I propose to take Questions Nos. 170 and 171 together.
Following the accident at Chernobyl in April 1986, deposition of radio-nuclides took place on Irish soils. While many of these were of relatively small concentrations and also had a short halflife, two radioisotopes of caesium, namely caesium-137 and caesium-134 were of longer term significance. As a result of extensive surveys carried out on a nationwide basis by the Radiological Protection Institute of Ireland (RPII) on sheep grazing on upland soils, a limited number of upland peaty areas have been identified as having elevated levels of radionuclide contamination, including parts of the Ox mountains of County Sligo.