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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 I MIXTURES WITH LITTLE OR NO FINES <br /> WITH LITTLE <br /> GRAVELS OR NO FINES <br /> (More than half of o� G P POORLY-GRADED GRAVELS, SAND <br /> MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction O <br /> is larger than <br /> the#4 sieve) o GM <br /> SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINES GIC MIXTURES GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS MIXTURES <br /> (More than halfS.W WELL-GRADED SANDS,SAND-GRAVEL <br /> of material CLEAN SANDS of WITH LITTLE OR NO FINES <br /> is larger than SANDS WITH LITTLE <br /> the#200 sieve) <br /> (More than half of OR NO FINES SpPOORLY-GRADEDSANDS,SAND-GRAVEL <br /> coarse fraction MIXTURES WITH LITRE OR NO FINES <br /> is smaller than <br /> the#4 sieve) <br /> SM SILTY SANDS,SAND-GRAVEL-SILT MIXTURES <br /> SANDS WITH <br /> OVER 120/, 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 /> SILTS AND CLAYS CL INORGANIC CLAYS OF LOW TO MEDIUM <br /> PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, <br /> (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS <br /> FINE <br /> GRAINED — <br /> SOILS — ORGANIC SILTS 8 ORGANIC SILTY CLAYS <br /> OL OF LOW PLASTICITY <br /> (More than half M <br /> HINORGANIC SILTS,MICACEOUS OR <br /> of material DIATOMACEOUS FINE SAND OR SILT <br /> is smaller than <br /> the#200 sieve) SILTS AND CLAYS <br /> INORGANIC CLAYS OF HIGH PUISTICITY, <br /> (Liquid limit greater than 50) FAT CLAYS <br /> ORGANIC CLAYS&ORGANIC SILTS <br /> OF MEDIUM-TO-HIGH PLASTICITY <br /> LOAMS UNDER USDA SOIL CLASSIFICATION SYSTEM, <br /> SOIL OF APPROXIMATELY EQUAL SAND/SILT/CLAY <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> h9K L E IN F E L D E R FED EX FREIGHT WEST <br /> y 4520 S. HIGHWAY 99 E. FRONTAGE 2 <br /> 0. Drafted By. GDG Project No.. 18492.601 STOCKTON, CALIFORNIA <br /> x Date: 7/17/2002 File Number: ST02GO50 <br /> Oo"',rcie,nlcMe, la 2000 <br />