Some research says no amount of exposure is safe, so I consider that an issue. A late friend of mine researched this sort of thing. EPA scientist’s work could improve mine safety | MinnPost

It's true that increased exposure increases the risk, but that doesn't mean less exposure is safe. After all, you only die once and you want to do it right.

Like I said though, I would treat it the dust the same whether it is or isn't asbestos, though I might choose to not do the job myself if I thought it was. Right now I think it probably isn't, but since I can't start the job until April anyway I will look into it some more. Aside from that, after the feedback here and the other threads I've read I am confident I can probably get the job done myself.