---
kind: "section"
citation: "40 C.F.R. § 63.1037"
title: "40"
number: "63.1037"
heading: "Alternative means of emission limitation: Enclosed-vented process units or affected facilities."
url: "https://uscodex.org/cfr/40/63.1037"
---

# §63.1037. Alternative means of emission limitation: Enclosed-vented process units or affected facilities.

- (a) **Use of closed vent system and control device.** Process units or affected facilities or portions of process units at affected facilities enclosed in such a manner that all emissions from equipment leaks are vented through a closed vent system to a control device or routed to a fuel gas system or process meeting the requirements of [§ 63.1034](/cfr/40/63.1034.md) are exempt from the requirements of §§ [63.1025 through 63.1033](/cfr/40/63.1025..63.1033.md) and [63.1035](/cfr/40/63.1035.md). The enclosure shall be maintained under a negative pressure at all times while the process unit or affected facility is in operation to ensure that all emissions are routed to a control device.
- (b) **Recordkeeping.** Owners and operators choosing to comply with the requirements of this section shall maintain the records specified in [paragraphs (b)(1) through (b)(3)](#b-1..b-3) of this section.
  - (1) **Identification of the process unit(s) or affected facilities and the regulated materials they handle.**
  - (2) **A schematic of the process unit or affected facility, enclosure, and closed vent system.**
  - (3) A description of the system used to create a negative pressure in the enclosure to ensure that all emissions are routed to the control device.

## Notes

### Source

Source: 64 FR 34899, June 29, 1999, unless otherwise noted.

### Authority

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

### Source

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