Table 1. Site EPA Plutonium-239 Soil Sampling Results at Rocky Flats, Colorado, Comparative Sampling for 0- to 1- and O- to 5-cm Depth Sampling Depth |Mass/Area/Concentration (em) (g/em*)al I- 9/0 tol a7" 277," 28; =" 30," 0. 70 0.84 Q.59 0.57 0.66 I- 1/0 to 5 la)" uy; “ 16; " 4.81 5.16 4.96 4.70 20} " "5.11 (£Ci/g)b 130 t 46+ 72 + 33 + 32 + 19%* 8 10 9 8 14.8 + 7* 51+ 9% 40 + 9 29 + 10 23+ #7 + 210 + 65% + 96 + 91 + 110 Concentration per Unit Area Individual Standard |Coeff. of Results Mean Deviation| Variation (nCi/m*)b 0.91 0.39 0.42 0.19 0.21 (nCi/m?) (nci/m?) 0.42 0.29 0.69 1.18 1.57 0.74 0.47 6.45 4. 56 6. 86 7.41 7.28 6.51 1.15 0.18 6.14 0.26 0.31 0.39 0.71 2.61 1.98 1. 36 II - 9/0 tol wo" a7," 28)" 30)" 0.43 0.48 0.49 0.57 0.52 1,500 950 1,400 1,300 1,400 II - 110 to 5 14,” 1s} 16} " 20)" 3.90 5.78 6.79 4. 40 5. 86 $40 350 460 360 470 + + + + t 44 30* 37 30 41 Ill - 91/0 to l 17" 27," 25; " 30) " 0.58 0.46 0.47 0.49 0.44 210 |28,000 120 170 130 + + + + + 61 c 1.22 c 6000°|Discounted” ** 18 0.56 18 0.83 16 0.57 0.80 IIT - 1}0 14} is} 16}, 20; to 5 " " " “ 5.03 4.64 4.45 2.72 4.06 IV - 910 a7; 27), 23; 30] tol " " " " 0.34 0.31 0.40 0.52 0.46 650 550 910 1,000 970 IV - 1/0 to 5 i} 1} " 16}; " zo; " 3.96 5.13 6.27 4.93 6. 38 302 250 240 360 290 30 + 20 + 40 + 344 31 + Mass of material less than No. c 21.1 20.2% 31.2 15.8 27.5 23.2 6 8* 7 8 7 1.51 0.93 1.78 0.93 1.26 1.28 0.37 0.29 + t + + + 66 43%* 62 74 71 2.21 1.71 3.64 5.20 4.46 3.44 1.47 0.43 + * t ¢ + 30 25 24 30* 26 2.90 0.19 12.0 12.8 15.1 17.8 18.5 15.2 10 mesh, divided by the sampled area. Error term for the fCi/g values is the 2-sigma counting error term. An error term is not given for the unit area concentrations, bute it would include the counting error, any error associated with the mass per area, and other errors mentioned in the text. This value grossly exceeds the other 15 (this table, Table 2, and duplicates) values from this site. The value is excluded from evaluations of the data (see the text). Subsequent to the preparation of this paper, analyses of three additional aliquots of this sample indicated values of 140 fCi/g, 110 fCi/g, and 120 FCi/g, providing evidence that the value of 28,000 fCi/g was an anomaly. Average of two duplicates; error term is the counting error for the individual results. ae Recounted for confirmation of results. 653