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CHROMATED COPPER ARSENATE (CCA) Wolmanized® wood is poles, piles, timbers, posts, or plywood that is pressure-treated with CCA preservative to provide structural protection from termites and fungal decay. For over 70 years, CCA-treated wood has been specified in a wide variety of applications; as of December 30, 2003, Wolmanized wood may be produced for only agricultural, commercial, industrial and limited residential uses. This includes wood that will be in contact with water, soil, concrete or masonry, subject to periodic wetting, or exposed to moisture or high humidity. When used as recommended, CCA-treated wood is harmless to people, plants, and animals. Its use provides environmental benefits as well as decades of service. Additional Information.