as lb/yr;
B.
Moderate WAV has a vapor pressure greater than seventy-five (75) mmHg but less
than or equal to one hundred fifty (150) mmHg at twenty degrees Celsius (20
°C), and shall use the following equation:
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C.
High WAV has a vapor pressure greater than one hundred fifty (150) mmHg at
twenty degrees Celsius (20 °C), and shall use the following equation:
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3. To determine the vapor pressure of VOC,
the applicable methods and procedures in section (5) of this rule shall
apply.
(F) In the event
that other rules in Title 10 Division 10 of the Code of State
Regulations are also applicable to batch process operations, the more
stringent rule shall apply.
(2) Definitions.
(A) Batch-A discontinuous process involving
the bulk movement of material through sequential manufacturing steps, typically
characterized as non-steady-state.
(B) Batch cycle-A manufacturing event of an
intermediate or product from start to finish in a batch process.
(C) Batch process operation-A discontinuous
operation in which a discrete quantity or batch of feed is charged into a
chemical manufacturing process unit and distilled or reacted, or otherwise used
at one time, and may include, but is not limited to, reactors, filters, dryers,
distillation columns, extractors, crystallizers, blend tanks, neutralizer
tanks, digesters, surge tanks and product separators. After each batch process
operation, the equipment is generally emptied before a fresh batch is
started.
(D) Batch process
train-The collection of equipment (e.g., reactors, filters, dryers,
distillation columns, extractors, crystallizers, blend tanks, neutralizer
tanks, digesters, surge tanks and product separators) configured to produce a
product or intermediate by a batch process operation. A batch process train
terminates at the point of storage of the product or intermediate being
produced in the batch process train. Irrespective of the product being
produced, a batch process train which is independent of other processes shall
be considered a single batch process train for purposes of this rule.
(E) Control devices-Air pollution abatement
devices. For purposes of this rule, condensers operating under reflux
conditions are not considered control devices.
(F) Emission events-Discrete venting episodes
that may be associated with a single unit of operation.
(G) Processes-Any equipment within a
contiguous area that are connected together during the course of a year where
connected is defined as a link between equipment, whether it is physical, such
as a pipe, or whether it is next in a series of steps from which material is
transferred from one unit operation to another.
(H) Unit operations-Discrete processing steps
that occur within distinct equipment that are used to prepare reactants,
facilitate reactions, separate and purify products, and recycle
materials.
(I) Vent-A point of
emission from a unit operation. Typical process vents from batch processes
include condenser vents, vacuum pumps, steam ejectors, and atmospheric vents
from reactors and other process vessels. Vents also include relief valve
discharges. Equipment exhaust systems that discharge from unit operations also
would be considered process vents.
(J) Volatile organic compound (VOC)-The
definition for this term can be found in
10 CSR
10-6.020.
(K) Volatility-For purposes of this rule, low
volatility materials are defined as those which have a vapor pressure less than
or equal to seventy-five (75) mmHg at twenty degrees Celsius (20 °C),
moderate volatility materials have a vapor pressure greater than seventy-five
(75) and less than or equal to one hundred fifty (150) mmHg at twenty degrees
Celsius (20 °C), and high volatility materials have a vapor pressure
greater than one hundred fifty (150) mmHg at twenty degrees Celsius (20
°C). To evaluate VOC volatility for single unit operations that service
numerous VOCs or for processes handling multiple VOCs, the weighted average
volatility can be calculated from knowing the total amount of each VOC used in
a year, and the individual component vapor pressure, per the equation in
paragraph (1)(E)1. of this rule.
(3) General Provisions.
(A) Every owner or operator of a single unit
operation with an average flow rate, as determined in accordance with paragraph
(3)(D)2. of this rule, below the flow rate value calculated by the
applicability equations contained in subsection (1)(E) of this rule, shall
reduce uncontrolled VOC emissions from that single unit operation by an overall
efficiency, on an annual average, of at least ninety percent (90%), or twenty
(20) ppmv, per batch cycle.
(B)
Every owner or operator of a batch process train with an average flow rate, as
determined in accordance with subparagraph (3)(D)2.B. of this rule, below the
flow rate value calculated by the applicability equations contained in
subsection (1)(E) of this rule, shall reduce uncontrolled VOC emissions from
that batch process train by an overall efficiency, on an annual average, of at
least ninety percent (90%), or twenty (20) ppmv, per batch cycle. Any control
device meeting the criteria in subsection (3)(C) of this rule is presumed to
have a control efficiency of ninety percent (90%), or twenty (20) ppmv, per
batch cycle, as applicable.
