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SYMBOL DESCRIPTION MAJOR DIVISIONS <br /> GW WELL GRADED GRAVELS, <br /> GRAVEL-SAND MIXTURES CLEAN GRAVELS <br /> WITH LESS THAN <br /> POORLY GRADED GRAVELS, 5%FINES GRAVEL AND <br /> GP GRAVEL-SAND MIXTURES GRAVELLY SOILS ? <br /> MORE THAN 50% <br /> SILTY GRAVELS,GRAVEL- RETAINED ON c <br /> GM SAND-SILT MIXTURES #4 SIEVE v, N <br /> GRAVELS WITH G1 <br /> MORE THAN <br /> GC. CLAYEY GRAVELS,GRAVEL- 12%FINES rA <br /> SAND-CLAY MIXTURES r>, <br /> C7 �C <br /> SW WELL GRADED SANDS, w o <br /> GRAVELLY SANDS <br /> CLEAN SANDS tn <br /> WITH LESS THAN SANDS AND 0 z <br /> POORLY GRADED SANDS, <br /> 5%FINES <br /> SP SANDY SOILS <br /> GRAVELLY SANDS H <br /> a; <br /> O <br /> MORE THAN 50% <br /> SM SILTY SANDS, SAND- OF COARSE <br /> SILT MIXTURES SANDS WITH FRACTION PASSING <br /> MORE THAN #4 SIEVE <br /> CLAYEY SANDS, SAND- 12%FINES <br /> 'SC CLAY MIXTURES <br /> INORGANIC SILTS,ROCK FLOUR, <br /> ML OR CLAYEY SILTS WITH SLIGHT <br /> PLASTICITY > <br /> 4 <br /> INORGANIC CLAYS OF LOW TO SILTS <br /> LIQUID LIMIT c <br /> CL MEDIUM PLASTICITY,GRAVELLY AND cv <br /> CLAYS,SILTY CLAYS,LEAN CLAYS LESS THAN 50 CLAYS to z <br /> a <br /> O <br /> ORGANIC SILTS AND ORGANIC E" <br /> OL SILTY CLAYS OF LOW PLASTICITY w <br /> N <br /> INORGANIC SILTS,MICACEOUS <br /> MH OR DIATOMACEOUS SILTS, <br /> ELASTIC SILTS tn <br /> c <br /> w z <br /> INORGANIC CLAYS OF HIGH LIQUID LIMIT SILTS <br /> CH PLASTICITY,FAT CLAYS GREATER THAN 50 AND <br /> CLAYS u� <br /> OH ORGANIC CLAYS AND ORGANIC <br /> SILTS OF MED TO HIGH PLASTICITY <br /> PT PEAT,HUMUS,SWAMP SOILS HIGHLY ORGANIC SOILS <br /> WITH HIGH ORGANIC CONTENT <br /> PLATE <br /> R A M C O N UNIFIED SOIL CLASSIFICATION SYSTEM 9 <br /> Engineering&Environmental Contracting <br />