Code of Federal Regulations > Title 40 > Chapter I > Part 63 > Subpart AA > Appendix - Table 4 to Subpart AA of Part 63—Operating Parameters, Operating Limits and Data Monitoring, Recordkeeping and Compliance Frequencies

Regulations last checked for updates: May 16, 2024

Title 40 - Protection of Environment last revised: May 14, 2024

Appendix - Table 4 to Subpart AA of Part 63—Operating Parameters, Operating Limits and Data Monitoring, Recordkeeping and Compliance Frequencies

For the operating parameter applicable to you, as specified in Table 3 . . .	You must establish the following operating limit . . .	And you must monitor, record, and demonstrate continuous compliance using these minimum frequencies . . .
	You must establish the following operating limit . . .	Data measurement	Data recording	Data averaging period for compliance
Absorbers (Wet Scrubbers)
Influent liquid flow	Minimum inlet liquid flow	Continuous	Every 15 minutes	Daily.
Influent liquid flow rate and gas stream flow rate	Minimum influent liquid-to-gas ratio ^a	Continuous	Every 15 minutes	Daily.
Pressure drop	Pressure drop range	Continuous	Every 15 minutes	Daily.
Sorbent Injection
Sorbent injection rate	Minimum injection rate	Continuous	Every 15 minutes	Daily.
Sorbent injection carrier gas flow rate	Minimum carrier gas flow rate	Continuous	Every 15 minutes	Daily.
Fabric Filters
Alarm time	Maximum alarm time is not established on a site-specific basis but is specified in § 63.605(f)(9)	Continuous	Each date and time of alarm start and stop	Maximum alarm time specified in § 63.605(f)(9).
Wet Electrostatic Precipitator
Secondary voltage	Secondary voltage range	Continuous	Every 15 minutes	Daily.

^a If you select the regression model option to monitor influent liquid-to-gas ratio as described in Table 3 to this subpart, then you must also continuously monitor (i.e., record every 15 minutes, and use a daily averaging period) blower amperage, blower static pressure (i.e., fan suction pressure), and any other parameters used in the regression model that are not constants.

authority: 42 U.S.C. 7401

source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.