TRANSURANIC AND TRACER SIMULANT RESUSPENSION 285 



inhalation hazard from resuspended particles would be significantly increased. Additional 

 experimental data are needed to determine what weathering half-life or variation of 

 half-life with time should be used in hazards evaluations. 



Vegetation on a resuspension surface will decrease resuspension rates. This is rather 

 obvious but can be detlnitely concluded from decreased tracer-particle resuspension rates 

 for vehicles driven on a cheat grass area compared with those for vehicles driven on an 

 asphalt area. Since vegetation does decrease resuspension, vegetation should be retained 

 on all areas of potential surface contamination and existing surface contaminated areas 

 until constructive cleanup operations can be initiated. 



References 



Anspaugh. L. R., et al., 1969, Bio-Medical Division Preliminary Report for Project Schooner, USAEC 

 Report UCRL-50718, Lawrence Radiation Laboratory, University of California, NTIS. 



Bruns, L. L., 1976, Aerial Gamma Survey by Helicopter to Measure Surficial Contamination, in 

 Atmosphere- Surface Exchange of Particulate and Gaseous Pollutants, (1974), ERDA Symposium 

 Series, No. 38, Richland, Wash., Sept. 4-6, 1974, R. J. Engelmann and G. A. Sehmel 

 (Coordinators), pp. 675-688, CONF-740921, NTIS. 



Corley, J. P., D. M. Robertson, and F. P. Brauer, 1976, Plutonium in Siuface Soil in the Hanford Plant 

 Environs, in P-oceedings of Environmental Plutonium Symposium, Los Alamos, N. Me\., 

 Aug. 4-5, 1971, USAEC Report LA4756, pp. 85-92, Los Alamos Scientific Laboratory, NTIS. 



Hardy, E. P., 1974, Depth Distributions of Global Fallout ""Sr, '^'Cs. and ^^"-^^"Pu in Sandy 

 Loam Soil, USAEC Report HASL-286, pp. 1-2 to I-IO, Heahh and Safety Laboratory. NTIS. 



Healy, J. \V., and J. J. Fuquay, 1959, Wind Pickup of Radioactive Particles from the Ground, in 

 Progress in Nuclear Energy, Health Physics. Series XII, Vol. 1, pp. 427-436, Pergamon Press, Inc., 

 New York. 



Horst, T. W., 1976, The Estimation of Air Concentrations due to the Suspension of Surface 

 Contamination by the Wind, USAEC Report BNWL-2047, Battelle, Pacific Northwest Labora- 

 tories, NTIS. 



International Commission on Radiological Protection, 1959, Report of Committee II on Permissible 

 Dose for Internal Radiation. Pubhcation 2, p. 82, Pergamon Press, Inc., New York. 



Johnson, C. J., R. R. Tiball, and R. C. Severson, 1976, Plutonium Hazard in Respirable Dust on the 

 Surface of Soil, Science. 193: 488-490. 



Krey,P. W., 1916, Health Phys., 30(2): 209-214. 



, E. P. Hardy, C. Pachucki, R. Rourke, J. Coluzza, and W. K. Benson, 1976a, Mass Isotopic 



Composition of Global Fallout Plutonium in Soil, in Transuranium Nuclides in the Environment, 

 Symposium Proceedings, San Francisco, Nov. 17-21, 1975, pp. 671-678, STI/PUB/410, Inter- 

 national Atomic Energy Agency, Vienna. 



, et al.. 1976b, Plutonium and Americium Contamination in Rocky Flats Soil — 19 73, ERDA 



Report HASL-304, Health and Safety Laboratory, NTIS. 



, R. Knuth, T. Tamura, and L. Toonkel, 1976c, Interrelations of Surface Air Concentrations and 



Soil Characteristics at Rocky Flats, in Atmosphere -Surface Exchange of Particulate and Gaseous 

 Pollutants (1974), ERDA Symposium Series, No. 38, Richland, Wash., Sept. 4-6, 1974, R.J. 

 Engelmann and G. A. Sehmel (Coordinators), pp. 744-756, CONF-740921, NTIS. 



Maxfield, H. L., 1974, A Preliminary Safety Analysis of the B-C Cribs Controlled Zone, Report 

 ARH-3088, Appendix B4, Atlantic Richfield Hanford Company. 



Milham, R. C, J. F. Schubert, J. R. Watts, A. L. Boni, and J.C. Corey, 1976, Measured Plutonium 

 Resuspension and Resulting Dose from Agricultural Operations on an Old Field at the Savannah 

 River Plant in the Southeastern United States of America, in Transuranium Nuclides in the 

 Environment. Symposium Proceedings, San Francisco, Nov. 17-21, 1975, pp. 409-421. STI/PUB/ 

 410, International Atomic Energy Agency, Vienna. 



Mishima, J., 1964, A Review of Research on Plutonium Releases During Overheating and Fires, 

 USAEC Report HW-83668, Hanford Laboratories, NTIS. 



, 1973, Distribution of Cs-1 37 Activity During a Range Fire in the B-C Controlled Area, in Pacific 



Northwest iMboratory Monthly Activities Report. September 1973: Division of Production and 



