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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 /> WITH LITTLE <br /> GRAVELS OR NO FINES — GP POORLY GRADED GRAVELS GRAVEL SAND <br /> (More than half of _ MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction <br /> is larger than 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 /> (More than half = = WELL-GRADED SANDS SAND GRAVEL <br /> of material - - SW <br /> is larger than CLEAN SANDS _= MIXTURES WITH LITTLE OR NO FINES <br /> the #200 sieve) WITH LITTLE <br /> SANDS OR NO FINES SP POORLY GRADED SANDS, SAND-GRAVEL <br /> (Mare 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 12% 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 />' CL 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 <br /> the #200 sieve) SILTS AND CLAYS INORGANIC CLAYS OF HIGH PLASTICITY <br /> CH FAT CLAYS <br />' (Liquid limit greater than 50) <br /> OH ORGANIC CLAYS&ORGANIC SILTS <br /> OF MEDIUM-TO HIGH PLASTICITY <br /> LOAMS UNDER USDA SOIL CLASSIFICATION SYSTEM <br /> SOIL OF APPROXIMATELY EQUAL SANDISILTICLAY <br /> s UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> RIK LEI NFELDER <br /> WILBUR-ELLIS COMPANY <br /> a Drafted By DWA Project No 20-443901-E01 212 INDUSTRIAL DRIVE /q— <br /> Y Date 68/00 File Number STOCKTON, CALIFORNIA <br /> Copyright Kleinfelder Inc 2000 <br />