Dr. Michelle Minihan:

The Deputy asked about the plant and the make-up of the three production lines. The committee will be aware that the Paterson Candy plant was completed in 1974 and upgraded in the 1990s. The Mahon and McPhillips plant was completed in 1988. They make up what is referred to as the "old plant" at Leixlip wastewater treatment plant. The new plant, which is referred to by Irish Water as the "AECOM plant", was completed in 2014. That is the distinction between the old plant and new plant. The Deputy asked if it was possible to separate output from the old and new plants. Separate streams come out, but the treated water is combined into one flow of treated water as it leaves the plant. One of the questions discussed at the time of the first boil water notices was whether we could definitively tell where water from the PCI plant was going. Because that water is all blended, with water from the old plant and the new plant leaving Leixlip and feeding the network as a single flow of water, it is not possible to do that.