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UNIFIED SOIL CLASSIFICATION SYSTEM i MAJOR DIVISIONSUSCS TYPICAL SYMBOL DESCRIPTIONS 11.46— . 6 GW WELL GRADED GRAVELS GRAVEL SAND CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FJNES WITH LITTLEf GRAVELS OR NO FINES "1 °O POORLY-GRADED GRAVELS GRAVEL SAND coarse fraction (More than half of O GP MIXTURES WITH LITTLE OR NO FINES � is larger than the 44 sieve) ° GM SILTY GRAVELS GRAVEL SILT SAND GRAVELS MIXTURES COARSE WITH OVER GRAINED 12% FINES CLAYEY GRAVELS,GRAVEL SAND-CLAY SOILS GC' MIXTURES (More than halfWELL-GRADED SANDS SAND GRAVEL of material CLEAN SANDS SW MIXTURES WITH LITTLE OR NO FINES is larger than SANDS WITH LITTLE the#200 sieve) (More than half of OR NO FINES coarse fraction S P POORLY GRADED SANDS SAND GRAVEL is smaller than MIXTURES WITH LITTLE OR NO FRES the#4 sieve) SM SILTY SANDS, SAND-GRAVEL SILT MIXTURES SANDS WITH OVER 120% 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, FINE (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS GRAINED _ SOILS OL ORGANIC SILTS&ORGANIC SILTY CLAYS OF LOW PLASTICITY (More than half INORGANIC SILTS MICACEOUS OR of matenat fC H DIATOMACEOUS FINE SAND OR SILT is smaller than the#200 sieve) SILTS AND CLAYS H INORGANIC CLAYS OF HIGH PLASTICITY (Liquid limit greater than 50) FAT CLAYS OH ORGANIC CLAYS&ORGANIC SILTS OF MEDIUM-TO HIGH PLASTICITY i LOAMS i ' i UNDER USDA SOIL CLASSIFICATION SYSTEM v SOIL OF APP9OXIMATELY EQUAL SANDISILT/CLAY UNIFIED SOIL CLASSIFICATION SYSTEM flL Tc K L E I N F E L D E R COUNTRY CLUB SEWER TRUNK STOCKTON CALIFORNIA A-1 Dratted Rv GDG °rolect rte 1^1029 C-01 Date 127,2002 �:ne NEimeer 2002G21 .. mrgnt nleinieitle nc �7�G