40 CFR Table 2
Emission Limits and Work Practice Standards for Batch Process Vents
June 9, 2020
As required in §63.2460, you must meet each emission limit and work practice standard in the following table that applies to your batch process vents:
Open Table
| For each . . . | Then you must . . . | And you must . . . |
|---|---|---|
| 1. Process with Group 1 batch process vents | a. Reduce collective uncontrolled organic HAP emissions from the sum of all batch process vents within the process by ≥98 percent by weight by venting emissions from a sufficient number of the vents through one or more closed-vent systems to any combination of control devices (except a flare); or | Not applicable. |
| b. Reduce collective uncontrolled organic HAP emissions from the sum of all batch process vents within the process by ≥95 percent by weight by venting emissions from a sufficient number of the vents through one or more closed-vent systems to any combination of recovery devices or a biofilter, except you may elect to comply with the requirements of subpart WW of this part for any process tank; or | Not applicable. | |
| c. Reduce uncontrolled organic HAP emissions from one or more batch process vents within the process by venting through a closed-vent system to a flare or by venting through one or more closed-vent systems to any combination of control devices (excluding a flare) that reduce organic HAP to an outlet concentration ≤20 ppmv as TOC or total organic HAP. | For all other batch process vents within the process, reduce collective organic HAP emissions as specified in item 1.a and/or item 1.b of this table. | |
| 2. Halogenated Group 1 batch process vent for which you use a combustion device to control organic HAP emissions | a. Use a halogen reduction device after the combustion control device; or | i. Reduce overall emissions of hydrogen halide and halogen HAP by ≥99 percent; or ii. Reduce overall emissions of hydrogen halide and halogen HAP to ≤0.45 kg/hr; or iii. Reduce overall emissions of hydrogen halide and halogen HAP to a concentration ≤20 ppmv. |
| b. Use a halogen reduction device before the combustion control device | Reduce the halogen atom mass emission rate to ≤0.45 kg/hr or to a concentration ≤20 ppmv. |
[68 FR 63888, Nov. 10, 2003, as amended at 71 FR 40339, July 14, 2006]
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