(C)
Control Equipment Specifications.
1. If a
boiler or process heater is used to comply with this rule section, the vent
stream shall be introduced into the flame zone of the boiler or process heater.
The boiler or process heater shall meet the control device requirements for
boilers and process heaters included in
40 CFR
60.703,
60.704,
and
60.705,
as specified in 10 CSR
10-6.070(3)(A) 1.
2. If a flare is used to comply with this
rule section, it shall comply with the requirements of
40 CFR
60.18, as specified in
10 CSR
10-6.070(3)(A) 1. If a process not
subject to this rule vents an emergency relief discharge into a common flare
header and causes the flare servicing the process subject to this rule to
violate any of the provisions of
40 CFR
60.18, the flare will be temporarily exempt
from those provisions. This exemption from flare specification requirements is
only valid during the emergency relief venting discharge.
3. If an afterburner, scrubber, absorber,
condenser, or adsorber is used to comply with this rule section, those
equipment shall meet the control device requirements included in
40 CFR
60.703,
60.704,
and
60.705,
as specified in 10 CSR 10- 6.070(3)(A) 1.
4. If an incinerator is used to comply with
this rule section, the incinerator shall meet the control device requirements
for incinerators included in
40 CFR
60.703,
60.704,
and
60.705,
as specified in 10 CSR
10-6.070(3)(A) 1.
(D) Determination of uncontrolled total
annual mass emissions and actual weighted average flow rate values for batch
process operations.
1. Uncontrolled total
annual mass emissions shall be determined by the following methods:
A. Direct process vent emissions measurements
taken prior to any release to the atmosphere, following any recovery device and
prior to any control device, provided these measurements conform with the
requirements of measuring the mass flow rate of VOC incoming to the control
device as in paragraph (5)(F)2. and subparagraphs (5)(F)3.A. and (5)(F)3.B. of
this rule; or
B. Engineering
estimates of the uncontrolled VOC emissions from a process vent or process
vents, in the aggregate, within a batch process train, using either the
potential or permitted number of batch cycles per year or total production as
represented in the source's operating permit .
(I) Engineering estimates of the uncontrolled
VOC emissions shall be based upon accepted chemical engineering principles,
measurable process parameters, or physical or chemical laws and their
properties. Examples of methods include, but are not limited to, the following:
(a) Use of material balances based on process
stoichiometry to estimate maximum VOC concentrations;
(b) Estimation of maximum flow rate based on
physical equipment design such as pump or blower capacities; and
(c) Estimation of VOC concentrations based on
saturation conditions.
(II) All data, assumptions, and procedures
used in any engineering estimate shall be
documented.
2.
Average flow rate shall be determined by any of the following methods:
A. Direct process vent flow rate measurements
taken prior to any release to the atmosphere, following any recovery device and
prior to any control device, provided such measurements conform with the
requirements of measuring incoming volumetric flow rate in paragraph (5)(F)2.
of this rule;
B. Average flow rate
for a single unit operation having multiple emission events or batch process
trains shall be the weighted average flow rate, calculated as follows:
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where:
WAF =Actual weighted average flow rate for a single unit operation or batch process train;
AFRi =Average flow rate per emission event;
ADEi =Annual duration of emission event; and
n =Number of emission events.
For purposes of this formula, the term "emission event" shall be defined as a discrete period of venting that is associated with a single unit operation. For example, a displacement of vapor resulting from the charging of a single unit operation with VOC will result in a discrete emission event that will last through the duration of the charge and will have an average flow rate equal to the rate of the charge. The expulsion of expanded vapor space when the single unit operation is heated is also an emission event. Both of these examples of emission events and others may occur in the same single unit operation during the course of the batch cycle. If the flow rate measurement for any emission event is zero, according to paragraph (5)(F)2. of this rule, then such event is not an emission event for purposes of this rule section; or
C. Engineering
estimates calculated in accordance with the requirements in subparagraph
(3)(E)1.B. of this rule.
3. For purposes of determining the average
flow rate for steam vacuuming systems, the steam flow shall be included in the
average flow rate calculation.
