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UNIFIED SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS USCS TYPICAL SYMBOL DESCRIPTIONS GW WELL-GRADED GRAVELS, GRAVEL-SAND CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES WITH LITTLE OR - s GRAVELS NO FINES — GP POORLY-GRADED GRAVELS, GRAVEL-SAND MIXTURES WITH LITTLE OR NO FINES MORE THAN HALF C'M SILTY GRAVELS, GRAVEL-SILT-SAND COARSE FRACTION GRAVELS MIXTURES IS LARGER THAN WITH OVER COARSE THE#4 SIEVE GRAINED 12%FINES GG` CLAYEYGRAVELS, GRAVEL-SAND-CLAY SOILS MIXTURES ALF (MORE THAN H =_ OF MATERLAL IS -_ SW WELL-GRADED SANDS, SAND-GRAVEL LARGER THAN CLEAN SANDS -_ MIXTURES WITH UTILE OR NO FINES THE#200 SIEVE) WITH LITTLE OR SANDS NO FINES S P POORLY-GRADED SANDS,SAND-GRAVEL MIXTURES WITH LITTLE OR NO FINES I MORE THAN HALF COARSE FRACTION I SM SILTY SANDS, SAND-GRAVEL-SILT MIXTURES IS SMALLER THAN SANDS WITH _ THE#4 SIEVE OVER 12%FINES i SC CLAYEYSANDS, SAND-GRAVEL-CLAY MIXTURE INORGANIC SILTS& VERY FINE SANDS, ML SILTY OR CLAYEY FINE SANDS, CLAYEY SILT WITH SLIGHT PLASTICITY SILTS AND CLAYS C L INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, GRAVELLYCLAYS, SANDY CLAyS, SILTY CLAYS LEAN CLAYS FINE LIQUID LIMIT LESS THAN 50 GRAINED I OL ORGANIC SILTS&ORGANIC SILTY CLAYS SOILS I I I OFLOW PLASTICITY (MORE TITAN HALF OF MATERIAL IS MH INORGANIC SILTS, MICACEOUS OR SMALLER THAN DIATOMACEOUS FINE SAND OR SILT THE#200 SIEVE) SILTS AND CLAYS CH INORGANIC CLAYS OF HIGH PLASTICITY FAT CIA YS LIQUID LIMIT GREATER THAN 50 ' OH ORGANIC CLAYS&ORGANIC SILTS OF MEDIUM-TO-HIGH PLASTICITY HIGHLY ORGANIC SOILS PT PEAT, HUMUS. SWAMP SOILS 1j, A'ITH HIGH ORGANIC CONTENTS SOIL CLASSIFICATION SYSTEM PLATE MKLEINFELDER TEICHERT TRAINA PROPERTY A-2 Drafted By: GSM Project No.: 20-1100-38.601 TRACY, CALIFORNIA Date: 9112/96 File Number: 20-1100-38.G01 Qvyngk X m*Aier,Ix.1996