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UNIFIED SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS SYMBOL TYPICAL DESCRIPTIONS i GW WELL-GRADED GRAVELS,GRAVEL-SAND CLEAN GRAVELS �' MIXTURES WITH LITTLE OR NO FINES WITH LITTLE GRAVELS OR NO FINES ( o� MIXTURES WITHDITTLE OR NO FINES SAND More than half of G P coarse fraction C) is larger than the#4 sieve) GM SILTY GRAVELS,GRAVEL-SILT-SAND GRAVELS MIXTURES COARSE WITH OVER GRAINED 12% FINES GO CLAYEY GRAVELS,GRAVEL-SAND-CLAY SOILS MIXTURES (More than halfS W WELL-GRADED SANDS,SAND-GRAVEL of material CLEAN SANDS MIXTURES WITH'LITTLE OR NO FINES is larger than SANDS WITH LITTLE the#200 sieve) (More than half of OR NO FINES coarse fraction SP POORLY-GRADED SANDS,SAND-GRAVEL is smaller than MIXTURES WITH LITTLE OR NO FINES the#4 sieve) SM SILTY SANDS,SAND-GRAVEL-SILT MIXTURES 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 _ ORGANIC SILTS&ORGANIC SILTY CLAYS SOILS OL OF LOW PLASTICITY (More than half MH INORGANIC SILTS,MICACEOUS OR of material 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 O H ORGANIC CLAYS&ORGANIC SILTS OF MEDIUM-TO-HIGH PLASTICITY HIGHLY ORGANIC SOILS PT PEAT, HUMUS, SWAMP SOILS WITH HIGH ORGANIC CONTENT a — a a UNIFIED SOIL CLASSIFICATION SYSTEM PLATE AROGERS TRUCKING k4 K L E 1 N FELDER MUNFOFD AVENUE STOCKTON, CALIFORNIA /�A —1 U Orahed Ev: GDG Project No 35228.G01 r Date: 10/8/2003 File Number: ST03G229 cam•ni K�.�Ra«o-.: zooz