Thank you in advance for your help. I'm completing a kitchen renovation in my 63 year-old home. When I removed the lower cabinets, I discovered some asbestos (I believe) tile. The tile wasn't in squares, but appeared to be in longer sheets (I put a pry bar under it and it all popped up in a single sheet). This tile/sheet was adhered to the hardwood floor under the cabinet and, after being removed, left a think black layer. Since some of this hardwood floor would be exposed in the new renovation, I took a sharp knife and scraped a small portion of the black layer away. I then hand sanded a small portion to get to the wood.
To my surprise, I learned tonight that asbestos can be found in mastic and am now very concerned that my sanding has caused a series problem. Fortunately, I only sanded roughly 1 square foot. Since some experts seem to post on this forum, I'm curious about the type of health damage I inflicted today. I realize sanding is probably the worst thing I could have done to the mastic now, but, since the area was small, should I have concerns or am I fretting needlessly? Thank you!