I have a room in my basement that has the old 9x9 tiles on the floor. They are in bad shape, and brittle. I want to remove them and just paint the floor. What I don't know is whether or not they contain asbestos. I am going on the assumption that they do. I can remove the tiles easily without breaking them by applying a little heat from a heat gun. Is there anything that I should be doing from a safety standpoint other than wearing a HEPA respirator? I'm not raising any dust.