40 CFR Part 63, Table 8
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| Device | Parameters to be monitored | Established operating parameter(s) |
|---|---|---|
| Thermal incinerator | Firebox temperature | Minimum temperature. |
| Catalytic incinerator | Temperature upstream and downstream of the catalyst bed | Minimum upstream temperature; and minimum temperature difference across the catalyst bed. |
| Boiler or process heater | Firebox temperature | Minimum temperature. |
| Scrubber for halogenated vents | pH of scrubber effluent; and scrubber liquid and gas flow rates [§ 63.1324(b)(4)(ii)] | Minimum pH; and minimum liquid/gas ratio. |
| Absorber | Exit temperature of the absorbing liquid; and exit specific gravity of the absorbing liquid | Maximum temperature; and maximum specific gravity. |
| Condenser | Exit temperature | Maximum temperature. |
| Carbon adsorber | Total regeneration steam flow or nitrogen flow, or pressure (gauge or absolute) a during carbon bed regeneration cycle; and temperature of the carbon bed after regeneration (and within 15 minutes of completing any cooling cycle(s)) | Maximum flow or pressure; and maximum temperature. |
| Other devices (or as an alternate to the requirements previously presented in this table) b | HAP concentration level or reading at outlet of device | Maximum HAP concentration or reading. |
a 25 to 50 mm (absolute) is a common pressure level obtained by pressure swing absorbers.
b Concentration is measured instead of an operating parameter.
[65 FR 38145, June 19, 2000]