12 TRANSURANIC ELEMENTS IN THE ENVIRONMENT 



1.0 



0.1 



0.01 



£ 0.001 



n 

 O 



c 

 E 



0.0001 



A. A , 



^■■\(-^ " ^^■ 



<\ r\i 



J \ I L 



1 \ I \ r 



238pu 



A 



\ I ■ 



•- A 



U*^ '*' l\ 



J I L 



J\J: 



J I L 



< 



cc 



I- 



o 

 z 

 o 

 o 



10 



1.0 



0.1 



0.01 



0.001 



iJ^ 



■V..A A. .A. 



I I r 





239,240pu 





\ i 



J L 



lOr 



1.0 r- 



1 r 



< 0.1 



0.01 



0.001 



SNAP 

 burnup 



I I \ r 



238pu/239, 240 py 



I 



J L 



1962 1964 1966 1968 1970 1972 1974 1976 



YEAR 



Fig. 7 Concentrations of ^^*Pu and ^^''^""Pu in surface air at Richland, Wash. 



