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 C - Reference Methods and Procedures

Current through Register Vol. 48, No. 28, July 12, 2024
Introduction
This Appendix presents the reference methods and procedures
				  required for implementing Reasonably Available Control Technology (RACT).
				  Methods and procedures are identified for two types of RACT
				  implementation:
a) Determination of VOM destruction efficiency for
				  evaluating compliance with the 98 weight percent VOM reduction or 20 ppmv
				  emission limit specified in Sections 218.520 through 218.527 of this Part;
				  and
b) Determination of offgas flowrate, hourly
				  emissions and stream net heating value for calculating TRE.
All reference methods identified in this Appendix refer to
				  the reference methods specified at 40 CFR 60, Appendix A, incorporated by
				  reference in Section 218.112 of this Part.
VOM DESTRUCTION EFFICIENCY
				  DETERMINATION
The following reference methods and procedures are required
				  for determining compliance with the percent destruction efficiency specified in
				  Sections 218.520 through 218.527 of this Part.
a) Reference Method 1 or 1A for selection of the
				  sampling site. The control device inlet sampling site for determination of vent
				  stream molar composition or total organic compound destruction efficiency shall
				  be prior to the inlet of any control device and after all recovery
				  devices.
b) Reference Methods 2, 2A, 2C or 2D for
				  determination of the volumetric flowrate.
c) Reference Method 3 to measure oxygen
				  concentration of the air dilution correction. The emission sample shall be
				  corrected to 3 percent oxygen.
d) Reference Method 18 to determine the
				  concentration of total organic compounds (minus methane and ethane) in the
				  control device outlet and total organic compound reduction efficiency of the
				  control device.
TRE DETERMINATION
The following reference methods and procedures are required
				  for determining the offgas flowrate, hourly emissions, and the net heating
				  value of the gas combusted to calculate the vent stream TRE.
a) Reference Method 1 or 1A for selection of the
				  sampling site. The sampling site for the vent stream flowrate and molar
				  composition determination prescribed in (b) and (c) shall be prior to the inlet
				  of any combustion device, prior to any post-reactor dilution of the stream with
				  air and prior to any post-reactor introduction of halogenated compounds into
				  the vent stream. Subject to the preceding restrictions on the sampling site, it
				  shall be after the final recovery device. If any gas stream other than the air
				  oxidation vent stream is normally conducted through the recovery system of the
				  affected facility, such stream shall be rerouted or turned off while the vent
				  stream is sampled, but shall be routed normally prior to the measuring of the
				  initial value of the monitored parameters for determining compliance with the
				  recommended RACT. If the air oxidation vent stream is normally routed through
				  any equipment which is not a part of the air oxidation process as defined in 35
				  Ill. Adm. Code 211.350, such equipment shall be bypassed by the vent stream
				  while the vent stream is sampled, but shall not be bypassed during the
				  measurement of the initial value of the monitored parameters for determining
				  compliance with Subpart V.
b) The molar composition of the vent stream shall
				  be determined using the following methods:
1) Reference Method 18 to measure the
				  concentration of all organics, including those containing halogens, unless a
				  significant portion of the compounds of interest are polymeric (high molecular
				  weight), can polymerize before analysis or have low vapor pressures, in which
				  case Reference Method 25(a) shall be used.
2) ASTM D1946-67 (reapproved 1977), incorporated
				  by reference in Section 218.112 of this Part, to measure the concentration of
				  carbon monoxide and hydrogen.
3) Reference Method 4 to measure the content of
				  water vapor, if necessary.
c) The volumetric flowrate shall be determined
				  using Reference Method 2, 2A, 2C or 2D, as appropriate.
d) The net heating value of the vent stream shall
				  be calculated using the following equation:
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				  image
Where:
H
=
Net heating value of the sample, MJ/ppm, where the
							 net enthalpy per mole of offgas is based on combustion at 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 F (vent stream flowrate)
							 below
K
=
Constant, 1.740 X 10-7
							 (1/ppm) (mole/scm) (MJ/kcal) where standard temperature for mole/scm is 20°
							 C
Ci
=
Concentration of sample component i, reported on a
							 wet basis, in ppm, as measured by Reference Method 18 or ASTM D1946-67
							 (reapproved 1977), incorporated by reference in Section 218.112 of this
							 Part.
Hi
=
Net heat of combustion of sample component i,
							 kcal/mole based on combustion at 25° C and 760 mmHg. If published values
							 are not available or cannot be calculated, the heats of combustion of vent
							 stream components are required to be determined using ASTM D2382-76,
							 incorporated by reference in Section 218.112 of this Part.
e) The emission rate of total organic compounds in
				  the process vent stream shall be calculated using the following equation:
Click here to view
				  image
E
=
Emission rate of total organic compounds (minus
							 methane and ethane) in the sample in kg/hr;
K
=
Constant, 2.494 X 10-6
							 (1/ppm) (mole/scm) (kg/g) (min/hr), where standard temperature for mole/scm is
							 20° C;
Mi
=
Molecular weight of sample component I
							 (g/mole)
F
=
Vent stream flow rate (scm/min), at a standard
							 temperature of 20° C.
f) 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 Reference Method 18.