As it now stands, it's just the occasional computer Geek down there for a night or two, and I have to believe all that deep coughing they do the week after is cleansing their system of anything bad.
Mark, be careful. I don't want to alarm you. There is a ton of asbestos litigation around here and I know several attorneys that do that kind of work, on both sides of the table. The particles can't be coughed up, that's the problem. The little glass like crystals cannot be removed from the complex web of the lungs, and result in mesothelioma (lung cancer). It is rampant around here as asbestos was a common product in the oil and gas manufacturing sector in the 50s - 80s. It's fine unbroken, but if your dealing with busted up stuff, seek help my friend. At least wrap it up so the particles can't escape if you are not going to remove it.
Sincerely, Chicken Little
