TY Tt TT O-! ® 2100 te 2300 26JUNE 1956 MP Typo AAfilter 7 NN oO J \ + K ee l.t7 Ie b— = , — , N, t- 107 ¢ y D- $a-0000 10 130 Ln Too 27 JUNE 1956 \ ‘ odour filters 0-2-2315 to 2330 Sto tOw Ks— 1.08 YUPPTrryryry Beta Activity c/m r —— MP Typo AA filter Ke-1.28 O-3b middic filter __3 &S membrane th K#- 429 { i } 10 | — = D-Se bottom filtcr $8&S membrane 0.45 ~ Kt+-3.486 pt 5 10 I i { i tipit 20 50 1a Hours Since Oetonation Figure 5.2 Decay curves for Shot Dakota air samples. 123 L 200 L

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