made comparison more ambiguous and demonstrated the need for a source-specific model of atmospheric transport and diffusion. Such a model had been derived for the GMX location by J. Healy (1974) of LASL, and through its use, it was possible to derive resuspension rates (the fraction of the areal source that is resuspended per unit time) for the GMX source. These results were also consistent with those predicted by the mass flux model. The mass flux model and Healy's resuspension rate model were combined to derive an integrated approach to development of a general predictive model of resuspension. An interesting result is the derivation of an expression which relates resuspension rate to the older, frequently used parameter resuspension factor. This relationship is general for locations close to the maximum ground deposition and involves three micrometeorological parameters. STUDIES IN PROGRESS A mobile field laboratory has been established for measurement of suspended dust concentrations and micrometeorological parameters at various locations at the NTS. This equipment is being used to test previously derived parameterizations which relate concentration of suspended dust to friction velocity and soil erodibility. These results, if verified, will also have general applicability to prediction of the resuspension of aged radionuclide deposits. Experiments with this system have been con- ducted at three sites. An isokinetic air sampler and appropriate meteorological sensors are being installed on a small aircraft under the direction of P. Sinclair of Colorado State University. This system will be used to measure mass loadings in dust devils at the NTS. This data, in combination with data on the occurrence frequency of dust devils, will be used to assess the significance of such episodic events upon overall resuspension process. 95