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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> L GW WELL-GRADED GRAVELS,GRAVEL-SAND <br /> CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES <br /> GRAVELS WITH LITTLE <br /> OR NO FINES <br /> °C� POORLY-GRADEO GRAVELS,GRAVEL-SAND <br /> (More than half of o GP MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction O <br /> is larger than <br /> I the#4 sieve) ° G M SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> i <br /> GRAINED 12% FINES GC CLAYEY GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS MIXTURES <br /> (More than half SW WELL-GRADED SANDS,SAND-GRAVEL <br /> of material CLEAN SANDS MIXTURES WITH LITTLE OR NO FINES <br /> is larger than SANDS WITH LITTLE <br /> the#200 sieve) (More than half of OR NO FINES <br /> POORLY GRADED SANDS,SAND-GRAVEL <br /> coarse fraction SP <br /> M.� is smaller than MIXTURES WITH LITTLE OR NO FINES <br /> the#4 sieve) <br /> SM SILTY SANDS,SAND-GRAVEL-SILT MIXTURES <br /> SANDS WITH <br /> OVER 12% FINES <br /> SC CLAYEY SANDS,SAND-GRAVEL-Ct.AY MIXTURES <br /> INORGANIC SILTS&VERY FINE SANDS, <br /> ML SILTY OR CLAYEY FINE SANDS, <br /> id CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYS INORGANIC CLAYS OF LOW TO MEDIUM <br /> CL PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, <br /> FINE (Liquid limit less than 50) — SILTY CLAYS,LEAN CLAYS <br /> GRAINED — <br /> SOI LS — O L ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> _ OF LOW PLASTICITY <br /> (More than half MH INORGANIC SILTS,MICACEOUS OR <br /> of material DIATOMACEOUS FINE SAND OR SILT <br /> is smaller than <br /> the#200 sieve) SILTS AND CLAYS <br /> CH INORGANIC CLAYS OF HIGH PLASTICITY, <br /> (Liquid limit greater than 50) FAT CLAYS <br /> } M O H ORGANIC CLAYS&ORGANIC SILTS <br /> OF MEDIUM-TO-HIGH PLASTICITY <br /> rillHIGHLY ORGANIC SOILS PT PEAT,HUMUS,SWAMP SOILS WITH HIGH <br /> ORGANIC CONTENT <br /> a <br /> N UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> k4KLE11 N FELDR SOIL SUITABILITY STUDY <br /> ° 25859 AND 25901 N. WATKINSON ROAD <br /> �1 Q' <br /> N ACAMPO, CALIFORNIA 3 <br /> I <br /> L) Drafted BY: G GOMEZ Project No.: 57556.G01 <br /> X Date: 6/10/2005 File Number: ST05G112 <br /> Copymght Neinielder,Ift,2005 <br /> 3 <br />