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GENERAL TERMINOLOGY NOTES FOR <br /> SOIL IDENTIFICATION AND DESCRIPTION <br /> GRAIN SIZE GRAVEL PERCENTAGES <br /> Term ASTM AASHTO Term Percent <br /> Boulders Over 12" Over 3" A Little Gravel 3%-15% <br /> Cobbles 3" to 12" - With Gravel 15%-30% <br /> Gravel #4 sieve to 3" #10 sieve to 3" Gravelly 30%-50% <br /> Sand #200 to #4 sieve #200 to #10 sieve <br /> Fines (silt Pass #200 sieve Pass #200 sieve <br /> &clay) <br /> CONSISTENCY OF PLASTIC SOILS RELATIVE DENSITY OF NON-PLASTIC <br /> SOILS <br /> Term N-Value. BPF Term N-Value, BPF <br /> Very Soft less than 2 Very Loose 0-4 <br /> Soft 2-4 Loose 5-10 <br /> Medium 5-8 Medium Dense 11-30 <br /> Stiff 9-15 Dense 31-50 <br /> Very Stiff 16-30 Very Dense Greater than 50 <br /> Hard Greater than 30 <br /> FIBER CONTENT OF PEAT (ASTM D4427) ORGANIC DESCRIPTION (ASTM D2488) <br /> Term Fiber Content(Visual Estimate) Non-peat soils are described as organic, if soil <br /> is judged to have sufficient organic content to <br /> Fibric Greater than 67% influence the soil properties. <br /> Hemic 33-67% <br /> Sapric Less than 33% <br /> LAYERING NOTES <br /> Laminations - Layers less than 1/2" thick of differing material or color <br /> Lenses - Pockets or layers greater than 1/2" thick of differing material or color <br /> AMERICAN ENGINEERING TESTING, INC. <br />