Table 2-1. Sample Location Variation of Duplicate Analysis for Pu-239 Depth (cm) Duplicate Results (f£Ci/g) Pu-239 (£Ci/g) Absolute Difference + by Avg. % Est. Variance (Difference of Dup. x 0.886)2 3.46 I-16 5-10 <5 I- 1 0-5 20 + 6.6 III-14 0-5 13 + 8.1 27 I-14 0-5 42 + 8.8 59 II 5-10 69 + 9.7 110 +4185 46 1,319 IV-16 0-5 260 + 24 460 + 40 56 31,400 II-14 0-5 330 + 30 370 32 11 1,256 TI-17 0-1 970 + 70 930 + 62 Average 7.1 + 4, 35 9.6 4 7. 70 84.9 + 6. 70 153.9 + 9, 34 226.9 230 4.2 4l 675 1,256 4,491