---
kind: "section"
citation: "40 C.F.R. § 63.1016"
title: "40"
number: "63.1016"
heading: "Alternative means of emission limitation: Enclosed-vented process units."
url: "https://uscodex.org/cfr/40/63.1016"
---

# §63.1016. Alternative means of emission limitation: Enclosed-vented process units.

- (a) **Use of closed vent system and control device.** Process units of affected facilities or portions of process units of affected facilities enclosed in such a manner that all emissions from equipment leaks are routed to a process or fuel gas system or collected and vented through a closed vent system to a control device meeting the requirements of either [§ 63.1015](/cfr/40/63.1015.md) or [§ 63.1002(b)](/cfr/40/63.1002.md?p=b) are exempt from the requirements of [§§ 63.1006 through 63.1014](/cfr/40/63.1006..63.1014.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 34886, 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.