28 



Table 3-1 



Sediment Grain Size Analyses for Reference Stations and Cap Stations 

 at the Portland Disposal Site, July 1992 





B5 



B7 



C3 



D5 



Description 



Dark grey silty clay 



with sand and some 



grass 



Dark grey silty clay 

 with sand 



Dark grey silty clay 

 with sand 



Dark grey lean clay 



Grain Size Analysis 



% Gravel 

 (<-l phi) 



















% Coarse Sand 

 (-1 to 1 phi) 



<1 



<1 



<1 



<1 



% Medium Sand 

 (1 to 2 phi) 



3 



4 



7 



2 



% Fine Sand 

 (2 to 4 phi) 



13 



21 



21 



4 



% Silt 

 (4 to 8 phi) 



47 



32 



43 



36 



% Clay 

 (£8 phi) 



37 



43 



28 



56 





D7 



El 



E3 



F3 



Description 



Dark grey sandy 

 silty clay 



Dark grey sandy 

 silty clay 



Dark grey silty 

 clayey sand 



Light grey lean clay 



Grain Size Analysis 



% Gravel 

 (<-l phi) 



















% Coarse Sand 

 (-1 to 1 phi) 



2 



<1 



2 



<1 



% Medium Sand 

 (1 to 2 phi) 



13 



7 



13 



2 



% Fine Sand 

 (2 to 4 phi) 



27 



30 



50 



7 



% Silt 

 (4 to 8 phi) 



33 



32 



19 



34 



% Clay 

 (£8 phi) 



25 



31 



16 



57 ! 



Monitoring Cruise at the Portland Disposal Site, July 1992 



