CCA Lumber – EPA Ruling
Chromated copper arsenate, or CCA, has been used to preserve wood since the 1940's. The use of CCA in residential applications was banned after 12/31/2003. Cca treated wood chemicals were found to dissolve in water and leach out of the wood, causing potential harm. Sealing cca treated lumber will reduce leaching of the chemicals. Be sure to use a synthetic resin to keep the lumber from becoming a mildew and algae smorgasbord and read these advisories for safe handling!