1. Viktor A. Yushchenko Ukrainian opposition presidential candidate Among the Most Toxic Chemicals Known to Humankind PCDDs polychlorinated dibenzo dioxins

2. Dioxin levels 80 times the State of Michigan cleanup standards were found near parks and residential areas in a floodplain south of the City of Saginaw at the confluence of the Tittabawassee and Saginaw Rivers. Among the Most Toxic Chemicals Known to Humankind PCDDs polychlorinated dibenzo dioxins Dioxin is formed as an unintentional by-product of industrial processes involving chlorine, e.g. waste incineration, chemical and pesticide manufacturing and pulp and paper bleaching. Dioxin was present in Agent Orange (a defoliant used in the Vietnam War), was found at the Love Canal (a chemical dump site in Niagara Falls, NY) and was the basis for evacuations at Times Beach, MO (where contaminated waste oil was spread on dirt streets). TR SR SB Confluence

3. Among the Most Toxic Chemicals Known to Humankind PCDDs polychlorinated dibenzo dioxins Research on dioxin sources concluded that the chemical was a ubiquitous product of the combustion of organic matter and the author of the study commented that, “We now think that dioxins have been with us since the advent of fire.”

4. Among the Most Toxic Chemicals Known to Humankind PCDDs polychlorinated dibenzo dioxins The Hites Group Indiana University Association of dioxin with sediment. Persistence of dioxin. Geochronology of sediment. Unimagined riches and Glory. Nobel Prize. Dawn of Fire.

5. Among the Most Toxic Chemicals Known to Humankind PCDDs polychlorinated dibenzo dioxins

6. Among the Most Toxic Chemicals Known to Humankind PCDDs polychlorinated dibenzo dioxins 2011 - EPA and Dow Chemical Co. sign a legal agreement requiring Dow to clean up sediment in a three-mile stretch of the Tittabawassee River next to Dow's Midland Plant. Cap contaminated sediment with clean material. Remove and treat DNAPL (Dense Nonaqueous Phase Liquids) Isolate contaminated sediment with sheet pile and a cap and capture water within the sediment and treat it. Dredge and dispose of contaminated sediment Management Actions