day) at an elevation of 91m. The flux decreased to 1.2 x 1078 yuCi/(m? At this highest sampling elevation, the day) at an elevation of 122 m. flux on large particles was 1.4 x 1078 yci/ (m2 day). Thus, the percent of total americium-241 flux on small particles was 45% at an elevation of 122 m. This percent flux on small particles is shown on the right side of the figure. Similarly, the americium-241 flux on large particles was 5 x 107’ yCi/(m? day) at a sampling height of 1.9 m. At this lowest sampling elevation, the percent of total americium-241] flux on small particles was 0.5%. Americium-241 fluxes on large particles are not shown between 1.9- and 122-m sampling height since the radiochemical results were less than radiochemical counting detection limits. CONCLUSIONS Both plutonium-239 and americium-241 concentrations were measured for sampling heights up to 122 m. Results are reported uCi/em3, uCi/g of airborne soil, and average fluxes in uCi/(m* day) for both large and small particles. The small particles are in the respirable diameter range. Since results were determined for heights up to 122 m, these experimental data are the first to show plutonium-239 and americium241 concentration profiles to those heights. However, even at a sampling height of 122 m, the airborne plutonium-239 and americium-241 plumes were probably not contained. Some correlation is suggested between americium-241 transport on small particles and plutonium-239 transport on large particles. This apparent correlation needs further validation at other sites and time periods. Americium-24]1 has been studied even less than plutonium-239 resuspension. Nevertheless, americium-241 resuspension could become a potential inhalation concern of the future when americium-241 grows in as a daughter of plutonium-241 at aged plutonium resuspension sources. In addition to showing americium-241 transport by resuspension, these data also show plutonium-239 and americium-241 are transported on both small and large particles. Although transport on large particles does not present an immediate inhalation concern, transuranics transported on large particles could present a subseauent inhalation concern. After these large particles are deposited, small particles can be released from the larger host soil particles (Sehmel, 1978). If transuranics, these released smail particles could then be sources for subsequent resuspension in the inhalation diameter range. Experimental data are needed to develop and validate transport models for both respirable and nonrespirable particles as well as plutonium-239 and americium-241 detachment from large particles. 720