Yeah, we found out the hard way this year that exposed lead is a no-no. I really wish that it had been explicitly stated that it cannot be exposed In the manual under the hazardous material section. We used lead dive weights, which as a diver I don't consider them hazardous in that form. Long short one of the safety crew said he thought we needed to call a Hazmat crew out to perform cleanup!
Maybe FIRST could provide us with a standard from EPA, OSHA, UL, or some other organization so that we can be informed of proper rules.
Edit: not bellyaching, just trying to let others know so they don't put their students in an uncomfortable situation.