Surface roughnesseffects are simulated by using Beck’s values* of (mR/h)/(uCi/m’) for a relaxation length of 0.16 g/cm’. According to Beck, the concentration of fallout varies exponentially with soil depth, Z, according to the relation C = C,e~**. He defines relaxation length as 1/a. Fractionation effects were simulated by the removalof a fraction of the refractory nuclides from the calculation. In general, air drops were assumed to be unfractionated, surface and cratering Events were assumed to have0.4 of the refractory elements present, and all other Events were assumed to have 0.5 of the refractory elements present. Each Appendix contains 11 pagesof calculated results relating to one Event in Table 1. Eachset of 11 pages is marked Page 2 through Page 12 at the top and A2 through A12 (or B2 through B12, etc.) at the bottom. Page 2 of each set gives the external gamma-ray exposure rates and associated values oftotal microcuries per square meter at 30 decay intervals and at zero time. Note that the totals at zero time include only the nuclideslisted in Pages 3 through 12, notall the nuclides present at zero time. Calculated values for each radionuclide at various decay intervals are given in the remaining pages—from 1 to 21h in Pages 3-7, from 1 to 300d in Page 8-11, and from 1 to 50 y in Page 12. Unless otherwise indicated, the value for each nuclide at zero timeis the result of a radiochemical measurement. The measurements were performed on debris samples taken by aircraft approximately 1 to 4h after detonation. The production of nuclides designated by (*) has been estimated. When no estimate could be made, the value appears as zero. REFERENCES 1. Announced United States Nuclear Tests, July, 1945, through December, 1980, Office of Public Affairs, 2. H.G. Hicks, Calculation of the Concentration of Any Radionuclide Deposited on the Ground by Fallout from Nevada Operations Office, Department of Energy, Las Vegas, NV, NVO-209, Rev. 1, January 1981. a Nuclear Detonation, Lawrence Livermore National Laboratory, Livermore, CA, Preprint UCRL-86177 (1981). Accepted for publication in Health Physics. 3. E. Hardy, Plutonium in Soil Northeast of the Nevada Test Site, Environmental Measurements Laboratory, 4, H.L. Beck, Exposure Rate Conversion Factors for Radionuclides Deposited on the Ground, Environmental Measurements Laboratory, Department of Energy, New York, NY, EML-387, July, 1980. Department of Energy, New York, NY, HASL-306, pg. 1-51, July 1, 1976. DPH/cc