Table 3, Estimates of 239°240py Inventory in Surface Soil (0-5 cm) in Area 13 (Project 57) Using Two-Stage Kriging and Average 239°240p, Concentrations for Strata. Number of Samples Size of Part Strata Strata (m”) | Number of 100- x 100-Frt. (n) Cells* (v) | Estimated Inventory x I UsingKriging _ (Curies) - - 100(SE/1) i 2.0 3.7 2.3 8.5 16.5 0.37 0.61 0.37 0.91 1.2 18% 16% 164 11% 7% 2.5 4.0 2.0 19** 27 0.46 0.64 0.36 7.2 7.2 18% 16% 18% 39% 27% 7.0 0.77 11% 9.9 1.0, 10% ~ 66€ A (2 Cells Near GZ Not Deleted) 3 4 5 6 Total 108 , 000 74,000 19,000 24,000 225,000 14 18 20 AT 99 6 _ 22,140 44 116 80 20 26 242 - ne UsingStrataMeans _. SE SE 100(SE/1), 4 |ff B (2 Gells Near GZ Deleted) Total 223,140 24 96 ee 240 = 15 1.1 7.4% i . 18 - 1.3 7.1% i *One cell equals 929 m, **kThis estimate is one curie less than reported by Gilbert stored library samples collected in stratum 6. rs (1977). This results from the analysis of a new 10g aliquot from three These new Pu values were also used in obtaining the kriging results. Obtained using standard stratified random sampling theory. Note that the relatively low value of 1.3 in Part B versus 7.2 in Part A does not necessarily imply the estimate of inventory in Part B is closer to the true inventory than that in Part A. The deletion of the three high Pu concentrations have simply reduced the estimated standard deviation in stratum 6 from 2,043 to 300 uCi/m?. | i | { | i :