Surface Silicate (fig/L) Surface Silicate (j_ig/L) 
800 
1200 
1000 
800 
600 
400 
200 
0 
Figure 3.2.19. Mean +1 SD surface silicate concentration compared among (A) 
all, California, and Washington sample locations, and (B) California NMS, 
California non-NMS, Olympic Coast NMS, and Washington non-NMS 
sample locations. Silicate was not measured at stations in Oregon or in 
the SCB (see text). 
53 
