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1 <br /> � SOIL CLASSIFICATION SYSTEM <br /> � GROUP <br /> MAJOR DIVISIONS SYMBOL GROUP NAME <br /> ( GRAVEL CLEAN GW WELL•GMDED GMVEI,FlNE TO COAqSE 6MVEL <br /> COARSE GRAVEL <br /> GRAINED GP POOHLY-GMDED GMVEL <br /> I SOILS More Than 50% <br /> of Coerae Fraction GRAVEL GM SILTY GMVE� <br /> Rntained WITH FINES <br /> I on No.4 Sieve GC MrEY GMVEL <br /> More Then 60% <br /> Retafned o� SAND CLEAN SAND SW WELL-GMDED SAND,FINE TO COANSE SAND <br /> � No. 200 Sieve <br /> $p POOHLY-GMDED SAND <br /> More Than 50% <br /> !!! of Coarse Froction SAND SM SILTY SAND <br /> � Passes WITH FINES <br /> No.4 Sieve SC CLAVEY SAND <br /> � FINE SILT AND CLAY ML SILT <br /> GRAINED INORGANIC <br /> SOILS CL �Y <br /> I Liquid Limii <br /> L855 Then 50 ORGANIC OL OHGANIC SILT,ORGANIC CLAV <br /> More Than 60% SILT AND CLAY MH SILT OF HIG!I PLASi1qTY, ELASTIC SILT <br /> � Pasaes INORGANIC <br /> � No.200 Sieva CH CLAV OF HIGH PLASTIpTY, FAT CLAY <br /> Liquid Limit <br /> I 50 or More ORGANIC OH OflGANIC CLAV,ONGANIC SILT <br /> I HIGHLV ORGANIC SOILS PT �T <br /> (-� NOTES: SOIL MOISTURE MODIFIERS: <br /> I 1. Field classification is based on visual examinntion of soil Dry- Absence ot mofsture,dusry, dry to the touch <br /> in general accordance with ASTM D2488-90. <br /> Moist- Damp,but no visible water <br /> 2. Soil classifieetion using laboratory tests is based on <br /> � ASTM D2487-90. Wet- Vlsible free weter or saturated, usually soil is <br /> obteined from below water ta61e <br /> 3. Descriptions ot soil density or consistency are based an <br /> interpretation ot blow count data,visual appearance af <br /> � soils, andlor test date. <br /> � a <br /> r <br /> 0 <br /> � � SOIL CLASSIFICATION SYSTEM <br /> � Geo��Engineers FIGURE A-1 <br /> � U <br />