Statistical differences were observed among the study sites Mean Cs
1.1. Radium contamination
Radium (226Ra) was used extensively during the 20th century predominantly in the form of luminescent paint. Waste generated from military, industrial and pharmaceutical products was regularly buried with little record of its location and inventory (Harvie, 1999). With a half-life of 1600 years, 226Ra contamination is a multigenerational issue. In the UK, a recent government report conservatively estimated there to be 150 to 250 contaminated legacy sites, whilst acknowledging there could be as many as a 1000 (DECC, 2012).