40 CFR Table 7 to Subpart U of Part 63
Operating Parameters for Which Monitoring Levels Are Required To Be Established for Continuous and Batch Front-End Process Vents and Aggregate Batch Vent Streams
June 9, 2020
Open Table
| Control/recovery 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 [§63.489(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 above)b | HAP concentration level or reading at outlet of device | Maximum HAP concentration or reading. |
a25 to 50 mm (absolute) is a common pressure level obtained by pressure swing absorbers.
bConcentration is measured instead of an operating parameter.
[65 FR 38093, June 19, 2000]
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