Ask your painter!!! I would be quite confident that your painter knows the laws. He may have already tested for lead. It is a very simple "wipe and look" type process available at any good paint store. If there is lead based paint, there are procedures to follow. I don't know all the procedures required for painters, but using a negative air machine is one for asbestos work. They just did a water tower here a few years ago and had to completely shroud the thing till it was blasted and sealed.
The cautions, codes, and laws are there to prevent contaminating other people or properties whether air born or ground contamination from drainage water. ______________________________ Keep the whole world singing . . . . DanG (remove the sevens) snipped-for-privacy@7cox.net