11. Color . Based on the Geological Society of America Rock-Color Chart. 



12. Odor. A qualitative description of any noticeable odors. 



3 



13. Wet Density (lbs ./ft . ) . Density measured to the nearest tenth of a pound 

 as determined by means of a "Mudwate" hydrometer. 



14. Rigidense (mm) . Determined by means of a Rigider.se instrument and measured 

 to the nearest millimeter. For a detailed description of this test procedure refer to: 

 Jaffe, G. and Gaetano, F. W., "A Comparison of Atterberg and Rigidense Tests for 

 the Measure of Plasticity," U.S. Navy Hydrographic Office Technical Report No. 11, 

 May 1955. 



15. Maximum Porosity (%) . The percentage of pore space in the total volume of 

 the uncompacted sample not occupied by solid matter; computed by the formula, 



P = 100 (V ~w)/ where P is the porosity in percent, V is the bulk volume, and v is 

 the aggregate volume of the grains. 



16. Minimum Porosity (%) . The percentage of pore space in the total volume of 

 the compacted sample not occupied by solid matter; computed by the same formula as 

 given in maximum porosity. 



17. Water Content (%) . Based on dry weight of the sample and measured to the 

 nearest whole percent. 



18. Organic Content (%) . Based on the Schollenberger method of organic carbon 

 determination by reduction of chromic acid and expressed to the nearest hundredth 

 percent . 



19. Size Analysis . Sample size fraction values are based on dry weight and given 

 in phi ($ units to the nearest whole percent. An American Instrument Company sieving 

 machine and U. S. Standard sieves are used for determining sand and larger size frac- 

 tions. The pipette method of analysis was used for determining the silt and clay fractions. 



QD/ - (phi quartile deviation). Is that statistical parameter which is a 

 measure of one half of the spread of the quartiles and is expressed in phi units 

 to the nearest tenth with the given value computed from the formula: 



QD/ = 



Q v " °v 



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