“Petroleum” is defined as crude oil, or any fraction thereof, that is liquid at 60°F at normal atmospheric pressure. This includes petroleum-based substances comprised of a complex blend of hydrocarbons.

 Common “petroleum” substances include: motor oil, hydraulic oil, gear oil, automatic transmission fluids (ATF), used oil, machine coolant, water-soluble coolant, gasoline, diesel, jet fuel, residual fuel oils, lubricants, petroleum solvents, and water/oil mixture.

"Petroleum" does not include antifreeze, liquid propane gas (LPG), acetone, and alcohol (i.e., ethanol, methanol, etc.).