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• <br /> ENCLOSURE A <br /> UNIFIED SOIL CLASSIFICATION SYSTEM CHART <br /> Major Divisions Group Typical <br /> Symbols Names <br /> o � <br /> a Well-graded gravels and gravel-sand <br /> > `o 0 a m GW mixtures little or no Anes <br /> E 0V a '- <br /> a CS <br /> n ae o c GP mixtures,little or no Anes <br /> d, a pyo <br /> oz <br /> m a c m E m GM Silty gravels,gravel-sand-silt mixtures <br /> m a a s i3 c <br /> o c GC Clayey gravels gravel-sand-clay mixtures <br /> O ° is Well-graded sands and gravelly sands,little <br /> m ° a > c SW or no Ones <br /> akom o "a <br /> w m a <br /> 'a ina `� U H Poorly graded sands and gravelly sands, <br /> m tl SA little or no fines <br /> 0 0` n t SM Silty sands sand-silt mixtures <br /> M a C C <br /> CL ° 3 " SC Clayey sands sand-clay mixtures <br /> ML Inorganic silts very fine sands,rack flour <br /> >« �� silty or clayey fine sands <br /> H V H <br /> o U E m Inorganic clays at low to medium plasticity <br /> C4 L3 0 CL gravelly clays,sandy clays silty clays,lean <br /> US Z Q� clays <br /> OL Organic silts and organic silty clays of low <br /> a plasticity <br /> o`o s MH Inorganic silts, micaceous or diatomaceous <br /> E m o Ane sands or silts,elastic silts <br /> ae o a CH Inorganic clays of high plasticity tat clays <br /> CD H a CD c <br /> v. OH Organic clays of medium to high plasticity <br /> Highly Organic Soils PT Peat,muck and other highly organic soils <br /> Fused on the material passing the 34n (75-mm)sieve <br />