Dioxins In Remediation Workers
Author(s)
C. Winder & G. Smith
Abstract
A survey was conducted on workers involved in the remediation of a large,
chemically contaminated site in Sydney, Australia. Workers were monitored for
chlorinated dioxin and furan congeners in blood lipids over a two year period.
Baseline levels of blood dioxins in workers starting at the site were similar to
background dioxin levels in Australians (below 10 pg/g blood lipids). An action
level of double the background levels (20 pg/g blood lipids) was used as an
occupational health limit. As time progressed, blood lipid levels in workers
increased, with the most likely source being exposure while working at the site.
While levels of most congeners remain relatively even, most striking was the
proportion of tetrachloro-congeners in exposed workers, which increased
steadily. Worker exposure was above the action level in a small number of
workers; these workers were transferred to other projects where the potential for
dioxin exposure was absent. The role of congener profiling in occupational
biological monitoring may provide additional information on workplace
exposure to dioxins and related compounds.
Keywords: polychlorinated dioxins, worker exposure, environmental
remediation, biological monitoring.
1 Introduction
The polychlorinated dioxins (CDDs) and furans (CDFs), are a group of materials
that is often associated with wastes and waste disposal, and one particular
member of this group, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is often
incorrectly called \“the most toxic chemical ever found” [1]. While 2,3,7,8-
tetrachlorodibenzo-p-dioxin is the most toxic of the CDDs, the other CDD/CDFs
also have varying toxicities, and the range of toxicities can differ by a factor of
Keywords
polychlorinated dioxins, worker exposure, environmental
remediation, biological monitoring
Related Book
Other papers in this volume
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