River Watch www.trwnews.net
The mixture of dioxins in the T.River Flood Plain soil have a distinct profile (fingerprint). The fingerprints upstream of the Dow Chemical's plant in Midland Michigan clearly do not match those found downstream. This is almost overwhelming evidence that Dow is the source of the contamination.
Above is an example of a dioxin TEQ Profile fingerprint, click image to enlarge, click BACK to return to this page
Each different form of Dioxin is called a "congener." Dioxin belongs to a family of chemicals with related properties and toxicity. There are 75 different dioxins, or polychlorinated dibenzodioxins (PCDDs), 135 different furans, or polychlorinated dibenzofurans (PCDFs), and 209 different polychlorinated biphenyls (PCBs) Refer to Page 10 of the Phase II Final Report (very large pdf file) for a more indept discussion of the term "congener".
Each chart consists of a series of multi-color bars. Each multi-color bar represents an individual soil sample. The soil sample label is presented along the left border of the chart. Each color on the multi-color bar represents an individual dioxin congener. A color key is presented at the bottom of the each page. The amount of a color on a multi-color bar directly relates to the amount of the corresponding dioxin congener that is present in the sample.
It is the intent of the DEQ that presenting congener profiles based on both soil concentration and TEQ will assist in understanding the similarities and differences among the sample locations. A variety of methods are available to graphically display dioxin congener data, although there is no accepted best practice. The DEQ recognizes that all graphical techniques have certain strengths and weaknesses. The charts are most useful for providing a general understanding of the makeup of each sample in terms of the most prevalent congener(s), and the congeners(s) that are most toxic. However, similarities and differences among the congeners that make up only a small percentage of the total may not be readily discernable in these charts. The DEQ is continuing to analyze the Phase II data to better understand the dioxin contamination that has been identified. Patterns observed in these congener profile charts may be used to help direct this ongoing effort and to help formulate a more rigorous quantitative analysis of the patterns.
The MDEQ has provided 2 types of "Fingerprints" in it's Appendix J Dioxin Congener Profile Charts which are described below. Most TRW fingerprint reviews are based on TEQ Profiles. Appendix J lists all samples "Concentration Profiles" 1st, followed by the same samples "TEQ Profiles".
Concentration Profiles were generated using the actual concentration of dioxin congeners that were identified in the sample . These charts can be used to evaluate the percentage of the total dioxin concentration that is made up by specific dioxin congeners.
TEQ Profiles were generated using the total toxic equivalence (TEQ) that the concentration of dioxin congeners in the soil represents. The TEQ Profiles were developed to provide a visual representation of the toxic contribution of the dioxin congener relative to the total dioxin toxicity contained in the sample.
Below are 8 sample fingerprints from the Phase 2 sampling of the Tittabawassee flood plain. Depending upon the speed of your internet connection, they may take a minute or two to load. You can click on a graph for a close up view, use your BACK button to return to this page after viewing. All of these graphs and others are contained in the MDEQ Flood Plain Phase 2 soil contamination data (very large PDF file, it's quicker to get a view here)
Dioxin is everywhere, however the Tittabawassee floodplain fingerprints & it's extremely high Dioxin concentrations clearly indicate the source is located in Midland Michigan.
Dow keeps saying that dioxin fingerprints of Phase 2 do not match their current process. THAT'S BECAUSE, TO OUR KNOWLEDGE, NO ONE HAS DONE THE FINGERPRINTING OF THE CURRENT PROCESS. We speculate that Dow and DEQ administration have put off fingerprinting for Floodplain soils and soils from the Dow plant site because they know the fingerprints would match. If they have fingerprinted, Dow & the DEQ have not released them to the public.
Numbers on map above refer to graphs listed below which are listed in sequence as the Tittabawasse river flows from Upstream of Dow to Downstream from Dow
Phase 2 Sampling Results
1 Pine River- Upstream Dow
2 Chippawa River- Upstream Dow
3 Tittabawassee River @ Sanford- Upstream Dow
The 3 previous samples are UPSTREAM of the Dow Chemical Plant.
The 5 samples following are DOWNSTREAM of the Dow Chemical Plant.
Watch the fingerprints change, it's like magic!.
4 Caldwell Boat Launch-Downstream of Dow
5 Freeland Festival Park- Downstream of Dow
6 Imerman Park - Downstream of Dow
7 West Michigan Park, Downstream of Dow
8a Residence Back Yard - Downstream of Dow
8b Free Range Chicken Eggs from (8a)
9a Imerman Park sample by road, Downstream of Dow, most samples from a high ground area that seldom floods.
9b Livestock Farm, Downstream of Dow, by Tittabawassee River, not in flood plain.
10 Emerson Park in Midland, Upstream of Dow, some contamination - different fingerprint
Wetlands mitigation site at confluence of Tittabawassee and Shiawassee Rivers
Shiawassee National Wildlife Field Soil Samples