Current through Register Vol. 48, No. 38, September 20, 2024
a)
Each owner or operator subject to the provisions of this Subpart AA must comply
with the test methods and procedures requirements provided in this
Section.
b) When a closed-vent
system is tested for compliance with no detectable emissions, as required in
Section
725.933(k),
the test must comply with the following requirements:
1) Monitoring must comply with Reference
Method 21 (Determination of Volatile Organic Compound Leaks) in appendix A to
40 CFR 60 (Test Methods), incorporated by reference in 35 Ill. Adm. Code
720.111(b).
2) The detection instrument must meet the
performance criteria of Reference Method 21.
3) The instrument must be calibrated before
use on each day of its use by the procedures specified in Reference Method
21.
4) Calibration gases must be:
A) Zero air (less than 10 ppm of hydrocarbon
in air).
B) A mixture of methane or
n-hexane and air at a concentration of approximately, but less than, 10,000 ppm
methane or n-hexane.
5)
The background level must be determined as set forth in Reference Method
21.
6) The instrument probe must be
traversed around all potential leak interfaces as close to the interface as
possible, as described in Reference Method 21.
7) The arithmetic difference between the
maximum concentration indicated by the instrument and the background level is
compared with 500 ppm for determining compliance.
c) Performance tests to determine compliance
with Section
725.932(a)
and with the total organic compound concentration limit of Section
725.933(c)
must comply with the following:
1)
Performance tests to determine total organic compound concentrations and mass
flow rates entering and exiting control devices must be conducted and data
reduced in accordance with the following reference methods and calculation
procedures:
A) Reference Method 2
(Determination of Stack Gas Velocity and Volumetric Flow Rate (Type S Pitot
Tube)) in appendix A to 40 CFR 60 (Test Methods), incorporated by reference in
35 Ill. Adm. Code
720.111(b),
for velocity and volumetric flow rate.
B) Reference Method 18 (Measurement of
Gaseous Organic Compound Emissions by Gas Chromatography) or 25A (Determination
of Total Gaseous Organic Concentration Using a Flame Ionization Analyzer) in
appendix A to 40 CFR 60 (Test Methods), incorporated by reference in 35 Ill.
Adm. Code
720.111(b),
for organic content. If Reference Method 25A is used, the organic hazardous air
pollutant (HAP) used as the calibration gas must be the single HAP that
represents the largest percent by volume of the emissions. The use of Reference
Method 25A is acceptable if the response from the high-level calibration gas is
at least 20 times the standard deviation of the response from the zero
calibration gas when the instrument is zeroed on the most sensitive
scale.
C) Each performance test
must consist of three separate runs, each run conducted for at least 1 hour
under the conditions that exist when the hazardous waste management unit is
operating at the highest load or capacity level reasonably expected to occur.
For the purpose of determining total organic compound concentrations and mass
flow rates, the average of results of all runs applies. The average must be
computed on a time-weighted basis.
D) Total organic mass flow rates must be
determined by the following equation:
i) For
a source utilizing Reference Method 18:
Click
here to view image
Where:
|
Eh
|
=
|
The total organic mass flow rate, kg/h
|
|
Q2sd
|
=
|
The volumetric flow rate of gases entering or exiting
control device, dscm/h, as determined by Reference Method 2
|
|
n
|
=
|
The number of organic compounds in the vent
gas
|
|
Ci
|
=
|
The organic concentration in ppm, dry basis, of
compound i in the vent gas, as determined by Reference Method 18
|
|
MWi
|
=
|
The molecular weight of organic compound i in the
vent gas, kg/kg-mol
|
|
0.0416
|
=
|
The conversion factor for molar volume,
kg-mol/m3, at 293 K and 760 mm Hg
|
|
10-6
|
=
|
The conversion factor from ppm
|
ii)
For a source utilizing Reference Method 25A:
Click
here to view image
Where:
|
Eh
|
=
|
The total organic mass flow rate, kg/h
|
|
Q
|
=
|
The volumetric flow rate of gases entering or exiting
control device, dscm/h, as determined by Reference Method 2
|
|
C
|
=
|
The organic concentration in ppm, dry basis, of
compound i in the vent gas, as determined by Reference Method 25A
|
|
MW
|
=
|
The molecular weight of propane, 44 kg/kg-mol
|
|
0.0416
|
=
|
The conversion factor for molar volume,
kg-mol/m3, at 293 K and 760 mm Hg
|
|
10-6
|
=
|
The conversion factor from ppm
|
E) The annual total organic emission rate
must be determined by the following equation:
A = F x H
Where:
|
A
|
=
|
total organic emission rate, kg/y
|
|
F
|
=
|
the total organic mass flow rate, kg/h, as calculated
in subsection (c)(1)(D)
|
|
H
|
=
|
the total annual hours of operation for the affected
unit, h/y
|
F)
Total organic emissions from all affected process vents at the facility must be
determined by summing the hourly total organic mass emissions rates (F, as
determined in subsection (c)(1)(D)) and by summing the annual total organic
mass emission rates (A, as determined in subsection (c)(1)(E)) for all affected
process vents at the facility.
