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SOIL CLASSIFICATION CHART <br /> MAJOR DIVISIONS SYMBOLS TYPICAL <br /> GRAPH LETTER DESCRIPTIONS <br /> CLEAN lLb b GW SAND MIXTURES,RATTLE OR NOEL <br /> GRAVEL GRAVELS S �� FINES <br /> AND <br /> GRAVELLY POORLY-GRADED GRAVELS, <br /> SOILS (LITTLE OR NO FINES) o OOo D GP GRAVEL-SAND MIXTURES,LITTLE <br /> O C) 00 0 OR NO FINES <br /> COARSE <br /> GRAINED GRAVELS WITH ° SILTY GRAVELS,GRAVEL-SAND- <br /> SOILS MORE THAN 50% FINES o 0 GM SILT MIXTURES <br /> OF COARSE o <br /> FRACTION <br /> RETAINED ON NO. <br /> 4 SIEVE (APPRECIABLE CLAYEY GRAVELS,GRAVEL-SAND- <br /> AMOUNT OF FINES) GC CLAY MIXTURES <br /> MORE THAN 50% <br /> SAND CLEAN SANDS SW R GRAVELLY <br /> SANDS, LITTLE OR NO FINES <br /> OF MATERIAL IS AND <br /> LARGER THAN SANDY <br /> NO.200 SIEVE SOILS POORLY-GRADED SANDS, <br /> SIZE (LITTLE OR NO FINES) SP GRAVELLY SAND,LITTLE OR NO <br /> FINES <br /> SANDS WITH SILTY SANDS,SAND-SILT <br /> MORE THAN 50% FINES SM MIXTURES <br /> OF COARSE <br /> FRACTION <br /> PASSING ON NO. <br /> 4 SIEVE (APPRECIABLE c�+ CLAYEY SANDS,SAND-CLAY <br /> AMOUNT OF FINES) S.+ MIXTURES <br /> INORGANIC SILTS AND VERY FINE <br /> ML SANDS, ROCK FLOUR,SILTY OR <br /> CLAYEY FINE SANDS OR CLAYEY <br /> SILTS WITH SLIGHT PLASTICITY <br /> SILTS INORGANIC CLAYS OF LOW TO <br /> FINE AND LIQUID LIMIT �+ MEDIUM PLASTICITY,GRAVELLY <br /> GRAINED CLAYS LESS THAN 50 CL CLAYS,SANDY CLAYS,SILTY <br /> SOILS CLAYS, LEAN CLAYS <br /> OL ORGANIC SILTS AND ORGANIC <br /> - - - SILTY CLAYS OF LOW PLASTICITY <br /> MORE THAN 50% INORGANIC SILTS,MICACEOUS OR <br /> OF MATERIAL IS <br /> SMALLER THANN MH DIATOMACEOUS FINE SAND OR NO.200 SIEVE SILTY SOILS <br /> SIZE SILTS <br /> LIQUID LIMIT �+ INORGANIC CLAYS OF HIGH <br /> AND <br /> CLAYS GREATER THAN 50 CH PLASTICITY <br /> OH I ORGANIC CLAYS OF MEDIUM TO <br /> HIGH PLASTICITY,ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS L ' 0_" PT PEAT,HUMUS,SWAMP SOILS WITH <br /> „ HIGH ORGANIC CONTENTS <br /> NOTE: DUAL SYMBOLS ARE USED TO INDICATE BORDERLINE SOIL CLASSIFICATIONS <br /> Page 3 of 3 <br />