Biomedical& Environmental Lawrence Sciences Divisions Livermore National Laboratory 410002 September 18, 1984 R Ih. Wi-Uiam BaA 6 Rog Thomph on Paci@ Notihwcwt L.abozatotiti Ba.tdh Av enw Rich-land, Wa. 99352 Dear Rog, Enclosed is the report on the resuspension study at Bikini. You will note that Table 7 on page 19 of this report is the table that was included in the Bikini dose assessment report UCRL-53225. The problem with the units in Table 1, page 8 of UCRL-53225 is that the micro (p) symbol was omitted from the units of both the dust aerosol column and the soil Pu activity column. Thus, the units for the dust aerosol should be pg/m3 not g/m3. Similarly, the units for the soil Pu activity should be aCi/pg (which is proportional to pCi/g) and not aCi/g. This was done to make a direct calculation possible for pulmonary deposition in aCi/h; sorry for the confusion. I have also enclosed (Enclosure 1) a comparison of the dose methodology for bone marrow and endosteal cells for surface deposited transuranics for the Spiers and ICRP models. The values we use for the parameters in the lung model are those listed in ICRP 30, Part 3, and attached as enclosure 2. Sincere-ly, William L. Robison Section Leader Terrestrial & Atmospheric WLR/mt enclosures Sciences