79 



Grab UDM 



Sand 

 28% 



Core UDr 



Core AMB 



Clay 

 14% 



Sand 

 73% 



Core CDM 



Clay 

 13% 



Figure 4-18. Mean grain size analysis results for precap (pseudo-UDM) grab samples and 

 postcap (CDM) core samples. Core layers determined by visual observations 

 and microfossil content 



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



