| Absorbers |
| 1. Exit temperature of the absorbing liquid | Maximum temperature | Continuous | Every 15 minutes | 3-hour block average. |
| 2. Exit specific gravity | Exit specific gravity range | Continuous | Every 15 minutes | 3-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 bed | Minimum temperature | Continuous | Every 15 minutes | 3-hour block average. |
| 5. Temperature difference between the catalyst bed inlet and the catalyst bed outlet | Minimum temperature difference | Continuous | Every 15 minutes | 3-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 regeneration | Every 15 minutes during regeneration cycle | Total 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 regeneration | Every 15 minutes during regeneration cycle | Total 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 regeneration | Continuously 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. Breakthrough | As defined in § 60.611a | As required by § 60.613a(a)(6)(iii)(B) | Each monitoring event | N/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 effluent | Minimum pH | Continuous | Every 15 minutes | 3-hour block average. |
| 12. Influent liquid flow | Minimum inlet liquid flow | Continuous | Every 15 minutes | 3-hour block average. |
| 13. Influent liquid flow rate and gas stream flow rate | Minimum influent liquid-to-gas ratio | Continuous | Every 15 minutes | 3-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. |