Yeah it was dioxin. Terrible shit. A couple months ago I went down a deep rabbit hole reading about that incident and so many other completely preventable environmental disasters. Another crazy one was Love Canal, a toxic waste dumpsite that sold the land and a school was almost built directly on top of it. They decided to build the school a tiny bit to the North. Predictably, the land sunk down and filled with rainwater, that children started to play in.