High in potassium material. A tiny portion of elemental potassium or potassium compounds have natural radiation. About as dangerous as driving the produce truck.
Well my doc says that I’m chronically low in potassium, so now all I have to do is go out and lick the highway every now and then................
Typical. There is absolutely no indication what radioactivity levels would be encountered.
There can be absolutely no risk assessment of any kind unless we are told what the isotope is. Some digging told me it is likely Ra-226 in the Phosphogypsum (from naturally occurring isotopes in the Uranium chain) and Radon is only a real problem in enclosed spaces with little air flow where it is possible Radon concentrations can build up over time.
Without knowing what the heck specifically they are referring to, I would classify this as EPA BS.
It is called NORM. “Naturally Occuring Radiation Material. There have been many lawsuits brought against Oil Companies and Contractors, which have all been defeated (Mostly in Louisiana).