22 As is to be expected from the nature of the cleanup and emplacement, there is a wide range of concentrations. Summing the team with the 73°*?**py, one arrives at a mean value for the transur- anics of 21.4 pCi/g. If there are 12.6 Ci of transuranics in the dome (U.S. Department of Energy 1979) contained in 105,000 cubic yards of soil and one assumes a density of 1.8 g/cc for the soil, the average concentration to be expected would be: 12.6 ° 10%? 105,000 * 0.76 *° 10° ° 1.8 = 87 pCi/g. The observed and calculated values are in reasonable agreement since the contribution from the material encased in concrete in the "donut hole” at the center of the dome is nat considered and neither the means Calculated from the samples nor the estimates made during the cleanup are likely to-be very accurate. Water samples taken from two different levels of a hole drilled in the dome also were analyzed. The water was filtered through a 0.45=- micron filter and both filtrate and filter were analyzed. The mean values (in pCi/!) were as follows: Radionuclide Soluble 2asTasep, | telan Particulate 0.05 77.8 0.005 67 **Sr 331 “*76s 248 112 . 146 The transuranics are essentially all associated with the particulate fraction and not as available for transport as ''’cs and '*Sr where the greater concentrations are in the soluble fraction. The mean values (in pci/t) for samples from the 20-foot level in the two wells outside the dome were as follows: Radionuclide iseTreepy Sdn reg, 137% s Soluble : | . . Particulate 0.142 164 0.003 59 225 156 27 .97 Somewhat higher concentrations of all nuclides were found in samples from the 40-foot level in one well. However, at the present time it is not clear if these radionuclides in the well samples are coming from the dome or from the fall-back zone or were present in the soil from other causes such as the work done in preparation for construction of the dome. An artificial beach was constructed for the off leading of the material placed in the dome and it is probable that contaminated toe on A Mow? cma cr) cn soil was used in its construction.