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Treated Wood Waste (TWW)

TWW is Banned from All Municipal Landfills (CLASS III) - including Johnson Canyon Landfill

TWW is considered hazardous waste and is now only accepted at Hazardous Waste Landfills (Class I) that manage the most toxic materials.

What is Treated Wood Waste?

TWW comes from wood that has been treated with chemical preservatives. These chemicals help protect the wood from insect attack and fungal decay while it’s being used. Fence posts, sill plates, landscape timbers, pilings, guardrails, and decking, to name a few, are all examples of chemically treated wood.

Why is Treated Wood Waste Considered Toxic?

TWW contains hazardous chemicals that pose a risk to human health and the environment. Arsenic, chromium, copper, creosote, and pentachlorophenol are among the chemicals used to preserve wood and are known to be toxic or carcinogenic. Harmful exposure to these chemicals may result from touching, inhaling or ingesting TWW particulate (e.g., leaching liquids, sawdust and smoke).

Who determined that TWW is Toxic?

TWW comes from old wood that has been treated with chemical preservatives. These chemicals help protect the wood from insect attack and fungal decay while it’s being used. Fence posts, sill plates, landscape timbers, pilings, guardrails, and decking, to name a few, are all examples of chemically treated wood.

Where can I find more info about TWW?

Visit Department of Toxic Substances Control (DTSC) – Treated Wood Waste (TWW) Frequently Asked Questions Website.

Residential Customers

Salinas Valley Recycles will continue to accept TWW from residential customers on a limited basis.

The material must be separated from other garbage and recycling materials.

Salinas Valley Recycles will collect and store TWW for proper disposal at a Class I landfill.

Commercial Customers

Salinas Valley Recycles is working with other landfills across CA to obtain a variance to these regulations. This section will be updated as the situation changes.

 

Until a variance is approved, Commercial Customers must arrange transport of TWW to a Hazardous Waste Landfill (Class I).

 

Contract with a licensed Hazardous Waste Hauler.

In California, unless specifically exempted, it is unlawful for any person to transport hazardous wastes unless the person holds a valid registration issued by Department of Toxic Substances Control (DTSC).

Check CalRecycle’s list of haulers

Search Department of Toxic Substances Control (DTSC) database for DTSC registration

 

 

 

Self Haul of TWW is very restricted.

Check the requirements here before self hauling any material.