- Table 1 to Subpart FFFF of Part 63—Emission Limits and Work Practice Standards for Continuous Process Vents
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:
| 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 § 63.2450(e)(4) and 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 § 63.2450(e)(4) and the requirements in § 63.993 and the requirements referenced therein. | 5. Continuous process vent | Beginning no later than the compliance dates specified in § 63.2445(i), the continuous process vent contains ethylene oxide such that it is considered to be in ethylene oxide service as defined in § 63.2550 | Comply with the applicable emission limits specified in items 1 through 4 of this Table, and also:
i. Reduce emissions of ethylene oxide by venting emissions through a closed-vent system to a flare; or ii. Reduce emissions of ethylene oxide by venting emissions through a closed-vent system to a control device that reduces ethylene oxide by ≥99.9 percent by weight, or to a concentration <1 ppmv for each process vent or to <5 pounds per year for all combined process vents. |
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