30 CFR § 57.4460 Storage of flammable liquids underground.
(a) Flammable liquids shall not be stored underground, except--
(1) Small quantities stored in tightly closed cabinets
away from any heat source. The small quantities shall be stored in safety
cans or in non-glass containers of a capacity equal to or less than a safety
can. Each cabinet shall be labeled "flammables."
(2) Acetylene and liquefied petroleum gases stored in
containers designed for that specific purpose.
