LAC 43:XIII.7181. Impoundment Capacity: LNG Storage Tanks [49 CFR 193.2181]

A. Each impounding system serving an LNG storage tank must have a minimum volumetric liquid impoundment capacity of: 1. 110 percent of the LNG tank's maximum liquid capacity for an impoundment serving a single tank; [49 CFR 193.2181(a)] 2. 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 [49 CFR 193.2181(b)] 3. 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. [49 CFR 193.2181(b)]