4.
In cases where two (2) or more single unit operations share a process vent and
where flow measurement for such single unit operations is difficult, alternate
methods of flow measurement may be used only when approved by the
department .
(4)
Reporting and Record Keeping.
(A) Every owner
or operator of a single unit operation or batch process train exempt under
paragraph (1)(C)1. or (1)(C)2. of this rule shall keep records of the
uncontrolled total annual mass emissions and documentation verifying these
values or measurements. The documentation shall include the engineering
calculations, any measurements made in accordance with section (5) of this
rule, and the potential or permitted number of batch cycles per year, or, in
the alternative, total production as represented in the facility's operating
permit.
(B) Every owner or operator
of a single unit operation exempt under subsection (1)(D) of this rule shall
keep the following records:
1. The
uncontrolled total annual mass emissions and documentation verifying these
values or measurements. The documentation shall include any engineering
calculations, any measurements made in accordance with section (5) of this
rule, and the potential or permitted number of batch cycles per year or, in the
alternative, total production as represented in the source's operating permit ;
and
2. The average flow rate in
standard cubic feet per minute (scfm) and documentation verifying this
value.
(C) Every owner or
operator of a batch process operation subject to the control requirements of
section (3) of this rule shall keep records of the following parameters
required to be monitored under subsection (4)(H) of this rule:
1. If using a thermal or catalytic
afterburner to comply with section (3) of this rule, records indicating the
average combustion chamber temperature of the afterburner or the average
temperature upstream and downstream of the catalyst bed for a catalytic
afterburner, measured continuously and averaged over the same time period as
the performance test;
2. If using a
flare to comply with section (3) of this rule, continuous records of the flare
pilot flame monitoring and records of all periods of operations during which
the pilot flame is absent; or
3. If
using any of the following as a control device, the following records:
A. Where a scrubber is used, the exit
specific gravity or alternative parameter which is a measure of the degree of
absorbing liquid saturation, if approved by the department , and the average
exit temperature of the absorbing liquid, measured continuously and averaged
over the same time period as the performance test both measured while the vent
stream is routed normally;
B. Where
a condenser is used, the average exit or product side temperature measured
continuously and averaged over the same time period as the performance test
while the vent stream is routed normally;
C. Where a carbon adsorber is used, the total
steam mass flow measured continuously and averaged over the same time period as
the performance test full carbon bed cycle, temperature of the carbon bed after
regeneration and within fifteen (15) minutes after completion of any cooling
cycle(s), and duration of the carbon bed steaming cycle all measured while the
vent stream is routed normally; or
D. As an alternative to subparagraphs
(4)(C)3.A., (4)(C)3.B. or (4)(C)3.C. of this rule, at a minimum, records
indicating the concentration level or reading indicated by the VOC monitoring
device at the outlet of the scrubber, condenser or carbon adsorber, measured
continuously and averaged over the same time period as the performance test
while the vent stream is routed normally.
(D) Every owner or operator of a single unit
operation claiming a vent stream concentration exemption level shall maintain
records to indicate the vent stream concentration is less than or equal to five
hundred (500) ppmv, and shall notify the department in writing if the vent
stream concentration at any time equals or exceeds five hundred (500) ppmv,
within sixty (60) days after such event. Such notification shall include a copy
of all records of such event.
(E)
An owner or operator of a batch process operation subject to the control
requirements of section (3) of this rule may maintain alternative records other
than those listed in subsection (4)(C) of this rule. Any alternative record
keeping shall be approved by the department and shall be contained in the
source's operating permit as federally enforceable permit conditions.
(F) The owner or operator of a single unit
operation or batch process train exempt from the control requirements of
section (3) of this rule shall notify the department in writing if the
uncontrolled total annual mass emissions exceed the threshold in paragraph
(1)(C)1. or (1)(C)2. of this rule, respectively, within sixty (60) days after
the event occurs. This notification shall include a copy of all records of the
event.
(G) All records required
under this rule section shall be maintained on-site for at least five (5) years
and made available to the department immediately upon request.
(H) Monitoring Requirements.
1. Every owner or operator using an
afterburner to comply with section (3) of this rule shall install, calibrate,
maintain, and operate, according to manufacturer's specifications, temperature
monitoring devices with an accuracy of plus or minus one percent (± 1%)
of the temperature being measured expressed in degrees Celsius, equipped with
continuous recorders.
