It appears OSHA is getting serious about 1910.106(e)(2)(ii)(b)…
1910.106(e)(2)(ii) “Containers.” flammable liquids shall be stored in tanks or closed containers.
1910.106(e)(2)(ii)(a) Except as provided in subdivisions (b) and (c) of this subdivision, all storage shall comply with paragraph (d) (3) or (4) of this section.
1910.106(e)(2)(ii)(b) The quantity of liquid that may be located outside of an inside storage room or storage cabinet in a building or in any one fire area of a building shall not exceed: