# Shared impoundment.

- **operation:** document
- **citation:** 49 CFR 193.2175
- **title:** Shared impoundment.
- **source type:** regulation
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** Not available
- **effective on:** 1999-10-01
- **summary:** 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 
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- **markdown:** https://regulus.evalyn.ai/document/49-cfr-193-2175.md
- **app url:** https://regulus.evalyn.ai/document/49-cfr-193-2175
- **source url:** https://www.govinfo.gov/app/details/CFR-1999-title49-vol3/CFR-1999-title49-vol3-sec193-2175
**body:**

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]
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- **body characters:** 385