09
Feb
Katrina Results in Increased Arsenic Levels
(Beyond Pesticides, February 9, 2007) The effects of Hurricane Katrina are still being felt in the Gulf Coast, a year and a half after it hit. Research shows one of the secondary effects of Katrina is increased arsenic levels, largely due to debris treated with the wood preservative chromated copper arsenate (CCA). The debris, mostly originating from damaged and destroyed residential buildings, total 72 million cubic meters, of which 16% has been estimated to be wood, and all of which must be added to landfills. The resulting risk to groundwater is an estimated 1,740 metric tons of arsenic, much of which has been deposited into unlined landfills. The source of this arsenic is primarily from chemically treated lumber, as chromated copper arsenate (CCA) was once commonly used to pressure-treat wood. The Environmental Protection Agency (EPA) has since banned the use of CCA in residential projects, but many older structures still contain the treated wood. A study, released online in the January 2007 issue of Environmental Science & Technology, led by Helena Solo-Gabriele, Ph.D., of the University of Miami and Brajesh Dubey, Ph.D., of the University of Florida, surveyed debris in New Orleans. Out of 225 pieces of lumber tested in […]
