Tank
Tank means any stationary device, designed to contain an accumulation of used oil which is constructed primarily of non-earthen materials, (e.g., wood, concrete, steel, plastic) which provides structural support.
Source
40 CFR § 279.1
Scoping language
Terms that are defined in 260.10, 261.1, and 280.12 of this chapter have the same meanings when used in this part.