Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 218 - ORGANIC MATERIAL EMISSION STANDARDS AND LIMITATIONS FOR THE CHICAGO AREA › Subpart UU - RECORDKEEPING AND REPORTING › Appendix G - TRE Index Measurements for SOCMI Reactors and Distillation Units

Current through Register Vol. 48, No. 28, July 12, 2024
For purposes of Subpart Q, Sections 218.431 through 218.435,
				  the following apply:
a) The following test methods shall be used to
				  determine compliance with the total resource effectiveness ("TRE") index
				  value:
1) Method 1 or 1A, incorporated by reference at
				  Section 218.112 of this Part, as appropriate, for selection of the sampling
				  site.
A) The sampling site for the vent stream molar
				  composition determination and flow rate prescribed in subsections (a)(2) and
				  (a)(3) of this Appendix shall be, except for the situations outlined in
				  subsection (a)(1)(B), after the final recovery device, if a recovery system is
				  present, prior to the inlet of any control device, and prior to any
				  post-reactor or post-distillation unit introduction of halogenated compounds
				  into the vent stream. No traverse site selection method is needed for vents
				  smaller than 10 cm in diameter.
B) If any gas stream other than the reactor or
				  distillation unit vent stream is normally conducted through the final recovery
				  device:
i) The sampling site for vent stream flow rate and
				  molar composition shall be prior to the final recovery device and prior to the
				  point at which any nonreactor or nondistillation unit vent stream or stream
				  from a nonaffected reactor or distillation unit is introduced. Method 18
				  incorporated by reference at Section 218.112 of this Part, shall be used to
				  measure organic compound concentrations at this site.
ii) The efficiency of the final recovery device is
				  determined by measuring the organic compound concentrations using Method 18,
				  incorporated by reference at Section 218.112 of this Part, at the inlet to the
				  final recovery device after the introduction of all vent streams and at the
				  outlet of the final recovery device.
iii) The efficiency of the final recovery device
				  determined according to subsection (a)(1)(B)(ii) of this Appendix shall be
				  applied to the organic compound concentrations measured according to subsection
				  (a)(1)(B)(i) of this Appendix to determine the concentrations of organic
				  compounds from the final recovery device attributable to the reactor or
				  distillation unit vent stream. The resulting organic compound concentrations
				  are then used to perform the calculations outlined in subsection (a)(4) of this
				  Appendix.
2) The molar composition of the vent stream shall
				  be determined as follows:
A) Method 18, incorporated by reference at Section
				  218.112 of this Part, to measure the concentration of organic compounds
				  including those containing halogens;
B) ASTM D1946-77, incorporated by reference at
				  Section 218.112 of this Part, to measure the concentration of carbon monoxide
				  and hydrogen; and
C) Method 4, incorporated by reference at Section
				  218.112 of this Part, to measure the content of water vapor.
3) The volumetric flow rate shall be determined
				  using Method 2, 2A, 2C, or 2D, incorporated by reference at Section 218.112 of
				  this Part, as appropriate.
4) The emission rate of VOM (minus methane and
				  ethane) (E[VOM]) in the vent stream shall be calculated using the following
				  formula:
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				  image
where:
EVOM
=
Emission rate of VOM (minus methane and ethane) in
							 the sample, kg/hr.
K2
=
Constant, 2.494 x 10-6
							 (l/ppmv) (g-mole/scm) (kg/g) (min/hr), where standard temperature for
							 (g-mole/scm) is 20° C.
Cj
=
Concentration of compound j, on a dry basis, in ppmv
							 as measured by Method 18 incorporated by reference at 218.112 of this Part, as
							 indicated in Section 218.433(c)(3) of this Part.
Mj
=
Molecular weight of sample j, g/g-mole.
Qs
=
Vent stream flow rate (scm) at a temperature of
							 20° C.
5) The total vent stream concentration (by volume)
				  of compounds containing halogens (ppmv, by compound) shall be summed from the
				  individual concentrations of compounds containing halogens which were measured
				  by Method 18, incorporated by reference at Section 218.112 of this Part.
6) The net heating value of the vent stream shall
				  be calculated using the following:
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				  image
where:
HT
=
Net heating value of the sample (MJ/scm), where the
							 net enthaply per mole of vent stream is based on combustion of 25°C and 760
							 mmHG, but the standard temperature for determining the volume corresponding to
							 one mole is 20°C, as in the definition of Qs (vent
							 stream flow rate).
K1
=
Constant, 1.740 x 10-7
							 (ppmv)-1 (g-mole/scm), (MJ/KCal), where standard
							 temperature for (g-mole/scm) is 20°C.
Bws
=
Water vapor content of the vent stream, proportion by
							 volume; except that if the vent stream passes through a final stream jet and is
							 not condensed, it shall be assumed that Bws = 0.023 in
							 order to correct to 2.3 percent moisture.
Cj
=
Concentration on a dry basis of compound j in ppmv,
							 as measured for all organic compounds by Method 18, incorporated by reference
							 at Section 218.112 of this Part, and measured for hydrogen and carbon monoxide
							 by using ASTM D1946-77, incorporated by reference at Section 218.112 of this
							 Part.
