GeV tet a PONT Wlirohsthreo Toe eC: Dr. E. 1. DU PoNnT pE Nemours & COMPANY Walter Wcynen - BOS Germantown, MD INCORFORATLD ATOMIC ENERGY DIVISION wad SAVANNAH RIVER PLANT AIKEN, SOUTH CAROLINA 29801 2 CTWR 810-771-2670, TEL Bod B24 O331, WU April 5 253 AUGUSTA, GAL? ars 197o 401516 Edwin T. Still, LtCol, USAF, VC Research Program Coordinator Defense Nuclear Agency Armed Forces Radiobiology Research Institute Bethesda, MD 20014 Dear Colonel Still: Your letter concerning activities at Enewetak Atoll was discussed with our Health Physics personnel to try to get you 2 total picture of the problem as we understand it. ervain assumptions need be made, The material is protepiy nignly fused, thus most likely relatively insoluble. The material. is quite well mixcd with soil of one sort or other which dilutes it. ve would thus suggest to your radiation officer a program thet will not duplicate the Camp Desert Rock incidents in which T tool part, namely much ado after the fact with insufficient date. Thus we propasc that cach person to be exposed have a whole body count and a urine bioassay for plutonium before going. Then, each week, about 10% or more of the folks can submit a bioassay sample which your plane can take out so the entire work force is monitored during their stay, then upon completion, get another whole body count and bioassay. While there, full face respirators are suggested which filter particulates and have a filter factor of at least 50. The reason I have gone so far into prevention is because I can offer so little toward cure. Nasal smears merely state something went by; there is no rhyme or reason to the count as a low nasal count, but a long exposure gives more internal deposition than a single breath and high nasal count, for example. Then too on insolubles, the only real therapy is to enhance coughing or sneezing as no drug is of any’ real value. BEST COPYAVAILABLE rw ae, 7 5010925 iv ifiq W 7Y/ . + Y, ot 3