Assembly Bill 332 (Committee on Environmental Safety and Toxic
Materials, Chapter 147, Statute of 2021), which
CSAC supported, allowed treated wood waste (TWW) to be
managed under alternative management standards (AMS) instead of
as a hazardous waste. The Western Wood Preservers Institute
developed the TWWDisposal.org website with
resources on appropriate handling, storage, labeling, transport,
notifications, recordkeeping, reuse, and disposal. AB 332
requires updating the educational materials annually for
landfills and generators. You can find the updated materials
here:
Treated wood is commonly used as a building material in many
construction, agricultural, and aquatic settings, as it has been
specifically treated with preservatives to resist decay related
to moisture, pests, and exposure to the environment. Because TWW
contains hazardous chemicals, it must be carefully managed and
disposed.