A. Where a catalytic
afterburner is used, temperature monitoring devices shall be installed in the
gas stream immediately before and after the catalyst bed.
B. Where an afterburner other than a
catalytic afterburner is used, a temperature monitoring device shall be
installed in the combustion chamber.
2. Every owner or operator using a flare to
comply with section (3) of this rule, shall install, calibrate, maintain, and
operate, according to manufacturer's specifications, a heat sensing device,
such as an ultraviolet beam sensor or thermocouple, at the pilot light to
indicate continuous presence of a flame.
3. Every owner or operator using a scrubber
to comply with section (3) of this rule shall install, calibrate, maintain, and
operate, according to manufacturer's specifications, the following:
A. A temperature monitoring device for
scrubbant liquid having an accuracy of plus or minus one percent (+ 1%) of the
temperature being monitored expressed in degrees Celsius and a specific gravity
device for scrubbant liquid, each equipped with a continuous recorder;
or
B. A VOC monitoring device used
to indicate the concentration of VOC exiting the control device based on a
detection principle such as infrared, photoionization, or thermal conductivity,
each equipped with a continuous recorder.
4. Every owner or operator using a condenser
to comply with section (3) of this rule shall install, calibrate, maintain, and
operate, according to manufacturer's specifications, the following:
A. A condenser exit temperature monitoring
device equipped with a continuous recorder and having an accuracy of plus or
minus one percent (+ 1%) of the temperature being monitored expressed in
degrees Celsius; or
B. A VOC
monitoring device used to indicate the concentration of VOC such as infrared,
photoionization, or thermal conductivity, each equipped with a continuous
recorder.
5. Every owner
or operator using a carbon adsorber to comply with this rule shall install,
calibrate, maintain, and operate, according to the manufacturer's
specifications, the following equipment:
A.
An integrating regeneration stream flow monitoring device having an accuracy of
plus or minus ten percent (+ 10%), and a carbon bed temperature monitoring
device having an accuracy of plus or minus one percent (+ 1%) of the
temperature being monitored expressed in degrees Celsius, both equipped with a
continuous recorder; or
B. A VOC
monitoring device used to indicate the concentration level of VOC exiting the
device based on a detection principle such as infrared, photoionization, or
thermal conductivity, each equipped with a continuous recorder.
6. Every owner or operator using a
boiler or process heater with a design heat input capacity less than forty-four
(44) megawatts to comply with section (3) of this rule shall install,
calibrate, maintain, and operate, according to the manufacturer's
specifications, a temperature monitoring device in the firebox with an accuracy
of plus or minus one percent (+ 1%) of the temperature being measured expressed
in degrees Celsius, equipped with a continuous recorder. Any boiler or process
heater in which all process vent streams are introduced with primary fuel is
exempt from this requirement.
7.
The owner or operator of a process vent shall be permitted to monitor by an
alternative method or may monitor parameters other than those listed in
paragraphs (4)(I)1. through (4)(I)6. of this rule, if approved by the
department . The alternative method or parameters shall be contained in the
source's operating permit as federally enforceable permit
conditions.
(5)
Test Methods.
(A) Upon the department 's
request, the owner or operator of a batch process operation shall conduct
testing to demonstrate compliance with section (3) of this rule. The owner or
operator shall, at its own expense, conduct these tests in accordance with the
applicable test methods and procedures specified in subsections (5)(D), (5)(E),
and (5)(F) of this rule.
(B)
Notwithstanding subsection (5)(A) of this rule, flares and process boilers used
to comply with control requirements of section (3) of this rule shall be exempt
from performance testing requirements.
(C) When a flare is used to comply with the
control requirements of section (3) of this rule, the flare shall comply with
the requirements of
40 CFR
60.18, as specified in
10 CSR
10-6.070(3)(A) 1.
(D) The owner or operator of a batch process
operation that is exempt from the control requirements of section (3) of this
rule shall demonstrate, upon the department 's request, the absence of oversized
gas moving equipment in any manifold. Gas moving equipment shall be considered
oversized if it exceeds the maximum requirements of the exhaust flow rate by
more than thirty percent (30%).
