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U <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> GW WELL-GRADED GRAVELS,GRAVEL-SAND <br /> CLEAN GRAVELS : MIXTURES WITH LITTLE OR NO FINES <br /> GRAVELS WITH LITTLE <br /> OR NO FINES <br /> ° POORLY-GRADED GRAVELS,GRAVEL-SAND <br /> (More than half of o G P <br /> coarse fraction MIXTURES WITH LITTLE OR NO FINES <br /> Q <br /> is larger than <br /> the#4 sieve) GM SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINES CLAYEY GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS GC MIXTURES <br /> (More than halfS.W WELL-GRADED SANDS,SAND-GRAVEL <br /> of material SANDS CLEAN SANDS MIXTURES WITH LITTLE OR NO FINES <br /> is larger than WITH LITTLE <br /> the#200 sieve) <br /> (More than half of OR NO FINES SP POORLY-GRADED SANDS,SAND-GRAVEL <br /> coarsefraction <br /> is smaller than MIXTURES WITH LITTLE OR NO FINES <br /> is smaller <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-CLAY MIXTURES <br /> INORGANIC SILTS&VERY FINE SANDS, <br /> M L SILTY OR CLAYEY FINE SANDS, <br /> CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYSINORGANIC CLAYS OF LOW TO MEDIUM <br /> CL <br /> PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, <br /> (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS <br /> FINE _ <br /> GRAINED <br /> SOILS _ OL ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> OF LOW PLASTICITY <br /> (More than half INORGANIC SILTS,MICACEOUS OR <br /> of material MH DIATOMACEOUS FINE SAND OR SILT <br /> is smaller than <br /> the#200 sieve) SILTS AND CLAYS <br /> CH FAT <br /> CLAYS OF HIGH PLASTICITY, <br /> (Liquid limit greater than 50) FAT CLAYS <br /> OH ORGANIC CLAYS&ORGANIC SILTS <br /> OF MEDIUM-TO-HIGH PLASTICITY <br /> HIGHLY ORGANIC SOILS PT PEAT,HUMUS,SWAMP SOILS WITH HIGH <br /> ORGANIC CONTENT <br /> a' <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> K L E I N F E L D E R GILLIES TRUCKING OFFICE <br /> 3851 N. NEWTON ROAD <br /> STOCKTON, CALIFORNIA A-1 <br /> w Drafted By: GDG Project No-: 37210.G01 <br /> x Date: 11112/2003 File Number: ST03G266 <br /> (:.""N NkN'..Inc 20°9 <br />