40 CFR Appendix Table 4 to Subpart OOO of Part 63 - Table 4 to Subpart OOO of Part 63—Operating Parameter Levels

Device	Parameters to be monitored	Established operating parameter(s)
Scrubber	pH of scrubber effluent; and scrubber liquid and gas flow rates	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 absorber	Total regeneration steam 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
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
Other devices (or as an alternate to the requirements previously presented in this table) b	Organic HAP concentration level or reading at outlet of device	Maximum organic 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.