Waste oil fuel tank(s) may contain: 1 and 2 fuel oils; crankcase oil up to 50 SAE; automatic transmission fluid; and hydraulic oils; and specified refined waste fuels only.
Other types of liquids such as anti-freeze, cleaners, thinners, solvents, gasoline or additives, and any other types of hazardous materials shall not be introduced into a waste oil supply tank.
02-658 C.M.R. ch. 11, § 15