83 



Table 4-4 



Precap (UDM) Grab Sample Survey Grain Size Analysis Results 



Survey 



Station 



%Sand 



%Silt 



%Clay 



UDM Grab 



50N 



38.5 



40.9 



20.6 



UDM Grab 



508 



17.1 



56.9 



26.1 



UDM Grab 



50W 



30.9 



47.1 



22.0 



UDM Grab 



50ENE 



36.9 



42.6 



20.5 



UDM Grab 



50SE 



10.7 



63.8 



25.5 



UDM Grab 



50NW 



36.0 



44.5 



19.5 



UDM Grab 



CTR 



18.6 



56.3 



25.2 



UDM Grab 



50SW 



34.4 



40.2 



25.4 



UDM Grab 



50NE 



32.3 



45.9 



21.9 



UDM Grab 



Average 



28.4 



48.7 



23.0 



Table 4-5 



Precap (Pseudo-UDM) Grab Sample Fine 



Fraction Mineralogy Results 



50N 



50S 



M: 



50W ; 



tjM 



50NW 



MM 



50ENE 



Im 



50NE- Me 



m" 



50NE-RBF 



M 



50SW 



M 



50SE 



M 



I 



X ' X X 



X ^-xx 



XX X 



X 



X 



XXr X" 

 X 



:xx' 



X X 



X 



X 



X X 



X 



X 



X 



Key 



Mim. Parameter 

 Occurrence 



XX Abundant 



X Common 



X Rare 



Absent 



Grain size 



G Coarse 



M Medium 



F Fine 



The Portland Disposal Site Capping Demonstration Project, 1995-1997 



