California Alternative Management Standards for TWW

AMS for Treated Wood

The state of California requires that wood waste that has been preservative treated must be disposed per the regulations in the Alternative Management Standards (AMS) for Treated Wood. While the AMS has been in place for nearly three decades, it was reaffirmed by passage of AB 332 in 2021.

The AMS for Treated Wood details the specific requirement for safe disposal of Treated Wood Waste (TWW). The requirements include accumulation and storage practices, transport and tracking, labeling, record keeping and approved landfills for disposing TWW. The AMS also lists prohibited activities for TWW, such as burning and commingling with other waste.

For additional information on the AMS for Treated Wood, review the following websites: