---
kind: "section"
citation: "40 C.F.R. § 63.7890"
title: "40"
number: "63.7890"
heading: "What emissions limitations and work practice standards must I meet for process vents?"
url: "https://uscodex.org/cfr/40/63.7890"
---

# §63.7890. What emissions limitations and work practice standards must I meet for process vents?

- (a) You must control HAP emissions from each new and existing process vent subject to [§ 63.7885(b)(1)](/cfr/40/63.7885.md?p=b-1) according to emissions limitations and work practice standards in this section that apply to your affected process vents.
- (b) For your affected process vents, you must meet one of the facility-wide emission limit options specified in [paragraphs (b)(1) through (4)](#b-1..b-4) of this section. If you have multiple affected process vent streams, you may comply with this paragraph using a combination of controlled and uncontrolled process vent streams that achieve the facility-wide emission limit that applies to you.
  - (1) Reduce from all affected process vents the total emissions of the HAP listed in Table 1 of this subpart to a level less than 1.4 kilograms per hour (kg/hr) and 2.8 Mg/yr (3.0 pounds per hour (lb/hr) and 3.1 tpy); or
  - (2) Reduce from all affected process vents the emissions of total organic compounds (TOC) (minus methane and ethane) to a level below 1.4 kg/hr and 2.8 Mg/yr (3.0 lb/hr and 3.1 tpy); or
  - (3) Reduce from all affected process vents the total emissions of the HAP listed in Table 1 of this subpart by 95 percent by weight or more; or
  - (4) Reduce from all affected process vents the emissions of TOC (minus methane and ethane) by 95 percent by weight or more.
- (c) For each closed vent system and control device you use to comply with [paragraph (b)](#b) of this section, you must meet the operating limit requirements and work practice standards in [§ 63.7925(c) through (j)](/cfr/40/63.7925.md?p=c..j) that apply to your closed vent system and control device.

## Notes

### Amendments

[68 FR 58190, Oct. 8, 2003, as amended at 71 FR 69017, Nov. 29, 2006]

### Source

Source: 68 FR 58190, Oct. 8, 2003, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.

### Amendments

[68 FR 58190, Oct. 8, 2003, as amended at 71 FR 69017, Nov. 29, 2006]