30 CFR 57.4104 - Combustible waste.
(a) Waste materials, including liquids, shall not accumulate in quantities that could create a fire hazard.
(b) Waste or rags containing flammable or combustible liquids that could create a fire hazard shall be placed in the following containers until disposed of properly:
Title 30 published on 2013-07-01
no entries appear in the Federal Register after this date.