Two samples were also analysed for polychlorinated dioxins and furans (PCDD/Fs), a class of chemical that can be formed during the combustion of materials present in e-waste. Soil from an open burning site was moderately contaminated, while sediment from the Agbogbloshie lagoon contained a very high level of these highly toxic, highly persistent and bioaccumulative chemicals, at a level just below the threshold defined as being indicative of serious contamination for sediments in the Netherlands. Though this study did not attempt to quantify damage caused to the environment or human health, the results do indicate that the exposure of workers and bystanders to hazardous chemicals may be substantial. In.