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�ft_ 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 u POORLY-GRADED GRAVELS,GRAVEL-SAND <br /> (More than half of oc GP MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction O <br /> is larger than <br /> the#4 sieve) o GM SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINES <br /> SOILS GC CLAYEY GRAVELS,GRAVEL-SAND-CLAY <br /> MIXTURES <br /> (More than half S 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 /> coarse fraction <br /> is smaller than MIXTURES WITH LITTLE OR NO FINES <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 — ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> OL OF LOW PLASTICITY <br /> (More than half MH INORGANIC SILTS,MICACEOUS OR <br /> of material DIATOMACEOUS FINE SAND OR SILT <br /> is smaller than <br /> the#200 sieve) SILTS AND CLAYS <br /> C H INORGANIC 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 /> 'a <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> K L E I N F E L D E R 17777 LIBERTY ROAD <br /> 0 <br /> y SAN JOAQUIN COUNTY, CALIFORNIA <br /> A- 1 <br /> 0. Drafted By: GDG Project No.: 36600.GOi <br /> Date: 10/15/2003 File Number: ST03G236 <br /> CryryrignlNkinlNier IM.2MJ <br />