Dara Calleary (Mayo, Fianna Fail) | Oireachtas source

I am just concerned. There is an impression given this is nearly naturally occurring, yet there are quarries producing blocks that have not produced any problems and there are quarries that are producing blocks that have. From the various expertise of all our witnesses, how much of this is so-called man-made and how much of it is down to specific actions that either were or were not taken? I am conscious our guests do not want to veer into specific cases but I fear as we go along this is going to be seen as a natural phenomenon when the evidence says it is not. I apologise for cutting in there.