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/ 1 <br /> Group <br /> Primary Divisions Symbol/Graphic Typical Names <br /> • 00 <br /> COARSE GRAVELS CLEAN o o Well graded gravels, gravel-sand mixtures, <br /> GRAINED GRAVELS <br /> GW 00 little or no fines <br /> SOILS half of ° a <br /> coarse (less than GP 00 poorly graded gravels or gravel-sand mixtures, <br /> more than fraction 5%fines) a o little or no fines <br /> half is larger larger than Q o <br /> than#200 #4 sieve G Q <br /> sieve GRAVEL GM 4 o Silty gravels, gravel-sand-stit mixtures <br /> WITH a <br /> FINES GC Clayey gravels, gravel-sand-day mixtures <br /> SANDS CLEAN SW Well graded sands,gravelly sands, little or no fines <br /> SANDS <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 /> neve SANDS SM Silty sands, sand-silt mixtures <br /> WITH <br /> FINES Sc Clayey sands, sand-clay mixtures, plastic Fines <br /> • <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 plasticity, gravelly <br /> less than 50% clays, sandy days, silty days, lean clays <br /> more than <br /> half is <br /> smaller than OL Organic silts and organic Bitty clays of low plasticity <br /> #200 sieve <br /> SILTS AND CLAYS JCH <br /> Inorganic silts, micaceous or diatomaoeous tine sandy <br /> or silty sods, elastic silts <br /> liquid limit Inorganic clays of high plasticity, fat clays <br /> more than 50% <br /> Organic days of medium to high plasticity, organic silts <br /> HIGHLY ORGANIC SOILS Peat and other highly organic soils <br /> PACIFIC Unified Soil <br /> ENVIRONMENTAL <br /> GROUP INC Classification System <br />