Current through March 20, 2024
Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11
Affected: IC 13-14-4-3; IC 13-15; IC 13-17
Sec. 5.
(a) Except
for affected units under 40 CFR 75 * that are also emissions units subject to
this rule, quality assurance requirements specified in this section and 40 CFR
60 *, Appendix F, apply to continuous emission monitors that monitor the
following:
(1) Carbon dioxide
(CO2).
(2)
Carbon monoxide (CO).
(3) Hydrogen
sulfide (H2S).
(4) Nitrogen oxide
(NOx).
(5)
Oxygen (O2).
(6) Sulfur dioxide
(SO2).
(7)
Total hydrocarbons (THC).
(8) Total
reduced sulfur (TRS).
(9) Volatile
organic compounds (VOC).
(10)
Particulate matter (PM).
(b) Emissions units that are also subject to
40 CFR 75 * shall follow the quality assurance procedures of 40 CFR 75 * and
report the results in accordance with subsection (f).
(c) Quality control (QC) requirements for
COMS are as follows:
(1) For calibration
drift (CD) assessment, the COMS shall be checked at least once daily. The CD
shall be quantified and recorded at zero (0) (or low level) and upscale level
opacity. The COMS shall be adjusted whenever the CD exceeds the specification
of 40 CFR 60, Appendix B*, Performance Specification 1 (PS-1), and the COMS
shall be declared out of control when the CD exceeds twice the specification of
PS-1. Corrective actions, followed by a validating CD assessment, are required
when the COMS is out of control.
(2) For fault indicators assessment, the
fault lamp indicators, data acquisition system error messages, and other system
self-diagnostic indicators shall be checked at least daily. Appropriate
corrective actions shall be taken when the COMS is operating outside the preset
limits.
(3) For performance audits,
checks of the individual COMS components and factors affecting the accuracy of
the monitoring data, as described in this subdivision, shall be conducted, at a
minimum, on a calendar quarter basis. The absolute minimum checks included in
the performance audit are as follows:
(A) The
status of the optical alignment of the monitor components shall be checked and
recorded according to the procedure specified by the monitor manufacturer.
Monitor components must be realigned as necessary.
(B) The apparent effluent opacity shall be
compared and recorded before and after cleaning each of the exposed optical
surfaces. The total optical surface dust accumulation shall be determined by
summing up the apparent reductions in opacity for all of the optical surfaces
that are cleaned.
(C) The zero (0)
and upscale response errors shall be determined and recorded according to the
CD procedures. The errors are defined as the difference (in percent opacity)
between the correct value and the observed value for the zero (0) and high
level calibration checks.
(D) The
value of the zero (0) compensation applied at the time of the audit shall be
calculated as equivalent opacity, corrected to stack exit conditions, according
to the procedures specified by the manufacturer. The compensation applied to
the effluent recorded by the monitor system shall be recorded.
(E) The optical pathlength correction ratio
(OPLR) shall be computed from the monitor pathlength and stack exit diameter
and shall be compared, and the difference recorded, to the monitor setup OPLR
value. The stack exit correlation error shall be determined as the absolute
value of the difference between the measured value and the correct value,
expressed as a percentage of the correct value.
(F) A three-point calibration error test of
the COMS shall be conducted. Three (3) neutral density filters meeting the
requirements of PS-1 shall be placed in the COMS light beam path. The monitor
response shall be independently recorded from the COMS permanent data recorder.
A total of five (5) nonconsecutive readings for each filter shall be made. The
low-range, mid-range, and high-range calibration error results shall be
computed as the mean difference and ninety-five percent (95%) confidence
interval for the difference between the expected and the actual responses of
the monitor as corrected to stack exit conditions. These values shall be
calculated using the procedure of PS-1, Section 8.0. The following are
requirements for these values:
(i) The
calibration error test requires the installation of an external calibration
audit device (zero-jig). The zero-jig shall be adjusted to provide the same
zero (0) response as the monitor's simulated zero (0).
(ii) Use calibration attenuators, that is,
neutral density filters or screens, with values that have been determined
according to PS-1, Section 7.1.3, "Attenuator Calibration", and produce
simulated opacities (as corrected to stack exit conditions) in the ranges
listed in Table 1-2 in PS-1.
(iii)
The stability of the attenuator values shall be checked at least once per year
according to the procedures specified in PS-1. The attenuators shall be
recalibrated if the stability checks indicate a change of two percent (2%)
opacity or greater.
