49 CFR 193.2181
§ 193.2181 Impoundment capacity: LNG storage tanks.
United States · 49 CFR — Transportation · Status: effective
Cite this
- Citation
- 49 CFR 193.2181, § 193.2181 Impoundment capacity: LNG storage tanks, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/257334
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Full text
Each impounding system serving an LNG storage tank must have a minimum volumetric liquid impoundment capacity of:
(a) 110 percent of the LNG tank's maximum liquid capacity for an impoundment serving a single tank;
(b) 100 percent of all tanks or 110 percent of the largest tank's maximum liquid capacity, whichever is greater, for the impoundment serving more than one tank; or
(c) If the dike is designed to account for a surge in the event of catastrophic failure, then the impoundment capacity may be reduced to 100 percent in lieu of 110 percent.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.