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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 =_ GRAVELS NO FINES - GP POORLY-GRADED GRAVELS, GRAVEL-SAND _= MIXTURES WITH LITTLE OR NO FINES MORE THAN HALF G M COARSE FRACTION SILTY GRAVELS, GRAVEL-SILT-SAND IS LARGER THAN GRAVELS - MIXTURES COARSE THE#4 SIEVE WITH OVER GRAINED I2%a FINES - GC CLAYEY GRAVELS, GRAVEL-SAND-CLAY SOILS - - MIXTURES (MORE THAN HALF OF MATERIAL IS -= SW WELL-GRADED SANDS, SAND-GRAVEL LARGER THAN CLEAN SANDS _-= MIXTURES WITH LITTLE 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 MORE THAN HALF COARSE FRACTION SM SILTY SANDS, SAND-GRAVEL-SILT MIXTURES IS SMALLER THAN SANDS WITH THE#4 SIEVE OVER 12%FINES SC CLAYEY SANDS, SAND-GRAVEL-CLAY MIXTURE M L INORGANIC SILTS& VERY FINE SANDS, SILTY OR CLAYEY FINE SANDS CLAYEY SILTS WITH SLIGHT PLASTICITY SILTS AND CLAYS SO// CL INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, GRAVELLY CLAYS, SANDY CLAYS SILTY CLAYS LEAN CIA YS FINE LIQUID LIMIT LESS THAN 50 I GRAINED �' OL ORGANIC SILTS&ORGANIC SILTY CLAYS SOILS I I I OFLOW PLASTICITY (MORE THAN HALF OF MATERIAL IS M H INORGANIC SILTS, MICACEOUS OR 1 SMALLER THAN DIATOMACEOUS FINE SAND OR SILT THE#200 SIEVE) SILTS AND CLAYS CH INORGANIC CL4 YS OF HIGH PLASTICITY FAT CLAYS LIQUID LIMIT GREATER THAN 50 OH ORGANIC CLAYS& ORGANIC SILTS — OF MEDIUM-TO-HIGH PLASTICITY HIGHLY ORGANIC SOILS r, 0' PT PEAT, HUMUS, SWAMP SOILS WITH HIGH ORGANIC CONTENTS I SOIL CLASSIFICATION SYSTEM PLATE k" K L E I N F E L D E R SEAWALL EVALUATION WEBER POINT A-3 Drafted By 7F,'l(e ect No 20-1129-30 G01 CITY OF STOCKTON Date Number Cap)nglu Kleinfelder Inc 1996