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Hardy, L. Dioxin 2017: August 20-25, Vancouver, Canada. 3 pp, 2017

A large-scale contamination assessment of a former wood treating site completed in 2015 was compared to results of field work conducted in the early 1990s. The 2015 results clearly show that while dioxins, chlorophenols, and metals are (as expected) the main contaminants at the site, significant natural attenuation of all contaminants has occurred. These results are attributed to reductive dechlorination of dioxins and chlorophenols and to biovolatilization of metals. The combination of persistent organic pollutant degradation and metals biovolatilization seen at this site is not unprecedented as arsenic biovolatilization in the presence of DDT has been documented, and addition of biochar has promoted organochlorine degradation at a similar site. http://www.dioxin2017.org/uploadfiles/others/9632_0504083747.pdf

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