Hazardous Waste Disposal and Waste Recycle

Waste Recyling Information

Gas Cylinders

Antifreeze is most commonly composed of ethylene glycol, with corrosion inhibitors and foam controllers added.  Some antifreeze is composed of propylene glycol because it is less toxic to humans and animals.  During use, antifreeze can pick up contaminants.  If dissolved metal levels, such as lead or cadmium, are high enough, used antifreeze may be hazardous waste.

Compressed gas cylinders are “empty” when the pressure regulator is on zero. Call your supplier for pickup.  If the supplier does not pick up empty cylinders, they will be treated as hazardous waste. Non-empty cylinders are also recycled as hazardous waste. See “CHEMICALS” for information on disposing of hazardous waste, or contact the EH&S Manager.

Contact the EH&S Office to coordinate pickup (x6291).

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If you have any questions contact the Environmental Health & Safety Office at (608) 246-6291 or via email

Comments regarding page to: EH&S Department
Last updated:  05/05/05