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y <br /> I Group _ <br /> Primary Divisions Symbol/Graphic Typical Names <br /> COARSE GRAVELS CLEANo a Well graded gravels, gravel-sand mixtures, <br />' GRAINED GRAVELS GW O 0 t little or no fines <br /> SOILS half of ° ° <br /> voc <br />' coarse 0 <br /> fraction (less than GP o Poorly graded gravels or gravel-sand mixtures, <br /> more than larger than 5%fines) 00 little or no fines <br /> half is larger #4 Steve 00 <br />' th StGRAVEL GM 4 0 <br /> Steve <br /> Silty gravels, gravel-sand-silt mixtures <br /> WITH <br />' FINES GC Clayey gravels, gravel-sand-clay mixtures <br />' SANDS GLEAN 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 /> sieve 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 plasticity, gravelly <br />' less than 50% IVA IVA <br /> clays, sandy clays, silty days, 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, fat clays <br /> more than 50% <br />' OH Organic clays of medium to high plasticity, organic silts <br /> HIGHLY ORGANIC SOILS Pt- # Peat and other highly organic soils <br /> PACIFIC Unified Soil <br /> ENVIRONMENTAL_ <br /> GROUP, INC _ Classification System <br /> 1 <br />