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./ <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> LISCS TYPICAL <br /> MAJOR DIVISIONS SYMBOL DESCRIPTIONS <br /> ' GW WELL-GRADED GRAVELS,GRAVEL-SAND <br /> CLEAN GRAVELS MIXTURES WITH LITTLE OR NO FINES <br /> WITH LITTLE40 <br /> GRAVELS OR NO FINES <br /> ` POORLY-GRADED GRAVELS,GRAVEL-SAND <br /> (More than half of o GP MIXTURES WITH LITTLE OR NO FINES <br /> coarse fraction O <br /> is larger than <br /> the#4 sieve) ° GM SILTY GRAVELS,GRAVEL-SILT-SAND <br /> GRAVELS MIXTURES <br /> COARSE WITH OVER <br /> GRAINED 12% FINESGC CLAYEY GRAVELS,GRAVEL-SAND-CLAY <br /> SOILS MIXTURES <br /> (More than half SW WELL-GRADED SANDS,SAND-GRAVEL <br /> of material CLEAN SANDS MIXTURES WITH LITTLE OR NO FINES <br /> is larger than SANDS WITH LITTLE <br /> the#200 sieve) (More than half of OR NO FINES <br /> coarse fraction SP POORLY-GRADED SANDS, NO FINES is smaller than MIXTURES WITH LITTLE OR NO FINES <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 /> ML SILTY OR CLAYEY FINE SANDS, <br /> CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> SILTS AND CLAYSINORGANIC CLAYS OF LOW TO MEDIUM <br /> CL <br /> PLASTICITY,GRAVELLY CLAYS,SANDY CLAYS, <br /> (Liquid limit less than 50) SILTY CLAYS,LEAN CLAYS <br /> FINE <br /> GRAINED — <br /> SOILS — ORGANIC SILTS&ORGANIC SILTY CLAYS <br /> OL OF LOW PLASTICITY <br /> L <br /> (More than half MH DIATOMACEOUS <br /> SILTS,MICACEOUS OR <br /> of material DIATOMACEOUS FINE SAND OR SILT <br /> Lis smaller than <br /> the#200 sieve) SILTS AND CLAYS <br /> CH FAT <br /> CLAYS OF HIGH PLASTICITY, <br /> (Liquid limit greater than 50) FAT CLAYS <br /> L OH ORGANIC CLAYS&ORGANIC SILTS <br /> OF MEDIUM-TO-HIGH PLASTICITY <br /> HIGHLY ORGANIC SOILS PT PEAT,HUMUS,SWAMP SOILS WITH HIGH <br /> ORGANIC CONTENT <br /> a <br /> �. <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> PETROLEUM PIPELINE SPILL <br /> KLEIN FELDER 23577 MOUNTAINHOUSE PARKWAY <br /> N /� <br /> TRACY, CALIFORNIA A-1 <br /> Drafted BY: GDG Project No.: 44843.703 <br /> r Date: 7/29/2004 File Number: ST04G159 <br /> j �°°v,ym✓,ir,,,i°xiauk ww <br />