The techs measured vapor at 37,000 ng/m3 after the first day of cleanup, at which point there was no longer any easily visible mercury. Like water, mercury doe

The techs measured vapor at 37,000 ng/m3 after the first day of cleanup, at which point there was no longer any easily visible mercury. Like water, mercury doesn't need something to vaporize it; you just end up with some vapor as long as there's liquid present. (Post author here.)