as long as the dust is not air born its not dangerious unless you make it airborn wet the area with water. I have asbestos at work and when its airborn no mask will keep it from entering your body unless its the HEPA and designed for it. When I make repairs with insulation on water pipes and boilers. I first put a bag around it called a glove bag. then wet the area do my repair and secure my trash. If you are doing it in a closed area you need to have positive ventilation and or a HEPA Vac to trap the dust. I have taken the classes many times and have been certified for maintenance and not removal. I have never done it for this type of senerio but on piping and if its too big for me I call the pro's.
I know its everywhere the poor check points guys like crossing the border with the stop and go those guys really get exposure along with the street vendors.
I hope I did not scare anyone but when I doubt let someone else do it.
"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen
56 Chevy 3100