Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 63, Subpt. FFFF, Tbl. 1 Table 1 to Subpart FFFF of Part 63—Emission Limits and Work Practice Standards for 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.