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L `. <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> 4 <br /> MAJOR DIVISIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> ' <br /> GW WELL-GRADED GRAVELS,GRAVEL-SAND <br /> CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES <br /> WITH LITTLE <br /> GRAVELS � <br /> ,r OR NO FINES <br /> ( o� MIIXOTURES WITHDITfLE OR NOFINES <br /> SAND <br /> More than halt of GP <br /> coarse fraction <br /> is larger than <br /> ` the k4 sieve) GM SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS MIXTURES <br /> COARSE WITH OVERXy <br /> GRAINED 12% FINES CLAYEY GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS GC' MIXTURES <br /> (More than halfS W WELL-GRADED SANDS,SAND-GRAVEL <br /> of material CLEAN SANDS MIXTURES WITH LITTLE OR NO FINES <br /> is larger than SANDS WITH LITTLE <br /> the#200 sieve) <br /> (More than half of OR NO FINES SP POORLY-GRADED SANDS,SAND-GRAVEL <br /> coarse fraction MIXTURES WITH LITTLE OR NO FINES <br /> is smaller than <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 /> r` <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 _ ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> SOILS OL OF LOW PLASTICITY <br /> r <br /> (More than half MI'I INORGANIC SILTS,MICACEOUS OR <br /> of material DIATOMACEOUS FINE SAND OR SILT <br /> is smaller than <br /> the 9200 sieve) SILTS AND CLAYS <br /> r CH FAT <br /> 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 /> do <br /> HIGHLY ORGANIC SOILS ' PT PEAT, HUMUS,SWAMP SOILS WITH HIGH <br /> J_` ORGANIC CONTENT <br /> 0 <br /> i" <br /> 'a <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> m SPERRY PROPERTY <br /> K L E I N FELDER MACALLEN ROAD <br /> STOCKTON, CALIFORNIA <br /> N A-1 <br /> y Drafted By: GDG Project No.: 36012.1301 <br /> Dale: 11/20;2003 File Number: ST03G274 ____ <br /> r <br />