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Group <br /> Primary Divisions Symbol/Graphic Typical Names <br /> o0 <br /> COARSE GRAVELS CLEANGW o o 10 Well graded gravels, gravel-sand mixtures, <br /> GRAINED GRAVELS O o C little or no fines <br /> SOILS half of <br /> coarse <br /> fraction (less than GP o o Poorly graded gravels or gravel-sand mixtures, <br /> more than 5%fines) 00C little or no fines <br /> half is larger larger than o 0 <br /> sieve o 0 <br /> than#200 GRAVEL GM o ; cl Silty gravels, gravel-sand-silt mixtures <br /> 00 <br /> WITH <br /> FINES GC Clayey gravels, gravel-sand-day mixtures <br /> SANDS SANDS CLEAN SW Well graded sands, gravelly sands, little or no fines <br /> half of <br /> coarse (less than <br /> fraction 5%fines) SP Poorly graded sands or gravelly sands, little or no fines <br /> smaller <br /> than #4 <br /> sieve SANDS SM Silty sands, sand-silt mixtures <br /> WITH <br /> i FINES SC Clayey sands, sand-day mixtures, plastic fines <br /> ML Inorganic silts and very fine sand, rock flour, silty or <br /> FINE SILTS AND CLAYS 9 ry �' <br /> GRAINED clayey fine sands or clayey silts,with slight plasticity <br /> SOILS <br /> liquid limit CL Inorganic days of low to medium plasticity, gravelly <br /> more than less than 50% clays, sandy clays, silty days, lean clays <br /> half is <br /> smaller than OL Organic silts and organic silty clays of low plasbcity <br /> #200 sieve <br /> SILTS AND CLAYS MH Inorganic silts, micaceous or diatomaceous fine sandy <br /> or silty soils, elastic silts <br /> liquid limit CH Inorganic clays of high plasticity, fat clays <br /> more than 50% <br /> OH Organic clays of medium to high plasticity, organic silts <br /> *`;Nt <br /> HIGHLY ORGANIC SOILS Pt ++ Peat and other highly organic soils <br /> PACIFIC Unified Soil <br /> ENVIRONMENTAL <br /> `� GROUP INC Classification System <br />