Radiological hazards from deposits of tin-smelting slag and the problems of site clearance and disposal

High background dose rates from tin smelting slag used as sea defences led to the identification of our client's site as one of a number with a potential external and airborne radiological hazard. Surveys showed that access to the affected area should be restricted as a precaution. Samples taken for analysis fell just below the level of activity which would require the material to be disposed of as radioactive waste. To ensure safe disposal a scheme is being developed to dilute the slag with general building rubble before disposal to an appropriate landfill tip. (author)