# Shared impoundment.

**Citation:** 49 CFR 193.2175  
**Type / status:** regulation / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 1999-10-01  
**Published:** Not stated

When an impounding system serves more than one LNG storage tank, a means must be provided to prevent low temperature or fire resulting from leakage from any one of the storage tanks served causing any other storage tank to leak. The means must not result in a vapor dispersion distance which exceeds 

## Document text

When an impounding system serves more than one LNG storage tank, a means must be provided to prevent low temperature or fire resulting from leakage from any one of the storage tanks served causing any other storage tank to leak. The means must not result in a vapor dispersion distance which exceeds the exclusion zone required by § 193.2059.

[Amdt. 193-1, 45 FR 57419, Aug. 28, 1980]

## Provenance

- Official: Yes
- Source: <https://www.govinfo.gov/app/details/CFR-1999-title49-vol3/CFR-1999-title49-vol3-sec193-2175>
- Source ID: `govinfo-cfr`
- SHA-256: `ce38ffe5ac6e4ca9c1ca484c7ba5029279234be4ded5731c32185a815972ca06`
- Retrieved: 2026-08-12T01:41:23.231Z
- Exported: 2026-08-23T05:50:01.413Z
- Document slug: `49-cfr-193-2175`

### Source metadata

```json
{
  "part": "193",
  "section": "193.2175",
  "subpart": "Subpart C—Design",
  "annualEdition": 1999,
  "revisedAsOf": "1999-10-01",
  "govInfoPackage": "CFR-1999-title49-vol3",
  "legalStatus": "official-annual-cfr-edition",
  "effectiveDateNote": null,
  "historicalAnchor": true,
  "historicalAnchorNote": "The section appears in an official annual CFR edition but is absent from the connected current eCFR corpus.",
  "jurisdiction": "US"
}
```