230 TRANSURANIC ELEMENTS IN THE ENVIRONMENT 



TABLE 4 Comparison of the Predicted Concentration in Air Using a Mass Loading 

 of 100 idg/m^ with Measured Concentrations* 



*Based on data from Anspaugh, Shinn, and Wilson (1974) and Anspaugh et al. (1975). 



nuclides in the air were compared with a concentration calculated from the quantity of 

 the nucUde in the soil assuming a mass loading of 100 /ig/m^. These results are given in 

 Table 4. 



The agreement between calculated and predicted values is good. Of course, the 

 sources for the natural isotopes are large in area. However, the values at NTS show 

 reasonable agreement between calculation and prediction. It is believed that the soil 

 concentration at the point of sampUng was used for the predicted values. If this were the 

 case, the discrepancy between the two results at GZ is explainable on the basis that the 

 concentration in the soil is highest at this point and the measured dust arose from 

 surrounding areas of lower concentration. 



Discussion 



This review covered concepts and numerical values related to tlie resuspension problem 

 and did not include the important conceptual and modeling studies that have been carried 

 out by several individuals, including Amato (1971), Trevino (1972), Horst (1976), and 

 Slinn (1978). This was done dehberately in order to focus on the nonmathematical 

 aspects of the problem and to attempt to bring the factors of importance into focus. 



It is apparent that a gratifying amount of progress has been made on the 

 determination of resuspension in the past few years. The studies by Anspaugh, Shinn, and 

 Wilson (1974) and Anspaugh etal. (1975) at NTS have shown the feasibiUty of 

 measurement of the resuspension rate in a contaminated area, and their application of the 

 mass-loading concept has added greatly to the understanding of this model. The work of 

 Gillette (1974; 1976) and Shinn et al. (1976) on the dust flux has given new insights into 

 methodology and the phenomena concerned. The studies by Selimel (1977b; 1977c), 



