ILLINOIS REGISTER 10725
09
POLLUTION CONTROL BOARD
NOTICE OF ADOPTED AMENDMENTS
Daily
[FN*] Weekly
Quarterly
[FN*]
Semiannual
[FN*] Annual
Calibration Error Test (2 pt.) /
Interference Check (flow) /
Flow-to-Load Ratio /
Leak Check (DP flow monitors) /
Linearity Check or System
Integrity Check [FN**] (3 pt.)
/
Single-point System Integrity
Check [FN**]
/
RATA (SO2, NOx, CO2, O2,
H2O) [FN1]
/
RATA (All Hg monitoring
systems)
/
RATA (flow) [FN1] [FN2] /
[FN*] "Daily" means operating days, only. "Weekly" means once every 168 unit or stack
operating hours. "Quarterly" means once every QA operating quarter. "Semiannual" means once
every two QA operating quarters. "Annual" means once every four QA operating quarters.
[FN**] The system integrity check applies only to Hg monitors with converters. The single-point
weekly system integrity check is not required if daily calibrations are performed using a
NIST-traceable source of oxidized Hg. The 3-point quarterly system integrity check is not
required if a linearity check is performed.
[FN1] Conduct RATA annually (i.e., once every four QA operating quarters), if monitor meets
accuracy requirements to qualify for less frequent testing. [FN2] For flow monitors installed on
peaking units, bypass stacks conduct all RATAs at a single, normal load (or operating level). For
other flow monitors, conduct annual RATAs at two load levels (or operating levels). Alternating
single-load and 2-load (or single-level and 2-level) RATAs may be done if a monitor is on a
semiannual frequency. A single-load (or single-level) RATA may be done in lieu of a 2-load (or
2-level) RATA if, since the last annual flow RATA, the unit has operated at one load level (or
operating level) for ≥ 85.0 percent of the time. A 3-level RATA is required at least once every
