§ Mr. Litterickasked the Secretary of State for Scotland what is the radioactive intensity of the granite of which most of the buildings of Union Street, Aberdeen, are constructed.
§ Mr. Gregor MacKenzieGranite contains a small amount of uranium and hence is very slightly radioactive. The effect is indicated in the terrestrial background radiation level which in granite796W issued by chief officers of police in Scotland by police area for the years ended 31 December 1976 and 1977.
§ Mr. Harry EwingI regret that not all of this information is readily available in the form requested. Such details as are available are given in the table below.
buildings in Aberdeen is about 150 millirem per year. This is however only slightly above the normal background level of about 100 millirems per year.