In June 2017, the Property Management Branch of my Department became aware that soil had been deposited to the rear of Donnelly's Hollow. The Department subsequently engaged environmental consultants to carry out an environmental risk assessment of the site. The material deposited has been identified as fill material comprising of clay with trace amounts of construction and demolition materials. The Department of Defence has had the site monitored on a quarterly basis and there is no evidence that any environmental pollution or degradation of the infill material has occurred. I am advised that Kildare County Council have acknowledged this assessment and have accepted that there is no evidence that any environmental pollution has been caused.