14 



Table 2-2 

 Grain Size Scales for Sediments 



ASTM (Unlfled) ClasiMcation' 



U.S. Std. Sleve^ 



Phi (O) SIzt 



Wentworth Cl««ilflc«aon^ 



12 in (300 mm) 



3 in (75mm) 



Fine-grained Soil; 



Clay if PI ' 4 and plot of PI vs. LI 

 IS on or above "A" line 

 Sill if PI < 4 and plot of PI vs. 

 LL IS below "A" line 



and the presence of organic matter 

 does not influence LL. 



4 (4.75 mm) 

 5 



10 (2.0 mm) 



12 



14 



16 



18 



20 



25 



30 



35 

 40 (0.425 mm) 



45 



50 



60 



70 



80 



100 



120 



140 



170 

 200 (0.075 mm) 



230 



270 



325 

 400 



4096. 



1024. 



256. 



128. 



107.64 



90.51 



76.11 



64.00 



53.82 



45.26 



38.05 



32.00 



26.91 



22.63 



19.03 



16.00 



13.45 



11.31 



9.51 



8.00 



6.73 



5.66 



4,76 



4.00 



3.36 



2.83 



2.38 



2.00 



1.68 



1.41 



1.19 



1.00 



0.84 



0.71 



0.59 



0.50 



0.420 



0.354 



0.297 



0.250 



0.210 



0.177 



0.149 



0.125 



0.105 



0.088 



0.074 



0.0625 



0.0526 



0.0442 



0.0372 



0.0312 



0.0156 



0.0078 



0.0039 



0.00195 



0.00098 



0.00049 



0.00024 



0.00012 



0.000061 



-12.0 



-10.0 



-8.0 



-7.0 

 -6.75 



-6.5 

 -6.25 



-6.0 

 -5.75 



-5.5 

 -5.25 



-5.0 

 -4.75 



-4.5 

 -4.25 



-4.0 

 -3.75 



-3.5 

 -3.25 



-3.0 

 -2.75 



-2.5 

 -2.25 

 '-2.0 

 -1.75 



-1.5 

 -1.25 



-1.0 

 -0.75 



-0.5 

 -0.25 



0.0 

 0.25 



0.5 

 0.75 



1.0 



1.25 



1.5 



1.75 



2.0 

 2.25 



2.5 

 2.75 



3.0 

 3.25 



4.25 

 4.5 



4.75 



9.0 

 10.0 

 11.0 

 12.0 

 13.0 

 14.0 



Large Cobble 



Very Large Pebble 



Large Pebble 



Medium Pebble 



Very Coarse Sand 



Very Fine Sand 



Medium Silt 



Fine Sill 



Very Fine Sill 



Coarse Qav 



Medium Clav 



Fine Clav 



1 ASTM Standard D 2487-92 Thisisthe ASTM version of the Unified Soil ClassificaUon Syslam. Both systems a 



2 Note thai BnushStandanI, French, and German DIN mesh sizes and classifications are differenL 3 Wentworth si 



: similar (from ASTM (1993)) 



» (in inches) died in Knimlxin and SIcss (1963). 



Monitoring Cruise at the New London Disposal Site, August 2000 



