LIST OF FIGURES (cont.) 



Page 



Figure 3-10. Surface sediment density (gcc 1 ) for the Portland Disposal Site 27 



Figure 3-11. Normalized zinc values in surface sediments at the Portland Disposal Site, 



July 1992 34 



Figure 3-12. Normalized lead values in surface sediments at the Portland Disposal Site, 



July 1992 35 



Figure 3-13. Normalized copper values in surface sediments at the Portland Disposal Site, 

 July 1992 36 



Figure 4-1. Barge disposal release points at the Portland Disposal Site, October 



1991 to June 1992 39 



Figure 4-2. Accumulation of sediment, distribution of dredged material, and barge 

 release locations at the Portland Disposal Site between January 1989 

 and June 1992 40 



