a6 24 22 DOSE-RATE (mr/hr) 20 $ o\ o J ~~ 14 oo (206 15 1200 16 t200 I7 1200 18 1200 19 1200 20 1200 2{ $200 22 12 MAY 1958 - TIME Figure 5.1 Site Elmer Background Radiation Intensity Curve 180 170 150 130 120 119 7 DISINTEGRATION PER MINUTE (x 1000) 160 100 90 80 70 60 50 20 Figure 5,2 2l 22 MAY 1958 23 24 Fallout Tray Sample Decay Curve 21 25 26