A new website, TWWDisposal.org, has been created to provide comprehensive information for those disposing of Treated Wood Waste, or TWW, within the state of California.
The state requires TWW to 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.
NEW! An annual report reviewing the wood preserving industry's TWW disposal outreach activities in 2021 and early 2022 is now available. Click here to review.
The website feature information specific to those users disposing TWW, from households and contractors to businesses and large quantity generators. Specific sections include identifying TWW, handling, storage, labeling, transportation, notifications, recordkeeping, reuse and TWW prohibitions.
Visitors also can get the most current list of approved landfills in the state that can accept TWW and review disposal regulations from the California Dept. of Toxic Substances Control.
>> See the website
There are now two different campuses online where you can get an eduction on preservative- and fire-retardant-treated wood products, as well as continuing education units, or CEUs, from more than two dozen organizations.
The Wood That Lasts eUniversity is open 24/7 and now features courses from AEC Daily and Architectural Record's Continuing Education Center, the top online education platforms for architects, designers, specifiers, contractors and building product distributors.
Featuring self-directed and narrated courses, the Wood That Lasts eUniversity is offered for preserved wood products and fire-retardant-treated lumber and plywood. Unlike other schools, the campus is always open and the textbooks are available at no charge.
You must complete the free registration on the selected platform to take the courses and earn CEUs. Those completing the courses can earn continuing education credits (CEUs) available from more than 25 associations, including American Institute of Architects (AIA), Landscape Architecture Continuing Education (LA CES), National Assn. of Home Builders (NAHB) and the National Assn. of the Remodeling Industry (NARI).
>> Review the Wood That Lasts eUniversity
Get the latest information for specifying Western preserved wood products under the AWPA Use Category system with an easy-to-understand infographic and a detailed PreserveSpec technical guide.
Both feature the up-to-date descriptions of Use Categories from the AWPA Book of Standards and provide specific information to help select the right preserved wood product. The infographic shows the most common uses for preserved wood at homes, including treated decking, posts, timbers, plywood and other wood products. Review the common preservatives available for Western species, as well as the recommended use category for typical construction applications. The PreserveSpec guide is one of a series of guides to assist those specifying preserved wood products for any project.
Download the new publications from our exclusive online Technical Library.
>> Read more
Two top publications on preservative-treated wood are now available in foreign language editions for use in three countries.
The guides Preserved Wood: Wood that Lasts and Specifying with AWPA Use Categories have been translated into Chinese, Japanese and Spanish editions. The two guides offer key information about the benefits and uses of preserved wood, as well as important specification details for international customers who want to use the products.
Asian countries have expressed interest in preserved wood, given climate conditions that are conducive for decay and the presence of wood-destroying insects such as the Formosan termite. Also, in Mexico pressure-treated wood is popular in constructing facilities at resort destinations.
The publications will be used within the respective countries by trade offices supported by the Softwood Export Council (SEC). WWPI is a member of the SEC
>>See the international publications
Hear the story of preserved wood and the many advantages in using it in trails and other outdoor structures in a new video.
WWPI Sr. Program Manager Butch Bernhardt was invited to present an 18-minute talk without notes at the 2019 International Trails Symposium in Syracuse, New York. Bernhardt told trails managers and builders about the history of pressure-treated lumber and dispelled the many myths about preserved wood products.
"Despite its wide use, treated wood is often dismissed for being 'too' – too primitive, too much maintenance or too dangerous to the environment," said Bernhardt. "However, the real story of preserved wood today is far different than these perceptions."
Watch the video on the WWPI YouTube channel. The presentation was part of the new TRAILSNext speaker series by American Trails, a national non-profit organization representing the trail industry. The association professionally recorded all of the presentations and is making them available to their members.
>> View the video
Determining any potential impacts from using preserved wood in aquatic or sensitive environments is now easier with a new, user-friendly Environmental Assessment Model.
The online model streamlines the process of modeling the conditions for a project to estimate the potential migration of preservatives from preservative-treated wood immersed or over water. It is based on pioneering research by Dr. Kenneth Brooks and has been peer reviewed, repeatedly field tested and proven to protect the environment.
The model, which is also available as an Excel spreadsheet, has been used by the National Oceanic and Atmospheric Administration, U.S. Forest Service, Bureau of Land Management, U.S. Park Service, Environment Canada and Canadian Department of Fisheries & Oceans as well as a host of local and state regulatory bodies.
For more information on the model, go to the Aquatics section or review materials in the Online Technical Library.
>> See the model
Corps removes treated wood ban
The U.S. Army Corps of Engineers has settled a lawsuit brought by the preserved wood industry and has agreed to allow the use of preserved wood over and near waters or wetlands.
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Get the latest developments on preserved wood and the Western Wood Preservers Institute on our Facebook page. Be sure to like us to get our regular updates!
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