We contacted those families, and let them know.

Everybody came in that was in the local area to participate in this because of the high volatility.

You have 1,500 kids, you have a hazardous material which is minimum in exposure and distribution, but we have a high volume of students. We have a responsibility to protect these citizens.

Mercury is kind of a funny metal where it does neat things when you're playing around with it. They proceeded to play with it, some of it spilled down on to the floors, the carpets, the vinyl, tiles -- mercury being a hazardous material now, they called us with concerns so we started the process of finding out the actual exposure to the school itself.