Mr. Eoin McGrath:

I might be able to clarify that as well. In this particular situation with the quarry that prompted the audit, as Deputy Mac Lochlainn requested it, when we took samples of the blocks, one of the questions was from which particular stockpile of material had this block been manufactured. We can essentially retro-engineer that. We can split it open and do a petrographic analysis on the sediment or the aggregate and we can check which of the particular stockpiles it is from. When the stockpiles are extremely distinct from each other, for example, where there is perhaps a quartzite and a volcanic rock, it is relatively simple to do.