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You don't need a large number of the worst dioxins. That's one of the things that makes them so bad. I'm sure you know that. As of today/yesterday: "The EPA ha

You don't need a large number of the worst dioxins. That's one of the things that makes them so bad. I'm sure you know that. As of today/yesterday: "The EPA has not yet tested for dioxin contamination" https://www.statnews.com/2023/02/21/east-palestine-train-chemicals/ https://www.statnews.com/2023/02/21/east-palestine-train-che... From a brief look at Pubmed it looks like the top articles investigating dioxin formation look at total dioxins formed, not the specific molecules. This one states that PCDFs form in greater amounts than PCDDs: https://pubmed.ncbi.nlm.nih.gov/17432330/ https://pubmed.ncbi.nlm.nih.gov/17432330/

mindslight 4y ago
That's a great article for its breaking out the various chemicals and focusing on each one. In line with what I've been thinking, it's talking about dioxins as a result of burning PVC (which was in some bulk hopper cars, according to a manifest I saw), which was burning as a result of the derailment (as contrasted with the liquid vinyl chloride, for which the burning was seemingly a deliberate economic decision). I agree that there should be more testing, and the fact that testing for expected combustion products wasn't start immediately to inform decisions about evacuation is criminal.