My take on it is not to worry if you're not down wind or down stream from the areas down wind.
What is done is done. I wouldn't trust the ground, plants, or surface water in those regions for years. But I haven't dug into to degradation speed of these chemicals. If you cannot relocate, at some point you need to leave the bunker and live the life you have.
Base of cell phone antenna and check points of underground pipelines are both secure, rural, all over the place, internet connected, have electricity.
If we are going to destroy the economy and make global famine, it would be worth spending some money in good weather data.
Looks like your link is no longer upto date on this story. You should likely stop spreading your old news and is now misinformation.
"Biden admin turns down Ohio's request for disaster assistance after toxic derailment"
https://news.yahoo.com/biden-admin-turns-down-ohios-181749866.html
https://www.foxnews.com/politics/white-house-explains-why-turned-down-disaster-relief-ohio
Convolution.
Mixing multiple functions together makes it harder to pin point one function and rule out the others at an individual level. For example, did you get 'normal' cancer, COVID cancer, Vax cancer, or train crash smoke cancer?
At a population level it doesn't matter. You are still dead early.
Here QR code says...
You'll be covered by OneWeb which is a competitor of starlink.
https://satellitemap.space/?constellation=oneweb