Processing
Processing means chemical or physical operations designed to produce from used oil, or to make used oil more amenable for production of, fuel oils, lubricants, or other used oil-derived product. Processing includes, but is not limited to: blending used oil with virgin petroleum products, blending used oils to meet the fuel specification, filtration, simple distillation, chemical or physical separation and re-refining.
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.