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Group <br /> Primary Divisions Symbol/Graphic Typical Names <br /> COARSE GRAVELS CLEAN o � <br /> GW o 4 Well graded gravels, gravel-sand mixtures, <br /> GRAINED GRAVELS C o C little or no fines <br /> SOILS half of ° <br /> coarse (less than <br /> GP o o Poorly graded gravels or gravel-sand mixtures, <br /> more than fraction 5%fines) o Q tittle or no fines <br /> half is larger larger than '00 <br /> than#20o #4 sieve o 0 <br /> sieve GRAVEL GM o o Silty gravels, grave!-sand-silt mixtures <br /> WITH <br /> FINES GC Clayey gravels, gravel-sand-clay mixtures <br /> SANDS CLEAN 5W Well graded sands, gravelly sands, little or no fines <br /> half of SANDS <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 /> neve SANDS SM Silty sands, sand-silt mixtures <br /> WITH <br /> FINES SC Clayey sands, sand-clay mixtures, plastic fines <br /> FINE SILTS AND CLAYS ML Inorganic silts and very fine sand, rock flour, silty or <br /> GRAINED clayey fine sands or clayey silts, with slight plasticity <br /> SOILS <br /> liquid limit CL Inorganic clays of low to medium plasticrty, gravelly <br /> less than 50% clays, sandy clays, silty clays, lean clays <br /> more than <br /> half is ' <br /> smaller than OL Organic silts and organic silty clays of low plasticity <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, tat clays <br /> more than 50% <br /> OH Organic clays of medium to high plasticity, organic silts <br /> HIGHLY ORGANIC SOILSP# Peat and other highly organic sods <br /> f♦ <br /> PACIFIC Unified Soil <br /> ENVIRONMENTAL <br /> GROUP, INC classification System <br />