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Used oil filters may be brought to many service stations or point - of - purchase establishments for recycling.

DISPOSAL: Oil filters should be punctured on the dome end and allowed to "hot-drain" for 12 to 24 hours. Hot draining is simply draining the filters immediately after taking them off a hot engine. Crushing the filter after this process will remove even more oil. After draining, the filters should be stored in a sealed, labeled container. Many recycling operators will provide you with these storage containers. If recycling is not a viable option, drained filters may be landfilled as a nonhazardous waste.

For more information CONTACT:

Environment Canada: Department of Environment:



  • Copper chromium arsenate (CCA)
  • Pentachlorophenol
  • Creosote
  • Some paints/varnishes


There are 3 broad categories of wood preservatives currently in use: creosote, oil-based chemicals, and water-based chemicals. Wood preservatives are found in pressure - treated wood and applied to wood to create a long - lasting building material used in decks, fences, docks, railway ties and elsewhere. The wood preservative protects against rot, insect attack or other forms of bio-deterioration. Some paints and varnishes may also be used as a wood preservative.


Creosote, used mainly in railway ties, is composed of polyaromatic hydrocarbons (PAH's) which are highly carcinogenic. Skin contact with the preservative should be avoided. Creosote exposure in combination with UV radiation may cause health problems ranging from eczema to an increase in skin cancer risk.

The most common oil-based preservative is pentachlorophenol, used mainly in treating utility poles and bridge timbers. It has been shown to cause birth defects and fetal damage, among other health problems.

Water-based chemicals such as copper chromium arsenate (CCA) are applied in pressure treatment of wood products. They are commonly used on wood fencing, play ground equipment, animal enclosures and decks. CCA contains arsenic and is poisonous to humans if absorbed by the skin, or ingested. Some studies have shown that small amounts of arsenic can leach into the surrounding soil. Copper and chromium can be toxic to terrestrial and aquatic life.

Creosote, pentachlorophenol, and CCA are all considered safe if they remain fixed in the wood.



Do dispose of small quantities of treated wood to a landfill.

Don't burn treated wood. Harmful, toxic chemicals will be released to create air pollution. Creosote treated wood must never be burned in wood stoves or furnaces.

Do salvage and reuse the wood in another application.

Don't use treated wood in any applications where food may be exposed (i.e. cutting boards).

Do seal treated wood every few years with a waterproof sealant to reduce leaching of wood preservative.

Don't use acid deck wash or brighteners with CCA as these may accelerate the release of arsenic from the wood.

Do take precautions when cleaning up after a CCA fire. Remember that the ash is highly toxic. Wear protective clothing and use preventive measures to avoid direct exposure or contact.

Don't come into contact with sawdust when sawing treated wood. Wear gloves and face shield. Try to chip or saw the wood in a well ventilated area.


Currently there are no recycling opportunities for wood preservatives. Try to reuse old wood for new projects or offer to others that may reuse such materials.


Reuse or landfilling are currently the only option for disposal of treated wood wastes. Residual liquid waste should be treated as hazardous and should be taken to household hazardous waste days. Large volumes may be collected by licensed hazardous waste transporters. Contact local listings in your region.

For more information CONTACT:

Environmental Protection Agency:

Multi Material Stewardship Board (MMSB):

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