Regulations last checked for updates: May 17, 2024

Title 40 - Protection of Environment last revised: May 15, 2024
Appendix - Table 3 to Subpart OOO of Part 63—Batch Process Vent Monitoring Requirements
Control device Parameters to be monitored Frequency/recordkeeping requirements
Scrubber apH of scrubber effluent, andContinuous records as specified in § 63.1416(d). b
Scrubber liquid and gas flow ratesContinuous records as specified in § 63.1416(d). b
Absorber aExit temperature of the absorbing liquid, andContinuous records as specified in § 63.1416(d). b
Exit specific gravity for the absorbing liquidContinuous records as specified in § 63.1416(d). b
Condenser aExit (product side) temperatureContinuous records as specified in § 63.1416(d). a
Carbon adsorber aTotal regeneration steam flow or nitrogen flow, or pressure (gauge or absolute) during carbon bed regeneration cycle(s), andRecord the total regeneration steam flow or nitrogen flow, or pressure for each carbon bed regeneration cycle.
Temperature of the carbon bed after regeneration and within 15 minutes of completing any cooling cycle(s)Record the temperature of the carbon bed after each regeneration and within 15 minutes of completing any cooling cycle(s).
Thermal incineratorFirebox temperature cContinuous records as specified in § 63.1416(d). b
Catalytic incineratorTemperature upstream and downstream of the catalyst bedContinuous records as specified in § 63.1416(d). b
Boiler or process heater with a design heat input capacity less than 44 megawatts and where the batch process vents or aggregate batch vent streams are not introduced with or used as the primary fuelFirebox temperature cContinuous records as specified in § 63.1416(d). b
FlarePresence of a flame at the pilot lightHourly records of whether the monitor was continuously operating during batch emission episodes, or portions thereof, selected for control and whether a flame was continuously present at the pilot light during said periods.
All control devicesDiversion to the atmosphere from the control device orHourly records of whether the flow indicator was operating during batch emission episodes, or portions thereof, selected for control and whether a diversion was detected at any time during said periods as specified in § 63.1416(d).
Monthly inspections of sealed valvesRecords that monthly inspections were performed as specified in § 63.1416(d).
Scrubber, absorber, condenser, and carbon adsorber (as an alternative to the requirements previously presented in this table)Concentration level or reading indicated by an organic monitoring device at the outlet of the control deviceContinuous records as specified in § 63.1416(d). b

a Alternatively, these devices may comply with the organic monitoring device provisions listed at the end of this table.

b “Continuous records” is defined in § 63.111.

c Monitor may be installed in the firebox or in the ductwork immediately downstream of the firebox before any substantial heat exchange is encountered.

authority: 42 U.S.C. 7401
source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.