Each LNG storage tank must be inspected or tested to verify that each of the following conditions does not impair the structural integrity or safety of the tank:

1. (a) Foundation and tank movement during normal operation and after a major meteorological or geophysical disturbance.
2. (b) Inner tank leakage.
3. (c) Effectiveness of insulation.
4. (d) Frost heave.

[Amdt. 193-2, 45 FR 70407, Oct. 23, 1980, as amended at 47 FR 32720, July 29, 1982]