ILLINOIS REGISTER 10682
POLLUTION CONTROL BOARD
NOTICE OF ADOPTED AMENDMENTS
sorbent traps prior to each test run. For each run, the sorbent trap data must be
validated according to the quality assurance criteria in Section 8 of Exhibit D to
b) To properly correlate the mercury, volumetric flow rate, moisture, CO2 or O2
monitoring system data with the reference method data, annotate the beginning
and end of each reference method test run (including the exact time of day) on the
individual chart recorders or other permanent recording devices.
6.5.7 Correlation of Reference Method and Continuous Emission Monitoring System
Confirm that the monitoring system and reference method test results are on consistent moisture,
pressure, temperature, and diluent concentration basis (e.g., since the flow monitor measures
flow rate on a wet basis, Method 2 test results must also be on a wet basis). Compare flow-monitor
and reference method results on a scfh basis. Also, consider the response times of the
pollutant concentration monitor, the continuous emission monitoring system, and the flow
monitoring system to ensure comparison of simultaneous measurements.
For each relative accuracy test audit run, compare the measurements obtained from the
continuous emission monitoring system (in μg/m3, % CO2, % O2, or % H2O, as applicable)
against the corresponding reference method values. Tabulate the paired data in a table such as the
one shown in Figure 2.
6.5.8 Number of Reference Method Tests
Perform a minimum of nine sets of paired monitor (or monitoring system) and reference method
test data for every required (i.e., certification, recertification, diagnostic, semiannual, or annual)
relative accuracy test audit. For 2-load and 3-load relative accuracy test audits of flow monitors,
perform a minimum of nine sets at each of the load levels.
6.5.9 Reference Methods
The following methods are from appendix A to 40 CFR 60, incorporated by reference in Section
225.140, or have been published by ASTM, and are the reference methods for performing
relative accuracy test audits under this Part: Method 1 or 1A in appendix A-1 to 40 CFR 60 for
siting; Method 2 or its allowable alternatives in appendices A-1 and A-2 to 40 CFR 60 (except
for Methods 2B and 2E) for stack gas velocity and volumetric flow rate; Method 3, 3A or 3B in
appendix A-2 to 40 CFR 60 for O2 and CO2; Method 4 in appendix A-3 to 40 CFR 60 for
moisture; and for mercury, either ASTM D6784-02 (the Ontario Hydro Method, incorporated by
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