# Structural Requirements [49 CFR 193.2155]

- **operation:** document
- **citation:** LAC 43:XIII §7155
- **title:** Structural Requirements [49 CFR 193.2155]
- **source type:** regulation
- **agency:** Louisiana Office of Conservation
- **status:** current
- **official:** true
- **published on:** Not available
- **effective on:** Not available
- **summary:** A. The structural members of an impoundment system must be designed and constructed to prevent impairment of the system's performance reliability and structural integrity as a result of the following: 1. the imposed loading from: a. full hydrostatic head of impounded LNG; [49 CFR 193.2155(a)(1)(i)] 
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**body:**

A. The structural members of an impoundment system must be designed and constructed to prevent impairment of the system's performance reliability and structural integrity as a result of the following:

1. the imposed loading from:

a. full hydrostatic head of impounded LNG; [49 CFR 193.2155(a)(1)(i)]

b. hydrodynamic action, including the effect of any material injected into the system for spill control; [49 CFR 193.2155(a)(1)(ii)]

c. the impingement of the trajectory of an LNG jet discharged at any predictable angle; and [49 CFR 193.2155(a)(1)(iii)]

d. anticipated hydraulic forces from a credible opening in the component or item served, assuming that the discharge pressure equals design pressure; [49 CFR 193.2155(a)(1)(iv)]

2. the erosive action from a spill, including jetting of spilling LNG, and any other anticipated erosive action including surface water runoff, ice formation, dislodgement of ice formation, and snow removal; [49 CFR 193.2155(a)(2)]

3. the effect of the temperature, any thermal gradient, and any other anticipated degradation resulting from sudden or localized contact with LNG; [49 CFR 193.2155(a)(3)]

4. exposure to fire from impounded LNG or from sources other than impounded LNG; [49 CFR 193.2155(a)(4)]

5. if applicable, the potential impact and loading on the dike due to:

a. of the component or item served or adjacent components; and [49 CFR 193.2155(a)(5)(i)]

b. the LNG facility adjoins the right-of-way of any highway or railroad, collision by or explosion of a train, tank car, or tank truck that could reasonably be expected to cause the most severe loading. [49 CFR 193.2155(a)(b)(ii)]

B. An LNG storage tank must not be located within a horizontal distance of one mile (1.6 km) from the ends, or 1/4 mile (0.4 km) from the nearest point of a runway, whichever is longer. The height of LNG structures in the vicinity of an airport must also comply with Federal Aviation Administration requirements in 14 CFR Section 1.1. [49 CFR 193.2155(b)]

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:551.C.

HISTORICAL NOTE: Promulgated by the Department of Natural Resources, Office of Conservation, LR 44:1051 (June 2018).
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