2) The owner or operator must record such
process information as is necessary to determine the conditions of the
performance tests. Operations during periods of startup, shutdown, and
malfunction do not constitute representative conditions for the purpose of a
performance test.
3) The owner or
operator of an affected facility must provide, or cause to be provided,
performance testing facilities as follows:
A)
Sampling ports adequate for the test methods specified in subsection
(c)(1).
B) Safe sampling
platforms.
C) Safe access to
sampling platforms.
D) Utilities
for sampling and testing equipment.
4) For the purpose of making compliance
determinations, the time-weighted average of the results of the three runs must
apply. In the event that a sample is accidentally lost or conditions occur in
which one of the three runs must be discontinued because of forced shutdown,
failure of an irreplaceable portion of the sample train, extreme meteorological
conditions, or other circumstances beyond the owner or operator's control,
compliance may, upon the Agency's approval, be determined using the average of
the results of the two other runs.
d) To show that a process vent associated
with a hazardous waste distillation, fractionation, thin-film evaporation,
solvent extraction, or air or steam stripping operation is not subject to the
requirements of this Subpart AA, the owner or operator must make an initial
determination that the time-weighted, annual average total organic
concentration of the waste managed by the waste management unit is less than 10
ppmw using one of the following two methods:
1) Direct measurement of the organic
concentration of the waste using the following procedures:
A) The owner or operator must take a minimum
of four grab samples of waste for each waste stream managed in the affected
unit under process conditions expected to cause the maximum waste organic
concentration.
B) For waste
generated onsite, the grab samples must be collected at a point before the
waste is exposed to the atmosphere, such as in an enclosed pipe or other closed
system that is used to transfer the waste after generation to the first
affected distillation, fractionation, thin-film evaporation, solvent
extraction, or air or steam stripping operation. For waste generated offsite,
the grab samples must be collected at the inlet to the first waste management
unit that receives the waste provided the waste has been transferred to the
facility in a closed system such as a tank truck and the waste is not diluted
or mixed with other waste.
C) Each
sample must be analyzed and the total organic concentration of the sample must
be computed using Method 9060A (Total Organic Carbon) of "Test Methods for
Evaluating Solid Waste, Physical/Chemical Methods", USEPA publication number
EPA-530/SW-846, incorporated by reference under 35 Ill. Adm. Code
720.111(a),
or analyzed for its individual constituents.
D) The arithmetic mean of the results of the
analyses of the four samples apply for each wastestream managed in the unit in
determining the time-weighted, annual average total organic concentration of
the waste. The time-weighted average is to be calculated using the annual
quantity of each waste stream processed and the mean organic concentration of
each wastestream managed in the unit.
2) Using knowledge of the waste to determine
that its total organic concentration is less than 10 ppmw. Documentation of the
waste determination is required. Examples of documentation that must be used to
support a determination under this subsection (d)(2) include the following:
A) Production process information documenting
that no organic compounds are used;
B) Information that the waste is generated by
a process that is identical to a process at the same or another facility that
has previously been demonstrated by direct measurement to generate a
wastestream having a total organic content less than 10 ppmw; or
C) Prior speciation analysis results on the
same wastestream where it is documented that no process changes have occurred
since that analysis that could affect the waste total organic
concentration.
e) The determination that distillation,
fractionation, thin-film evaporation, solvent extraction, or air or steam
stripping operations that manage hazardous wastes with time-weighted, annual
average total organic concentrations less than 10 ppmw must be made as follows:
1) By the effective date that the facility
becomes subject to the provisions of this Subpart AA or by the date when the
waste is first managed in a waste management unit, whichever is
later;
2) For continuously
generated waste, annually; and
3)
Whenever there is a change in the waste being managed or a change in the
process that generates or treats the waste.
f) When an owner or operator and the Agency
do not agree on whether a distillation, fractionation, thin-film evaporation,
solvent extraction, or air or steam stripping operation manages a hazardous
waste with organic concentrations of at least 10 ppmw based on knowledge of the
waste, the dispute may be resolved using direct measurement, as specified in
subsection (d)(1).
