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.
Household wastes are excluded from Ecology's Dangerous Waste Regulations.
This label and similar safety labels from the American Wood Preservers Institute are required for CCA treated wood.
Regulated treated wood wastes may be burned in commercial or industrial incinerators or boilers in accordance with state and Federal regulations. Never burn treated wood at the job site.
Focus on Treated Wood Exclusion is an Ecology publication that clarifies the disposal and recycling options for arsenic-, pentachlorophenol-, and creosote-treated wood.
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.htm