Just about every minerals business is going to have loads of fluoride to discard--aluminum, uranium, gypsum, NPK, etc. A few years back I watched a documentary about a fertilizer plant in Morocco, dumping the fluoride they discarded from their NPK mix into the water supply. All of the children near the plant had spindly, twisted arms and legs from skeletal fluorosis.

It is also peculiar that a toxicologist becomes a dentist, and ends up at the atomic energy commission[0].

[0] https://en.wikipedia.org/wiki/Harold_Hodge