Hj
=
Concentration on a dry basis of compound j in ppmv,
							 as measured for all organic compounds by Method 18, incorporated by reference
							 at Section 218.112 of this Part, and measured for hydrogen and carbon monoxide
							 by using ASTM D1946-77, incorporated by reference at Section 218.112 of this
							 Part.
b)
1) The TRE index value of the vent shall be
				  calculated using the following:
Click here to view
				  image
where:
TRE
=
TRE index value.
EVOM
=
Hourly emission rate of VOM (kg/hr) as calculated in
							 subsection (a)(4) of this Appendix.
Qs
=
Vent stream flow rate scm/min at a standard
							 temperature of 20°C.
HT
=
Vent stream net heating value (MJ/scm), as calculated
							 in subsection (a)(6) of this Appendix.
EVOM
=
Hourly emission rate of VOM (minus methane and
							 ethane), (kg/hr) as calculated in subsection (a)(4) of this Appendix.
a,b,c,d
=
Value of coefficients presented below are:
Value of
							 Coefficients
Type of Stream
Control Device Basis
a
b
c
d
Nonhalogenated
Flare
2.129
0.183
-0.005
0.359
Thermal incinerator zero (0) Percent heat
							 Recovery
3.075
0.021
-0.037
0.018
Thermal incinerator 70 Percent heat Recovery
3.803
0.032
-0.042
0.007
Halogenated
Thermal incinerator and scrubber
5.470
0.181
-0.040
0.004
2) Every owner or operator of a vent stream shall
				  use the applicable coefficients identified for values a, b, c, and d in
				  subsection (b)(1) of this Appendix to calculate the TRE index value based on a
				  flare, a thermal incinerator with zero (0) percent heat recovery, and a thermal
				  incinerator with 70 percent heat recovery, and shall select the lowest TRE
				  index value.
3) Every owner or operator of a reactor or
				  distillation unit with a halogenated vent stream, determined as any stream with
				  a total concentration of halogen atoms contained in organic compounds of 200
				  ppmv or greater, shall use the applicable coefficients identified for values a,
				  b, c and d in subsection (b)(1) of this Appendix to calculate the TRE index
				  value based on a thermal incinerator and scrubber.
c) Every owner or operator of a source seeking to
				  comply with Section 218.432(b) of this Part shall recalculate the flow rate and
				  VOM concentration for each affected vent stream whenever process changes are
				  made. Examples of process changes include, but are not limited to, changes in
				  production capacity, feedstock type, or catalyst type, or whenever there is
				  replacement, removal, or addition of recovery equipment. The flow rate and VOM
				  concentration shall be recalculated based on test data, or on best engineering
				  estimates of the effects of the change to the recovery system.
d) Whenever a process change, as defined in
				  Section 218.435(c) of this Subpart, yields a TRE index value of 1.0 or less,
				  the owner or operator shall notify and submit a report to the Agency according
				  to the requirements specified in Section 218.435(c) of this Subpart, within 180
				  calendar days after the process change and shall conduct a performance test
				  according to the methods and procedures required by Section 218.433 of this
				  Part.
e) For the purpose of demonstrating that a process
				  vent stream has a VOM concentration below 500 ppmv, the following shall be
				  used:
1) The sampling site shall be selected as
				  specified in Section 218.433(c)(1) of this Part.
2) Method 18 or Method 25A of 40 CFR Part 60,
				  Appendix A, incorporated by reference at Section 218.112 of this Part, shall be
				  used to measure concentration; alternatively, any other method or data that has
				  been validated according to the protocol in Method 301 of 40 CFR Part 63,
				  Appendix A, incorporated by reference at Section 218.112 of this Part, may be
				  used.
3) Where Method 18 is used, the following
				  procedures shall be used to calculate ppmv concentration:
i) The minimum sampling time for each run shall be
				  1 hour in which either an integrated sample or four grab samples shall be
				  taken. If grab sampling is used, then the samples shall be taken at
				  approximately equal intervals in time, such as 15 minute intervals during the
				  run.
ii) The concentration of VOM shall be calculated
				  using Method 18 according to Section 218.433(c)(4) of this Part.
4) Where Method 25A is used, the following
				  procedures shall be used to calculate ppmv VOM concentration:
i) Method 25A shall be used only if a single VOM
				  is greater than 50 percent of total VOM, by volume, in the process vent
				  stream.
ii) The vent stream composition may be determined
				  by either process knowledge, test data collected using an appropriate Reference
				  Method or a method of data collection validated according to the protocol in
				  Method 301 of 40 CFR Part 63, Appendix A, incorporated by reference at Section
				  218.112 of this Part. Examples of information that constitute process knowledge
				  include calculations based on material balances, process stoichiometry, or
				  previous test results provided the results are still relevant to the current
				  process vent stream conditions.
iii) The VOM used as the calibration gas for
				  Method 25A shall be the single VOM present at greater than 50 percent of the
				  total VOM by volume.
iv) The span value for Method 25A shall be 50
				  ppmv.
v) Use of 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.
vi) The concentration of VOM shall be corrected to
				  3 percent oxygen using the procedures and equation in Section 218.433(c)(3) of
				  this Part.
5) The owner or operator shall demonstrate that
				  the concentration of VOM, including methane and ethane, measured by Method 25A
				  is below 250 ppmv to qualify for the low concentration exclusion in Section
				  218.431 of this Part.