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"nsxa!xa acaer :nss <br /> K <br /> UNIFIED SOIL CLASSIFICATION niSTEM <br /> GROUP <br /> PRIMARY DIVISIONS SYMBOL TYPICAL NAMES <br /> COARSE GRAVELS CLEAN G4 Well graded gravels, gravel-sand mixtures: <br /> GRAINED half of GRAVELS little or no fines <br /> SOILS coarse (leas <br /> fraction than 5% GF Poorly graded gravels or gravel-sana <br /> more than larger finest mixtures: little or no fines <br /> half is than <br /> larger 84 sieve GRAVEL GM Silty gravels, gravel-sand-silt mixtures <br /> I than WITH <br /> 8240 FINES GC Clayey gravels, gravel-sand-clay mixtures <br /> - sieve <br /> SANDS CLEAN SW Well graded sands, gravelly sands. Iittle <br /> half of SANDS or no fines <br /> coarse (less <br /> fraction than 5% SP Poorly graded sands. or gravelly sands. , <br /> smaller fines) little or no fines <br /> than # 4 <br /> sieve SANDS SM Silty sands. sand-silt mixtures i <br /> WITH = , <br /> FINES SC Clayey sands. sand-clay mixtures, plastic <br /> fines ` <br /> F FINE SILTS AND CLAYS ML Inorganic slits and very fine Sanas, rock } <br /> GRAINED .•liquid limit flour, silty or clayey fire sanas or <br /> SOILS less than 50% clayey silts, with slight plasticit, r . <br /> Store than CL Inorganic clays of low to oedium <br /> half is plasticity, gravelly clays, sanay clays <br /> smaller silty clays,' lean clays.. <br /> .than <br /> IZOO OL Organic silts and organic silty ciays.'- <br /> sieve of tow plasticity <br /> SILTS AND CLAYS MH inorganic silts, micaceous or <br /> liquid. limit diatomaceous fine sandy or silty <br /> u less than 50% soils. elastic silts <br /> CN Inorganic clays of high plastic:tv, :a: <br /> + clays <br /> OH Organic clays of medium to high <br /> -.— - - ---- - - --- - .-- - --- plasticity,-arganIc.-silts --- --- - -- <br /> HIGHLY ORGANIC:SOILS Pt Peat and other highly. organic soils <br /> r <br /> � I <br /> r <br /> PACIFIC ENVIRONMENTAL GROUP, INC: <br />