Treated Wood Waste Disposal

Household wastes are excluded from Ecology's Dangerous Waste Regulations (the WAC).

Dispose of treated wood in your trash collection.
Do not burn treated wood in open fires or in stoves, fireplaces, or residential boilers because toxic chemicals may be produced as part of the smoke and ashes.
See Household Hazardous Waste or WAC 173-303-071(3)(c) of the Dangerous Waste Regulations to read the exclusion.

Example of Arsenic Warning Label

This label and similar safety labels from the American Wood Preservers Institute are required for CCA treated wood.

Treated wood from commercial or industrial sites may be managed so that it is exempt from the dangerous waste regulations (see the next section). If not exempt it needs to be designated, and if it is regulated then disposed as a dangerous waste.

Regulated treated wood wastes may be burned only in commercial or industrial incinerators or boilers in accordance with state and Federal regulations. Do not burn treated wood at the job site.