TABLE 5-1. RESULTS OF ENEWETAK EXTERNAL QUALITY CONTROL PROGRAM Values are pCi/g, plus or minus 2 sigma counting error Batch No. (Date) 1 (12/78) 2 (3/79) 241 am 238 Py 32.9 23.0 30 33 + 0.4* + 2.3 +1 + 1.4 1.3 Not 1.2 Not 24.0 + 2.4 Not Done 37 + 1.4 Not Done 2806+ 1 2.4 + 0.06* Done + 0.1 Done + 0.1 3 (6/79) 6.19 + 0.28* 6.11 + 1.00 0.12 + 0.02* 0.05 + 0.01 4 (9/79) ** 3 (9/79)** 239,240 py 137 Cs Lab 64.0 77.2 66 71 + 0.62* + 4.6 + 9 + 10 107.9 119 120 114 + 0.72* + 8.3 + 2 +2 177 102 156 106 + + «6+ + (3 19 21 5 A B Cc D 64.5 + 6.4 116 + 8 154 + 26 B 61 + 8 113 + 2 Not Done 126 + 2 107 +1 Not Done 9.90 + 10.7 + Not Done 0.25* 0.7 10.83 + 0.19* 9.92 + 0.80 5.91 + 1.00 5.63 + 0.6 0.04 + 0.01 Not Done 9.20 + 10.9 + 1.10 0.11 10.5 10.5 6.77 + 1.02 9.94 + 0.59 0.04 + 0.01 Not Done 9.13 + 11.6 + 0.98 0,12 4.01 + 0.7 90sp *Mean value and associated standard deviation based on several aliquots. **T wo batehes were analyzed the last quarter. 150 + 2 C D 207 ++ 2* 37.1 + 1.0 A Al + 0.6 + 0.12 41.9 + 0.5 34.6 + 7.8 Al B 9.96 + 0.58 11.7 + 0.12 40.8 + 0.5 38.2 + 6.5 Al B 10.6 + 0.85 Not Done B