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UNIFIED SOIL CI_ASSIFICATION SYSTEM <br />MAJOR DIVISIONS GROUP GROUP NAME <br />SYMBOL <br />GRAVEL CLEAN GW 4VELL-Gf2A�ED GRAVEL, PINE 10 COARSE Gf2AV[L <br />COARSE- MORE TI1AN 50% OF GRAVEL GP POORLY-GHADED GRAV�L <br />GRAINED COARSEFRACTION GRAVELWITH GM SILTYGRAVEL <br />SOILS RETAWEOONNO.ASIEV[ FINES GC CLAYFYGRAVfI. <br />SAND CLEAN SW WELL-GRAOED SAND, FINE TO COARS[ S�ND <br />MORE THAN 50% MOR[ THAN 50% OF SAND SP POORLY-Gf2ADED SAND <br />RETAIN[D OY THE COARS[ FRACTION SAND WITH SM SILN SAND <br />NO. 200 SIEV[ P�SSING NO. 4 SIEVE <br />FINES SC c�nver snNo <br />FINE- SILT AND CLAY INORGANIC M� �ILT <br />GRAINED LIqUID LIMIT C� ��Y <br />SOILS LESS THAN 50% ORGANIC OL ORGANIC SILT, ORGANIC CLAY <br />MORE THAN 50% SILTY AND CL`�Y INORGANIC MH SILT OF HIGH PLASTICITY, ELASTIC SILT <br />PASSING ON THE LIQUID LIMIT CH CLAY OF HIGH PLASTICIT� , FAT CLAY <br />NO. 200 SIEVE 50 % OR MORE <br />ORGANIC OH ORGANIC SILT, ORGANIC SILT <br />HIGHLY ORGANIC SOILS PT PEAT ANU OTHER HIGHLY ORGANIC SOILS <br />NOTES: SOIL MUISTURE MODIFIERS: <br />1. FI[LD CLASSIFICATION IS 6.1SEn ON VISUAL [%AMINATION DRY - ABSENCE OF MOISTURE, DUSTY, CRY TO <br />OF SOIL IN GENERAL ACCORDANCE WITH ASTM D24B8-83. THE TOUCH <br />2. SOIL CLASSIFICATION USING LABORATORY TESTS IS BASED SLIGHTLY MOIST - TRACG MOISTURE, NGT DUSTY <br />ON ASTM D2487-83 <br />MOIST - DAMP, BUT NO VISIBLE WATEF2 <br />3. DESCRIPTIONS OF SliiL DENSITY OR CONSISTENCI' ARE VERY MOIST - VERY DAMP, MOISTUP.E FELT TO THE TOUCH <br />BASED ON INTERPRETATION OF BLOW-COUNT DATA, VISUAI yyET - VISIBLE FREE WATE'rt OR SIITURl�TED, <br />APPEARANCE OF SOILS, AND/OR TEST DATA. <br />USUALLY SOIL IS OBTAINED FROM BELOW <br />WATER TA�L[ <br />LIU & ASSOCIATCS, TNC. UNIFIED SOIL CIASSIFICATION SYSTEM <br />Geotechnical En9ineering � Engineerin� Geology � Earth Science <br />PLATE 3 <br />