Gentlemen, Please take this seriously. As an army officer years ago I had to deal with both OSHA and EPA on lead issues when they forced the closure of many indoor ranges used by ROTC. They came in and tested the range air quality after every firing position was occupied and fired for one hour solid (something rare in actual use). They used that measure and applied it to the exposure levels for lead workers (battery factories, etc) multiplied the exposure level measured at the end of one hour on the range by 40 (regular work week) as if the ranges were in constant use 40 hours a week with the same people on the range for 40 hours each week (never happens in real life). This allowed them to declare the exposure rate to lead Ox, to exceed safe allowable limits and mandate expensive air filtering and ventilation systems. The expense to comply was more than many institutions were willing to pay so the ranges were closed. The individuals I met doing these inspections did not like the military and certainly expressed an attitude that universities had no business supporting gun shooting. They had an agenda in my opinion. I do not pretend to know these folks agenda, but I would be very careful thinking they will not touch us.