MSHA - Code of Federal Regulations - 30 CFR 57.4401
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MSHA - Title 30 CFR
30 CFR § 57.4401
Storage tank foundations.


Fixed, unburied, flammable or combustible liquid storage tanks shall be securely mounted on firm foundations. Piping shall be provided with flexible connections or other special fittings where necessary to prevent leaks caused by tanks settling.