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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS USCS TYPICAL <br /> SYMBOL DESCRIPTIONS <br /> +� GW WELL-GRADED GRAVELS GRAVEL SAND <br /> ' <br /> CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES <br /> # <br /> WITH LITTLE f <br /> GRAVELS OR NO FINESGP POORLY-GRADED GRAVELS GRAVEL SAND <br />' <br /> (More than half of MIXTURES WITH LITTLE OR NO FINES <br /> _� <br /> coarse fraction <br /> Is larger then GM SILTY GRAVELS GRAVEL-SILT-SAND <br />' the#4 sieve) GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINES GC CLAYEY GRAVELS GRAVEL-SAND-CLAY <br /> SOILS MIXTURES <br /> IMore than half - - <br /> _ WELL-GRADED SANDS SAND-GRAVEL <br /> of material - SW MIXTURES WITH LITTLE OR NO FkNES <br /> is larger than CLEAN SANDS __ <br /> the #200 sieve) WITH LITTLE <br /> SANDS OR NO FINES SP POORLY GRADED SANDS SAND-GRAVEL <br /> (More than half of MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction <br /> Is smaller than SM SILTY SANDS SAND-GRAVEL SILT MIXTURES <br /> the #4 sieve) SANDS WITH <br /> OVER 1296 FINES <br /> SC CLAYEY SANDS SAND GRAVEL-CLAY MIXTURES <br /> INORGANIC SILTS&VERY FINE SANDS <br /> ML SILTY OR CLAYEY FINE SANDS <br /> CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYS INORGANIC CLAYS OF LOW TO MEDIUM <br /> tCL PLASTICITY GRAVELLY CLAYS SANDY CLAYS <br /> (Liquid limit less than 50) SILTY CLAYS LEAN CLAYS <br /> FINE <br /> GRAINED OL ORGANIC SILTS&ORGANIC SILTY CLAYS <br />' SOILS OF LOW PLASTICITY <br /> (More than half INORGANIC SILTS MICACEOUS OR <br />' of material MH DIATOMACEOUS FINE SAND OR SILT <br /> Is smaller than 11 1 <br /> the #200 sieve) SILTS AND CLAYS INORGANIC CLAYS OF HIGH PLASTICITY <br /> (Liquid limit greater than 50) CH FAT CLAYS <br />' ORGANIC CLAYS&ORGANIC SILTS <br /> OH OF MEDIUM-TO HIGH PLASTICITY <br /> HIGHLY ORGANIC SOILS M.Mr- PT PEAT HUMUS SWAMP SOILS <br /> WITH HIGH ORGANIC CONTENTS <br /> i <br /> k%1 KLEIN FELDER UNIFIED SOIL. CLASSIFICATION SYSTEM PLATE <br />' INDEPENDENT TRUCKING COMPANY <br /> Drafted By dwa Project No 23-482276 ADD 1 145 W CHARTER C- 1 <br /> Date 8131195 1 File Number 0295 STOCKTON, CALIFORNIA <br />' Copyright Klanfelder Inc 1996 <br />