StacksVerified U.S. regulatory reference

40 CFR Part 60, Table 3

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
For theoperating parameter applicable to you, as specified in Table 2 . . .You must establish the following operating parameter limit . . .And you must monitor, record, and demonstrate continuous compliance using these minimum frequencies . . .
Data measurementDatarecordingDataaveraging period for compliance

Absorbers

1. Exit temperature of the absorbing liquidMaximum temperatureContinuousEvery 15 minutes3-hour block average
2. Exit specific gravityExit specific gravity rangeContinuousEvery 15 minutes3-hour block average

Boilers or process heaters

(with a design heat input capacity <44MW and vent stream is not introduced with or as the primary fuel)

3. Firebox temperature | Minimum firebox temperature | Continuous | Every 15 minutes | 3-hour block average

Catalytic incinerators

4. Temperature in gas stream immediately before the catalyst bedMinimum temperatureContinuousEvery 15 minutes3-hour block average
5. Temperature difference between the catalyst bed inlet and the catalyst bed outletMinimum temperature differenceContinuousEvery 15 minutes3-hour block average

Carbon adsorbers

6. Total regeneration stream mass flow during carbon bed regeneration cycle(s)Minimum mass flow during carbon bed regeneration cycle(s)Continuously during regenerationEvery 15 minutes during regeneration cycleTotal flow for each regeneration cycle
7. Total regeneration stream volumetric flow during carbon bed regeneration cycle(s)Minimum volumetric flow during carbon bed regeneration cycle(s)Continuously during regenerationEvery 15 minutes during regeneration cycleTotal flow for each regeneration cycle
8. Temperature of the carbon bed after regeneration [and within 15 minutes of completing any cooling cycle(s)]Maximum temperature of the carbon bed after regenerationContinuously during regeneration and for 15 minutes after completing any cooling cycle(s)Every 15 minutes during regeneration cycle (including any cooling cycle)Average of regeneration cycle
9. BreakthroughAs defined in § 60.701aAs required by § 60.703a(a)(6)(iii)(B)Each monitoring eventN/A

Condensers

10. Exit (product side) temperature | Maximum temperature | Continuous | Every 15 minutes | 3-hour block average

Scrubbers for halogenated vent streams

11. pH of scrubber effluentMinimum pHContinuousEvery 15 minutes3-hour block average
12. Influent liquid flowMinimum inlet liquid flowContinuousEvery 15 minutes3-hour block average
13. Influent liquid flow rate and gas stream flow rateMinimum influent liquid-to-gas ratioContinuousEvery 15 minutes3-hour block average

Thermal incinerators

14. Firebox temperature | Minimum firebox temperature | Continuous | Every 15 minutes | 3-hour block average

Control devices other than an incinerator, boiler, process heater, or flare; or recovery devices other than an absorber, condenser, or carbon adsorber

15. As specified by the Administrator | As specified by the Administrator | As specified by the Administrator | As specified by the Administrator | As specified by the Administrator