—_ AMsexu) as Project 21,5 - Short Malf-life Activities - F. Monyer another phase of Project 21,1 was engaged in finding total tritium fim the cloud, This wes done in the following manner: Carrier amounts of heavy water, krypton en! xenon vere a“4ei to the collection bottles prior te the pregram. The collection system eonsisted ef filtera “er particulate BEST Av cLAL LL SOPY Doow. ¥C