(4) The following are requirements for
monitor acceptance criteria:
(A) The following
criteria are to be used to determine if the COMS audit results are acceptable:
TABLE 1. PERFORMANCE AUDIT CRITERIA
| Stack Exit Correlation Error |
<= 2 percent |
| Zero and Upscale Responses |
<= 2 percent opacity |
| Zero Compensation |
<= 4 percent opacity |
| Optical Alignment |
Misalignment error |
|
|
<= 2 percent opacity |
| Optical Surface Dust Accumulation |
<= 4 percent opacity |
| Calibration Error |
<= 3 percent opacity |
(B)
The COMS is out of control whenever the results of a quarterly performance
audit indicate noncompliance with any of the performance assessment criteria of
Table 1 in clause (A). If the COMS is out of control, the owner or operator
shall take the action necessary to eliminate the problem. Following corrective
action, the source or emissions unit owner or operator shall reconduct the
appropriate failed portion of the audit and other applicable portions to
determine whether the COMS is operating properly and within specifications. The
COMS owner or operator shall record both audit results showing the COMS to be
out of control and the results following corrective action.
(C) Repeated audit failures, that is, out of
control conditions revealed in the quarterly audits, indicate that the QC
procedures are inadequate or the COMS is incapable of providing quality data.
The source or emissions unit owner or operator shall:
(i) increase the frequency of the QC
procedures in this subsection until the performance criteria are maintained;
or
(ii) modify or replace the COMS
whenever two (2) consecutive quarters of unacceptable performance
occur.
(5)
The performance audit calculations contained in PS-1, Section 8 shall be
followed.
(d) Except
where 40 CFR 75 * is applicable for affected emissions units under the acid
rain program, quality control requirements for flow monitoring systems are as
follows:
(1) For CD assessment, the flow
monitoring system shall be checked at least once daily. The CD shall be
quantified and recorded at zero (0) (or low level) and upscale level. The flow
monitoring systems shall be adjusted whenever the CD exceeds the specification
of 40 CFR 60, Appendix B, Performance Specification 6 (PS-6)*, and the flow
monitoring systems shall be declared out of control when the CD exceeds twice
the specification of PS-6. Corrective actions, followed by a validating CD
assessment, are required when the flow monitoring system is out of
control.
(2) An annual relative
accuracy test.
(e) The
owner or operator of a peaking unit, as defined in 326 IAC 3-4-1(13), shall
conduct a relative accuracy test audit (RATA) on any required CEMS as specified
in 40 CFR 60, Appendix F* or as follows:
(1)
For each primary and redundant backup monitoring system and each sorbent trap
monitoring system, RATAs shall be performed once every four (4) successive QA
operating quarters.
(2) A calendar
quarter that does not qualify as a QA operating quarter shall be excluded in
determining the deadline for the next RATA.
(3) Not more than eight (8) successive
calendar quarters shall elapse after the quarter in which a RATA was last
performed without a subsequent RATA having been conducted.
(4) If a RATA has not been completed by the
end of the eighth calendar quarter since the quarter of the last RATA, then the
RATA must be completed within a seven hundred twenty (720) unit, or stack,
operating hour grace period, as provided in 40 CFR 75, Appendix B, Section
2.3.3,* following the end of the eighth successive elapsed calendar quarter, or
data from the CEMS will become invalid.
(f) Reporting requirements for performance
audits are as follows:
(1) Owners or
operators of emissions units required to conduct:
(A) cylinder gas audit;
(B) relative accuracy test audit;
or
(C) continuous opacity monitor
calibration error audit;
on continuous emission monitors shall prepare a written
report of the results of the performance audit for each calendar quarter, or
for other periods required by the department. The owner or operator shall
submit quarterly reports to the department within thirty (30) calendar days
after the end of each quarter for cylinder gas audits and continuous opacity
monitor calibration error audits and within forty-five (45) calendar days after
the completion of the test for relative accuracy test audits.
(2) The performance audit report
shall contain the following information:
(A)
Plant and monitor information, including the following:
(i) The plant name and address.
(ii) The monitor brand or manufacturer's
name, model, and serial number.
(iii) The monitor span.
(iv) The monitor location.
(B) Performance audit information,
including the following:
(i) The auditor's
name.
(ii) A copy of the audit
standard's certification.
(iii) All
data used to calculate the audit results.
(iv) The audit results and an indication if
the monitor passed or failed the audit. If the performance audit results show
the CEMS or COMS to be out of control, the CEMS or COMS owner or operator shall
report both the audit results showing the CEMS or COMS to be out of control and
the results of the audit following corrective action showing the COMS to be
operating within specification.
(v)
Any corrective actions performed as the result of a failed audit.
(g) Whenever
a relative accuracy test audit of any continuous emission monitor listed in
subsection (a) or (e) is performed, the department must be notified in
accordance with the protocol requirements of 326 IAC 3-6-2 at least thirty-five
(35) days prior to the audit.
*These documents are incorporated by reference. Copies may be
obtained from the Government Printing Office, 732 North Capitol Street NW,
Washington, D.C. 20401 or are available for review and copying at the Indiana
Department of Environmental Management, Office of Air Quality, Indiana
Government Center North, Tenth Floor, 100 North Senate Avenue, Indianapolis,
Indiana 46204.
