RE: A surprising finding of NORM additional information

["Scott, Arthur (MOL)" <Arthur.Scott@MOL.GOV.ON.CA>]

Sonter mark wrote:



	I have just returned from a large metal recycling facility where the

truck portal radiation detector was set off by a top-loading automatic

domestic washing machine....the weighting material in the balancing ring is

heavy mineral sands 



	What other circumstances exist where mineral sands get used as

ballast ??



I have seen truck portal radiation detector set off by mineral sands used in

old garage door counterblance weights. Modern garage doors use springs.



Arthur Scott

Ministry of Labour Radiation Protection Sevice 

Ontario

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