(E)
For the purpose of demonstrating compliance with the control requirements in
section (3) of this rule, the batch process operation shall be run at
representative operating conditions and flow rates during any performance
test.
(F) The following methods in
40 CFR 60, Appendix A, as specified in
10 CSR
10-6.030(22), shall be used to
demonstrate compliance with the reduction efficiency requirement in section (3)
of this rule:
1. Method 1 or 1A, as
appropriate, for selection of the sampling sites if the flow measuring device
is not a rotameter. The control device inlet sampling site for determination of
vent stream VOC composition reduction efficiency shall be prior to the control
device and after the control device;
2. Method 2, 2A, 2C, 2D, 2 F, 2G or 2H as
appropriate, for determination of gas stream volumetric flow rate flow
measurements, which shall be taken continuously. No traverse is necessary when
the flow measuring device is an ultrasonic probe; and
3. Method 25A or Method 18, if applicable, to
determine the concentration of VOC in the control device inlet and outlet,
where-
A. The sampling time for each run shall
be as follows:
(I) For batch cycles less than
eight (8) hours in length, appropriate operating parameters shall be recorded
at a minimum of fifteen (15)-minute intervals during the batched
period;
(II) For batch cycles of
eight (8) hours and greater in length, the owner or operator may either test in
accordance with the test procedures defined in part (5)(F)3.A.(I) of this rule
or the owner or operator may elect to perform tests, pursuant to either Method
25A or Method 18, only during those portions of each emission event which
profiles a representative sample occurring within the batch cycle. For each
emission event of less than four (4) hours in duration, the owner or operator
shall test continuously over the entire emission event as in part (5)(F)3.A.(I)
of this rule. For each emission event of greater than four (4) hours in
duration, the owner or operator shall elect either to perform a minimum of
three (3) one-hour test runs during the emission event or shall test
continuously over the entire emission event within each single unit operation
in the batch process train. The owner or operator shall define the total batch
process by all its intrinsic emission events. To demonstrate that the portion
of the emission event to be tested profiles a representative sample occurring
within the batch cycle, the owner or operator electing to rely on this option
shall develop an emission profile for each entire emission event. These
emission profiles shall be based upon either process knowledge or test data
collected. Examples of information that could constitute process knowledge
include, but are not limited to, calculations based on material balances,
duration, emission levels, constituents, reactants, byproducts, and process
stoichiometry. Previous test results may be used provided the results are still
relevant to the current process vent stream conditions; or
(III) For purposes of paragraph (5)(F)3. of
this rule, the term "emission event" means a discrete period of venting that is
associated with a single unit operation. For example, a displacement of vapor
resulting from the charging of a single unit operation with VOC will result in
a discrete emission event that will last through the duration of the charge and
will have an average flow rate equal to the rate of the charge. The expulsion
of expanded single unit operation vapor space when the vessel is heated is also
an emission event. Both of these examples of emission events and others may
occur in the same single unit operation during the course of the batch cycle.
If the flow rate measurement for any emission event is zero (0), in accordance
with paragraph (5)(F)2. of this rule, then this event is not an emission event
for purposes of this rule section;
B. Calculate the mass emission rate
(MERi) into the control device as follows:
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where:
Ci =concentration into the control device; and
Qi =flow rate into the control device;
C. Calculate the
mass emission rate (MERo) out of the control device as
follows:
Click to view image
where:
Co = concentration out of the control device; and
Qo = flow rate out of the control device; and
D. Calculate the
total overall control device efficiency (ETA) as follows:
Click to view image
(G) Upon request by the department to conduct
testing, an owner or operator of a batch process operation which has installed
a scrubber, a shell and tube condenser using a nonrefrigerated cooling media,
or any other control device which meets the criteria of subsection (3)(C) of
this rule, shall demonstrate that the device achieves the control efficiency
applicable within section (3) of this rule.
(H) The owner or operator of a batch process
operation may propose an alternative test method or procedures to demonstrate
compliance with the control requirements in section (3) of this rule.
Alternative methods or procedures may only be used after they are approved by
the department .
(I) In the absence
of a request by the department to conduct performance testing in accordance
with the provisions of this rule section, a source may demonstrate compliance
by the use of engineering estimates or process
stoichiometry.
Notes
*Original authority: 643.050, RSMo 1965, amended 1972, 1992, 1993, 1995.
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