Asbestos floor tiles?
My office has asbestos floor tiles (9x9) which contain I'm told 5-10% asbestos. I've had a rolling chair in there for two years. When I first moved my office in, the tiles had a layer of protective wax. My wife recently noticed that the tiles under the rolling chair have had the wax rubbed off. The tiles are certainly not crumbling away, but probably for the last 6 months to a year, they have not had the wax coating on - it's been rubbed off by the chair. I can take a finger and - drawing it across the tiles - can pick up the tile residue. How much of a health concern is this? I have started the testing for air quality in that room, but it's fairly disconcerting. As I said, the condition has probably been that way for about 6 months or so. Any thoughts or advice would be appreciated.