> benzene, some pesticides, and formaldehyde are the common workplace exposures that can trigger leukemia.

That rings a bell. I remember that someone mentioned a recent repainting of the building. The incident happened at least a decade ago, so I can't remember all details.

I just finished Silent Spring last fall and was shocked to learn they already knew DDT and other pesticides were causing leukemia back in 1960. I guess PR from the chemical companies is working, because I would have guessed 1979-1985.