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l�I�fiSFl�� �(�I� ��A���F��ATI�t� �VST�� <br />MAJOR DIVISIONS GROUP GROUP NAl1�E <br />SYMBOL <br />GRAVEL CLEAN GW 1NELL-GRADED GRAVEL, FINE TO COARSE GRAVEL <br />COARSE- MORE THAN 50% OF GRAVEL GP POORLY-GRADED GRAVEL <br />GRAINED COARSE FRACTION GRAVEL WITH GM S1LTY GRAVEL <br />SOILS RETAINED ON IdO. 4SIEVE FINES GC CLAYEY GRAVEL <br />SAND CLEAN SW WELL-GRADED SAND, FINE TO COARSE SAND <br />MORE THAN 50% MORE THAN 50% OF SAND SP POORLY-GRADED SATdD <br />RETAIIVED ON THE CQARSE FRACTION SAND WITH SM SILTY SAND <br />NO. 200 SIEVE PASSlNG NO. 4 SIEVE FINES SC CLAYEY SAND <br />FINE- SILTAND CLAY INORGANIC M� si�r <br />�RAINED LIQUID LIMIT CL CLAY <br />SOILS LESS THAN 50% pRGANIC QL DRGANIC S1LT, ORGANIC CLAY <br />, s�J;i� ' 5'� ��� Ui Iic�ll PU"�STI�I' �', L:�.;'\5f1C S,Li __�._v,�.___._�h <br />_� nnoRE THn.� �o�i � SILTY Ai�� C� r' ii�ifl�GAi�JIC h <br />PASSING ON THE LIQUID LIMIT CH CLAY OF HIGH PLASTICITY, FAT CLAY <br />NO. 2D0 SIEVE 50% OR MORE ORGANIC OH ORGANIC SILT, ORGANIC SILT <br />HIGHLI! �RGANIC SOILS PT PEATAND OTHER HIGHLY aRGANIC SOILS <br />NOTES: SOIL MOISTURE MODIFIERS: <br />1. FIELD CLASSIFICATION IS BASED ON VISUAL EXAMINATION DRY - ABSENCE OF MOISTURE, DUSTY, DRY TO <br />OF SOIL IN GENERAL ACCORDANCE WITH ASTM D2488-83. THE TOUCH <br />2. SOIL CLASSIFICATION USING LABORATORY TESTS 15 BASED SLIGHTLY MOIST - TRACE MQISTURE, NOT DUSTY <br />ON ASTM D2487-83. MOIST - DAMP, BUT NO VISIBLE WATER <br />3. DESCRIPTIONS OF SOIL DEIVSIIY OR CONSISTENCY AftE VERY MOIST - VERY DAMP, MOISTURE FELT TO TtiE TOUCH <br />SASED OlU INTERPRETRTION OF BLOW-COUNT DATA, VISUAL WET - VISIBLE FREE WATER OR SATURATED, <br />APPEARANCE OF 501LS, AND/OR TEST DATA. USUALLY SOII 1S OBTAINED FROM BELOW <br />WATER TABLE <br />LIU & ASSOCIAtTES, INC. UNIFIED SOIL CLASSIFICATION SYSTEM <br />Geotechnical Engineering - Engineering Geology � Earth Science <br />- ---__--_..—_____------ --- --- _ _ . <br />Pl�4TE 3 <br />