So, there's a bunch of demolition on this project I'm working on so we go to the site to get pictures and establish what gets demoed and what stays. I'm in this building that's got some equipment that needs saving but the rest is getting destroyed. I notice a big, "warning radioactive material" sign on a closet and ask, "do we need to worry about the radioactive material?"
The owner say's, "What radioactive material?" '
I say, "I don't know but there's a sign on these 2 doors."
The owner while looking directly at the sign with the orange and red radioactive at eye level then says, "What sign?".
To make a short story long, they have no idea what it might be.