---
kind: "range"
citation: "40 C.F.R. §§ 63.7890–63.7893"
title: "40"
from: "63.7890"
to: "63.7893"
count: 4
url: "https://uscodex.org/cfr/40/63.7890..63.7893"
---

# §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.

# §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).

# §63.7892. What are my inspection and monitoring requirements for process vents?


For each closed vent system and control device you use to comply with [§ 63.7890(b)](/cfr/40/63.7890.md?p=b), you must monitor and inspect the closed vent system and control device according to the requirements in [§ 63.7927](/cfr/40/63.7927.md) that apply to you.


# §63.7893. How do I demonstrate continuous compliance with the emissions limitations and work practice standards for process vents?

- (a) You must demonstrate continuous compliance with the emissions limitations and work practice standards in [§ 63.7890](/cfr/40/63.7890.md) applicable to your affected process vents by meeting the requirements in [paragraphs (b) through (d)](#b..d) of this section.
- (b) You must maintain emission levels from all of your affected process vents to meet the facilitywide emission limits in [§ 63.7890(b)](/cfr/40/63.7890.md?p=b) that apply to you, as specified 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 maintain 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 maintain 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 maintain 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 maintain 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 continuous compliance with the emission limitations and work practice standards for a closed vent system and control device in [§ 63.7928](/cfr/40/63.7928.md).
- (d) Keeping records to document continuous compliance with the requirements of this subpart according to the requirements in [§ 63.7952](/cfr/40/63.7952.md).