---
kind: "section"
citation: "40 C.F.R. § 63.766"
title: "40"
number: "63.766"
heading: "Storage vessel standards."
url: "https://uscodex.org/cfr/40/63.766"
---

# §63.766. Storage vessel standards.

- (a) This section applies to each storage vessel with the potential for flash emissions (as defined in [§ 63.761](/cfr/40/63.761.md)) subject to this subpart.
- (b) The owner or operator of a storage vessel with the potential for flash emissions (as defined in [§ 63.761](/cfr/40/63.761.md)) shall comply with one of the control requirements specified in paragraphs [(b)(1)](#b-1) and [(2)](#b-2) of this section.
  - (1) The owner or operator shall equip the affected storage vessel with the potential for flash emissions with a cover that is connected, through a closed-vent system that meets the conditions specified in [§ 63.771(c)](/cfr/40/63.771.md?p=c), to a control device or a combination of control devices that meets any of the conditions specified in [§ 63.771(d)](/cfr/40/63.771.md?p=d). The cover shall be designed and operated in accordance with the requirements of [§ 63.771(b)](/cfr/40/63.771.md?p=b).
  - (2) The owner or operator of a pressure storage vessel that is designed to operate as a closed system shall operate the storage vessel with no detectable emissions at all times that material is in the storage vessel, except as provided for in [paragraph (c)](#c) of this section.
  - (3) The owner or operator shall control air emissions by connecting the cover, through a closed-vent system that meets the conditions specified in [§ 63.771(c)](/cfr/40/63.771.md?p=c), to a process natural gas line.
- (c) One or more safety devices that vent directly to the atmosphere may be used on the storage vessel and air emission control equipment complying with paragraphs [(b)(1)](#b-1) and [(2)](#b-2) of this section.
- (d) This section does not apply to storage vessels for which the owner or operator is subject to and controlled under the requirements specified in [40 CFR part 60](/cfr/40/part60.md), subparts [Kb](/cfr/40/subpartKb.md) or [OOOO](/cfr/40/subpartOOOO.md); or is subject to and controlled under the requirements specified under [40 CFR part 63](/cfr/40/part63.md) [subparts G](/cfr/40/subpartG.md) or CC. Storage vessels subject to and controlled under [40 CFR part 60](/cfr/40/part60.md), [subpart OOOO](/cfr/40/subpartOOOO.md) shall submit the periodic reports specified in [§ 63.775(e)](/cfr/40/63.775.md?p=e).

## Notes

### Amendments

[64 FR 32628, June 17, 1999, as amended at 77 FR 49571, Aug. 16, 2012]

### Source

Source: 64 FR 32628, June 17, 1999, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[64 FR 32628, June 17, 1999, as amended at 77 FR 49571, Aug. 16, 2012]