40 CFR Table 5
Operating Parameters, Operating Limits and Data Monitoring, Recording and Compliance Frequencies for Process Vents
June 9, 2020
Open Table
| For these control devices, you must monitor these operating parameters . . . | Establish the following operating limit during your initial performance test . . . |
Monitor, record, and demonstrate continuous compliance using these minimum frequencies |
||
|---|---|---|---|---|
| Data measurement | Data recording | Data averaging period for compliance | ||
| Process Vents | ||||
| Any Control device | ||||
| Flow to/from the control device | N/A | Continuous | N/A | Date and time of flow start and stop. |
| Thermal Oxidizers | ||||
| Temperature (in fire box or downstream ductwork prior to heat exchange) | Minimum temperature | Continuous | Every 15 minutes | 3-hour block average. |
| Temperature differential across catalyst bed | Minimum temperature differential | Continuous | Every 15 minutes | 3-hour block average. |
| Inlet temperature to catalyst bed and catalyst condition | Minimum inlet temperature and catalyst condition as specified in 63.11940 (b)(3) | Continuous for temperature, annual for catalyst condition | Every 15 minutes for temperature, annual for catalyst condition | 3-hour block average for temperature, annual for catalyst condition. |
| Absorbers and Acid Gas Scrubbers | ||||
| Influent liquid flow | Minimum inlet liquid flow | Continuous | Every 15 minutes | 3-hour block average. |
| Influent liquid flow and gas stream flow | Minimum influent liquid flow to gas stream flow ratio | Continuous | Every 15 minutes | 3-hour block average. |
| Pressure drop | Minimum pressure drop | Continuous | Every 15 minutes | 3-hour block average. |
| Exhaust gas temperature | Maximum exhaust gas temperature | Continuous | Every 15 minutes | 3-hour block average. |
| Change in specific gravity of scrubber liquid | Minimum change in specific gravity | Continuous | Every 15 minutes | 3-hour block average. |
| pH of effluent liquid | Minimum pH | Continuous | Every 15 minutes | 3-hour block average. |
| Causticity of effluent liquid | Minimum causticity | Continuous | Every 15 minutes | 3-hour block average. |
| Conductivity of effluent liquid | Minimum conductivity | Continuous | Every 15 minutes | 3-hour block average. |
| Regenerative Adsorber | ||||
| Regeneration stream flow. | Minimum total flow per regeneration cycle | Continuous | N/A | Total flow for each regeneration cycle. |
| Adsorber bed temperature. | Maximum temperature | Continuously after regeneration and within 15 minutes of completing any temperature regulation | Every 15 minutes after regeneration and within 15 minutes of completing any temperature regulation | 3-hour block average. |
| Adsorber bed temperature. | Minimum temperature | Continuously during regeneration except during any temperature regulating portion of the regeneration cycle | N/A | Average of regeneration cycle. |
| Vacuum and duratio of regeneration | Minimum vacuum and period of time for regeneration | Continuous | N/A | Average vacuum and duration of regeneration. |
| Regeneration frequency | Minimum regeneration frequency and duration | Continuous | N/A | Date and time of regeneration start and stop. |
| Adsorber operation valve sequencing and cycle time | Correct valve sequencing and minimum cycle time | Daily | Daily | N/A. |
| Non-Regenerative Adsorber | ||||
| Average adsorber bed life. | N/A | Daily until breakthrough for 3 adsorber bed change-outs | N/A | N/A. |
| Outlet VOC concentration of the first adsorber bed in series | Limits in Table 1 or 2 of this subpart | Daily, except monthly (if more than 2 months bed life remaining) or weekly (if more than 2 weeks bed life remaining) | N/A | Daily, weekly, or monthly. |
| Condenser | ||||
| Temperature | Maximum outlet temperature | Continuous | Every 15 minutes | 3-hour block average. |
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