248 TRANSURANIC ELEMENTS IN THE ENVIRONMENT 



10" 



10 



-5 



> 





X 



3 

 O- 

 co 



O 



CO 



10" 



< 10-^ 



CO 



< 



cc 



Q- 



10" 



10" 



t 



Site A 



Sampling height, m 



♦ 0.3 



■ 1 



• 2 

 A 10 



± 



t t 



Site AB Site B 



I I 



200 400 600 800 1000 



DISTANCE FROM SITE A, m 



Fig. 9 Decrease with distance of total ^ ^ ' Pu flux on nonrespirable particles at Rocky 

 Flats. 



site AB to B, an unexplained observation was made. Airborne ^^^Pu fluxes at 2 and 10 m 

 heights at site B were greater than those at site AB. An explanation for this increase is not 

 apparent, but the increase is supported by comparing plutonium analyses uncertainties. 

 Error bars for site B show a ^^^Pu tlux range significantly above error bars around 

 site AB. 



Nonrespirable airborne fluxes at Rocky Flats were greatest near the original oil 

 storage area (source of contaminated leakage) and near ground level. Fluxes of ^^^Pu 

 ranged from 10^^ up to 10"^ jjC'x m"^ day" ' . hi contrast, fluxes of ^^^Pu ranged from 



10~^ to 10"^ MCi 



m 



day' 



Nonrespirable airborne plutonium fluxes around the U-Pond within the Hantord area 

 are shown in Fig. 10. The ^^^Pu flux was less than the ^-^^Pu flux. This decrease is 



