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UNIFIED SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS USCS TYPICAL SYMBOL DESCRIPTIONS GW WELL-GRADED GRAVELS,GRAVEL SAND CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES WITH LITTLE - GRAVELS OR NO FINESGP POORLY GRADED GRAVELS GRAVEL SAND (More than half of dw MIXTURES WITH LITTLE OR NO FINES coarse fraction is larger than GM SILTY GRAVELS GRAVEL SILT SAND the#4 sieve) GRAVELS 147 MIXTURES iCOARSE WITH OVER GRAINED 12% FINES GC CLAYEY GRAVELS GRAVEL SAND CLAY SOILS MIXTURES i (More than half - - _ WELL-GRADED SANDS SAND GRAVEL j. of material - SW MIXTURES WITH LITTLE OR NO FINES is larger than CLEAN SANDS -- the #200 sieve) WITH LITTLE SANDS OR NO FINES SP POORLY-GRADED SANDS SAND GRAVEL (More than half of MIXTURES WITH LITTLE OR NO FINES I coarse fraction is smaller than SM SILTY SANDS SAND-GRAVEL SILT MIXTURES the #4 sieve) SANDS WITH OVER 12% FINES SC CLAYEY SANDS SAND GRAVEL CLAY MIXTURES INORGANIC SILTS&VERY FINE SANDS ML SILTY OR CLAYEY FINE SANDS CLAYEY SILTS WITH SLIGHT PLASTICITY SILTS AND CLAYS INORGANIC CLAYS OF LOW TO MEDIUM CL PLASTICITY GRAVELLY CLAYS, SANDY CLAYS (Liquid limit less than 50) SILTY CLAYS LEAN CLAYS FINE GRAINED OL ORGANIC SILTS&ORGANIC SILTY CLAYS SOILS OF LOW PLASTICITY (More than half INORGANIC SILTS MICACEOUS OR of material MH DIATOMACEOUS FINE SAND OR SILT ' is smaller than the #200 sieve) SILTS AND CLAYS CH INORGANIC CLAYS OF HIGH PLASTICITY (Liquid limit greater than 50) FAT CLAYS OH ORGANIC CLAYS&ORGANIC SILTS OF MEDIUM TO HIGH PLASTICITY HIGHLY ORGANIC SOILS — PT PEAT,HUMUS SWAMP SOILS WITH HIGH ORGANIC CONTENTS UNIFIED SOIL CLASSIFICATION SYSTEM PLATE k4K LEI NFELDER HWY 1201McHENRY AVENUE PROJECT o Drafted By DwA ][!Prolect No 20-3941-01 1305 ESCALON AVENUEA_Y Date 314197 ile Number ESCALON, CALIFORNIA Copynght Kleintelder Inc 1997