ones 3 x nr.’ THE ELUVIATION OF RW AGENTS INTO SOIL. =k - 241 Manfred Morgenthau and Albert H. Ferguson, 17 August 1953. out = Be fallout SECRET-RESTRICTED DATA Information was needed on the depth of penetration into soils oactive contaminants deposited on the ground surface under the OFeer on of definite quantities of water. Two RW agents were tested Brrrmee types of soil: zero, but +# + 500 hr, a4 wticles # -€S stud‘ es}. inted wit Two liters of water were then allowed to filter through ee ot entegrate. ow Samples were then taken at various head of 6 mm. constant 4 at crlumm eve wo oe seepage water was also measured. oror0 t53 ee ts accther. ~ atubes, -ompared x 108 and we ATTENUATION OF RADIANT ENERGY BY FOG-OIL AEROSOLS. Charles W. Forsthoff and John S. Desjardins, 26 October 1953. CONFIDENTIAL The purpose of this study was to determine the effectiveness of 2 ju7ticular bearing is the locating of the radiation source with respect the eerosol cloud, as indicated below: (1) At the center of an aerosol caval, (Z) At the edge of an aerosol cloud, or (3) At a certain distance Cettline tre surface of an aerosol cloud. Subject to laboratory limitations, this experiment indicated Sst°, Sor the first approximation, a 100-ft-thick fog-oil aerosol cloud having ac average concentration of 40 mmg/1 will attenuate approximately y.$ cf the radiant energy passing a point 4,500 ft from the ground zero 62 @ 20 KT atomic bomb detonated at a height of 2,400 ft. Increasing the S+etunce Srom ground zero gives a corresponding increase in the attenuation ©. Ste raiiant energy. vA qua ws # ". + at ent ee The object of this investigation was to determine the attenuation ty Tog-cil aerosols, of the radiant energy emanating from a point source. > 4 of helius cg , such - gcc+2!l esrosols in scattering and absorbing radiant energy so that, toa srprroximation, the capabilities of operational fog-oil aerosols in wee et'enuating radiant energy can be predicted. = % In a few porous soils, like ~ ‘sstes or less, the usual methods of land decontamination will remove prartically all the agent. stip - 242 1a to J eanicr eravel, an agent such as zinc bromide may penetrate to a depth of mre than lh inches. But because penetration by common RW agents is only 2 TUBES. * De: BE esils by the RW agents used is negligible. i 7 Ee The volume of water used in the Test neEEAVA LABLE COPY. penetration of most > to 150 ‘# The The activity vests was calculated to equal 39 inches of rain in one and 73 inches of rain cor 1 A ve ery contaminated by placing activated pellets on it and allowing them ees tn the test colum, dried, and counted for radioactivity. respirg on and beach sand, loamy sand, and silt loam. <t container was filled with compacted test soil and the surface of Cried se Mike. |