{"data":{"id":"us/49-cfr-193.2181","jurisdiction":"us","citation":"49 CFR 193.2181","heading":"Impoundment capacity: LNG storage tanks.","body":"Each impounding system serving an LNG storage tank must have a minimum volumetric liquid impoundment capacity of:\n(a) 110 percent of the LNG tank's maximum liquid capacity for an impoundment serving a single tank;\n(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\n(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.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER D—PIPELINE SAFETY","PART 193—LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS","Subpart C—Design"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"90502ec9e61735afa9eeafa54ec46db98c20e1b10467fe1d18a0941625db5811","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-193.2175-193.2179","next":"us/49-cfr-193.2183-193.2185"},"notice":"GroundRules: Original legal text. Not legal advice."}