Also, if your deck was built before 2004, there’s a good chance it’s made of lumber treated with chromated copper arsenate. Regular refinishing helps to seal in the toxic arsenic that CCA ...
What is the Kerr-McGee Wood Treatment Facility? The Kerr-McGee Wood Treatment Facility, 2800 W. High St., treated railroad ties with creosote and other preservatives from 1907 until 2004.
“This accidental discovery really gave a critical data point,” said Ning Zeng, a University of Maryland climate scientist whose team unearthed the ancient chunk of wood. “It’s a single ...