PU is nasty stuff. We cleaned and cleaned with only damp rags and would never get it up some times we would use easy off oven cleaner.So many places in 234-5 z plant where they could not clean it up it was just painted over to contain it.
I worked with a couple guys out there that had life time dose. The man Harold(he was a heck of a crib player) was working in the tanks farms when I meet him he could only work in beta gamma zones. One man I worked with at B plant not allowed in a zone for life when I meet him.
Whats funny is the down winders all saying how bad it is and the cancer rate . The men they talk about in this none had cancer.
I do not recall anyone gettng cancer from working there.
Oh will have a nice 4th eveyone .