Pressure-washing decks that were built with CCA-treated lumber can expose people and pets to at least two carcinogenic compounds, a study says. CCA, chromated copper arsenate, is a wood preservative that was banned for most (but not all) residential applications at the end of 2003. But plenty of decks built with CCA-treated pine still exist, and blasting the wood with a high-pressure washer can help release both arsenic and chromium, a published report says. Adding bleach makes the situation worse. The study was published in the journal Environment International. Researchers tested a single 25-year-old deck in Florida but said results are representative of pre-2004 decks. A key recommendation: Keep kids and pets off wet CCA decking. Read More