40 CFR Table 13 to Subpart G of Part 63
Wastewater—Monitoring Requirements for Control Devices
June 9, 2020
Open Table
| Control Device | Monitoring equipment required | Parameters to be monitored | Frequency |
|---|---|---|---|
| All control devices | 1. Flow indicator installed at all bypass lines to the atmosphere and equipped with continuous recorderbor | 1. Presence of flow diverted from the control device to the atmosphere or | Hourly records of whether the flow indicator was operating and whether a diversion was detected at any time during each hour |
| 2. Valves sealed closed with car-seal or lock-and-key configuration | 2. Monthly inspections of sealed valves | Monthly. | |
| Thermal Incinerator | Temperature monitoring device installed in firebox or in ductwork immediately downstream of fireboxa and equipped with a continuous recorderb | Firebox temperature | Continuous. |
| Catalytic Incinerator | Temperature monitoring device installed in gas stream immediately before and after catalyst bed and equipped with a continuous recorderb | 1. Temperature upstream of catalyst bed or 2. Temperature difference across catalyst bed |
Continuous. |
| Flare | Heat sensing device installed at the pilot light and equipped with a continuous recordera | Presence of a flame at the pilot light | Hourly records of whether the monitor was continuously operating and whether the pilot flame was continuously present during each hour. |
| Boiler or process heater <44 megawatts and vent stream is not mixed with the primary fuel | Temperature monitoring device installed in fireboxa and equipped with continuous recorderb | Combustion temperature | Continuous. |
| Condenser | Temperature monitoring device installed at condenser exit and equipped with continuous recorderb | Condenser exit (product side) temperature | Continuous. |
| Carbon adsorber (regenerative) | Integrating regeneration stream flow monitoring device having an accuracy of ±10 percent, and | Total regeneration stream mass or volumetric flow during carbon bed regeneration cycle(s) | For each regeneration cycle, record the total regeneration stream mass or volumetric flow. |
| Carbon bed temperature monitoring device | Temperature of carbon bed after regeneration [and within 15 minutes of completing any cooling cycle(s)] | For each regeneration cycle and within 15 minutes of completing any cooling cycle, record the carbon bed temperature. | |
| Carbon adsorber (Non-regenerative) | Organic compound concentration monitoring device.c | Organic compound concentration of adsorber exhaust | Daily or at intervals no greater than 20 percent of the design carbon replacement interval, whichever is greater. |
| Alternative monitoring parameters | Other parameters may be monitored upon approval from the Administrator in accordance with the requirements in §63.143(e)(3) |
aMonitor may be installed in the firebox or in the ductwork immediately downstream of the firebox before any substantial heat exchange is encountered.
b“Continuous recorder” is defined in §63.111 of this subpart.
cAs an alternative to conducting this monitoring, an owner or operator may replace the carbon in the carbon adsorption system with fresh carbon at a regular predetermined time interval that is less than the carbon replacement interval that is determined by the maximum design flow rate and organic concentration in the gas stream vented to the carbon adsorption system.
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