Anxious week

Dear all, had a really anxious 10 days. Had a asbestos water tank removed by a licenced contractor and an air test carried out straight afterwards. The air test was fine. However later that day noticed bits of debris on the stairs and landing. Not sure if there was any dust. The contractor came back the next day to hoover these bits up. In any case just wondering if ther was a risk from a possible exposure. I dont think so but been really worrying about this.

Thanks