---
kind: "section"
citation: "40 C.F.R. § 63.7891"
title: "40"
number: "63.7891"
heading: "How do I demonstrate initial compliance with the emissions limitations and work practice standards for process vents?"
url: "https://uscodex.org/cfr/40/63.7891"
---

# §63.7891. How do I demonstrate initial compliance with the emissions limitations and work practice standards for process vents?

- (a) You must demonstrate initial compliance with the emissions limitations and work practice standards in [§ 63.7890(b)](/cfr/40/63.7890.md?p=b) applicable to your affected process vents by meeting the requirements in [paragraphs (b) through (d)](#b..d) of this section.
- (b) You have measured or determined using the procedures for performance tests and design evaluations in [§ 63.7941](/cfr/40/63.7941.md) that emission levels from all of your affected process vents meet the facility-wide emission limits in [§ 63.7890(b)](/cfr/40/63.7890.md?p=b) that apply to you, as follows in [paragraphs (b)(1) through (4)](#b-1..b-4) of this section.
  - (1) If you elect to meet [§ 63.7890(b)(1)](/cfr/40/63.7890.md?p=b-1), you demonstrate that the total emissions of the HAP listed in Table 1 of this subpart from all affected process vents at your facility are less than 1.4 kg/hr and 2.8 Mg/yr (3.0 lb/hr and 3.1 tpy).
  - (2) If you elect to meet [§ 63.7890(b)(2)](/cfr/40/63.7890.md?p=b-2), you demonstrate that emissions of TOC (minus methane and ethane) from all affected process vents at your facility are less than 1.4 kg/hr and 2.8 Mg/yr (3.0 lb/hr and 3.1 tpy).
  - (3) If you elect to meet [§ 63.7890(b)(3)](/cfr/40/63.7890.md?p=b-3), you demonstrate that the total emissions of the HAP listed in Table 1 of this subpart from all affected process vents are reduced by 95 percent by weight or more.
  - (4) If you elect to meet [§ 63.7890(b)(4)](/cfr/40/63.7890.md?p=b-4), you demonstrate that the emissions of TOC (minus methane and ethane) from all affected process vents are reduced by 95 percent by weight or more.
- (c) For each closed vent system and control device you use to comply with [§ 63.7890(b)](/cfr/40/63.7890.md?p=b), you have met each requirement for demonstrating initial compliance with the emission limitations and work practice standards for a closed vent system and control device in [§ 63.7926](/cfr/40/63.7926.md).
- (d) You have submitted a notification of compliance status according to the requirements in [§ 63.7950](/cfr/40/63.7950.md).

## Notes

### 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.