Treated wood waste is wood that has been treated with chemical preservatives to help protect the wood from insect attack and fungal decay while it is being used. Grape stakes, utility poles, railroad ties, fence posts, sill plates, landscape timbers, pilings, guardrails, and decking are all examples of chemically treated wood.
Health and Safety Code (HSC) 25150.7 and California Code of Regulations, title 22 (22 CCR) 67386.1 et seq. that allow treated wood waste to be handled with alternative management standards are due to expire after December 31, 2020. After that date, all hazardous treated wood waste managed in California will have to be stored and manifested as hazardous waste and transported to Class I hazardous waste landfills for disposal.
For more information on treated wood waste management and disposal guidelines please click here.