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UNIFIED SOIL CLASSIFICATION SYSTEM USCS TYPICAL .r MAJOR DIVISIONS SYMBOL DESCRIPTIONS 7-4 GW WELL-GRADED GRAVELS,GRAVEL-SAND $ CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES , WITH LITTLE - n GRAVELS OR NO FINESGP POORLY-GRADED GRAVELS,GRAVEL-SAND (More than half of MIXTURES WITH LITTLE OR NO FINES coarse fraction is larger than GM SILTY GRAVELS, GRAVEL-SILT-SAND the#4 sieve) GRAVELS MIXTURES `r COARSE WITH OVER GRAINED 12% FINES GC CLAYEY GRAVELS,GRAVEL-SAND-CLAY SOILS MIXTURES (More than half WELL-GRADED SANDS,SAND-GRAVEL of material SW is larger than CLEAN SANDS MIXTURES WITH LITTLE OR NO FINES the#200 sieve) WITH LITTLE SANDS OR NO FINES SP POORLY-GRADED SANDS,SAND-GRAVEL (Mare than half of MIXTURES WITH LITTLE OR NO FINES coarse fraction y 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 V CL PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS FINE GRAINED OL ORGANIC SILTS&ORGANIC SILTY CLAYS v SO/LS 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 ..r 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 k" K L E I N F E L D E R HWY 120/McHENRY AVENUE PROJECT 5 Drafted By: DWA Project No.: 20-3941-01 1305 ESCALON AVENUE A- 1 Y Date: 3/4/97 File Number: ESCALON, CALIFORNIA Copyright Kleinfelder,Inc.1997