10 



1 5t 



SACO BA Y Reference Areas 

 Frequency Distribution 



N=9 



H 1 1 1 1 1 4* 1 ' t r <f T h- 



1 23456789 10 11 

 ORGANISM-SEDIMENT INDEX 



10 





SACOBA Y Disposal Area 

 Frequency Distribution 



N=30 



a 



1 23456789 10 11 

 ORGANISM-SEDIMENT INDEX 



Figure 3-13. Frequency distributions of Organism-Sediment Index 

 (OSI) values at Saco Bay Disposal Site and 

 reference stations, May 1990. 



