| Jan. 1, 2004 The EPA banned chromated copper arsenate (CCA) as a preservative for wood intended for residential use (except for the lumber that is used in permanent wood foundations). CCA-treated lumber will still be available for industrial and agricultural use. There's no need to panic about existing CCA-treated structures. The EPA says that they're fine. To reduce the chance of leaching chromium and arsenic, you can paint it with an oil-based penetrating stain every couple of years. | |
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