40 CFR Table 1
Emission Limits and Work Practice Standards for Continuous Process Vents
June 9, 2020
As required in §63.2455, you must meet each emission limit and work practice standard in the following table that applies to your continuous process vents:
Open Table
| For each . . . | For which . . . | Then you must . . . |
|---|---|---|
| 1. Group 1 continuous process vent | a. Not applicable | i. Reduce emissions of total organic HAP by ≥98 percent by weight or to an outlet process concentration ≤20 ppmv as organic HAP or TOC by venting emissions through a closed-vent system to any combination of control devices (except a flare); or |
| ii. Reduce emissions of total organic HAP by venting emissions through a closed vent system to a flare; or | ||
| iii. Use a recovery device to maintain the TRE above 1.9 for an existing source or above 5.0 for a new source. | ||
| 2. Halogenated Group 1 continuous process vent stream | a. You use a combustion control device to control organic HAP emissions | i. Use a halogen reduction device after the combustion device to reduce emissions of hydrogen halide and halogen HAP by ≥99 percent by weight, or to ≤0.45 kg/hr, or to ≤20 ppmv; or ii. Use a halogen reduction device before the combustion device to reduce the halogen atom mass emission rate to ≤0.45 kg/hr or to a concentration ≤20 ppmv. |
| 3. Group 2 continuous process vent at an existing source | You use a recovery device to maintain the TRE level >1.9 but ≤5.0 | Comply with the requirements in §63.993 and the requirements referenced therein. |
| 4. Group 2 continuous process vent at a new source | You use a recovery device to maintain the TRE level >5.0 but ≤8.0 | Comply with the requirements in §63.993 and the requirements referenced therein. |
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