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UNIFIED SOIL CLASSIFICATION SYSTEM <br />MAJOR DIVISIONS GROUP GROUP NAME <br />COARSE-LRETAINED <br />GRAINEDRSE <br />SOIL) <br />GRAVEL <br />E THAN OF <br />FRACTION <br />ON NO 4 SIEVE <br />CLEAN <br />GRAVEL <br />GW <br />WELL -GRADED GRAVEL FINE TC COARSE GRAVEL <br />GP <br />POORLY -GRADED GRAVEL <br />GRAVEL WITH <br />FINES <br />GM <br />SILT GRAVEL <br />GC <br />CLAYEY GRAVE: <br />MORE THAN 50% <br />RETAINED ON THE <br />NO 2W SIEVE <br />SAND <br />MORE THAN 50%OF <br />COARSE FRACTION <br />PASSING NO 4SIEVE <br />CLEAN <br />SAND <br />SW <br />WELL GRADED SAND. FINE TO COARSE SAND <br />SP <br />POORLY -GRADED SAND <br />SAND WITH <br />FINES <br />SM <br />SILTY SAND <br />SC <br />CLAYEY SAND <br />FINE- <br />GRAINED <br />SOILS <br />SILT AND CLAY <br />I-IOUIDLIMIT <br />LESSTHAN5D% <br />r INORGANIC <br />ML <br />SILT <br />CL <br />CLAY <br />ORGANIC <br />OL <br />ORGANIC SILT. ORGANIC CLAY <br />MORE THAN 50% <br />PASSING ON THE <br />NO. 200 SIEVE <br />SILTY AND CLAY <br />LIOUID LIMIT <br />50%OR MORE <br />INORGANIC <br />MH <br />SILT OF HIGH PLASTICITY, ELASTIC SILT <br />CH <br />CLAY OF HIGH PLASTICITY, FAT CLAY <br />ORGANIC <br />OH <br />ORGANIC SILT. ORGANIC SILT <br />HIGHLY ORGANIC SOILS <br />PT <br />PEAT AND OTHER HIGHLY ORGANIC SOILS <br />NOTES: SOIL MOISTURE MODIFIERS <br />I FIELO CLASSIFICATION IS RASED ON VISUAL E'AAMINA71ION DRY. ABSENCE OF MOISTURE. DUSTY, DRY TO <br />OF SOIL IN GENERAL ACCORDANCE WITH ASTM D:48883 THE TOUCH <br />:. SOIL CLASSIFICATION USING LABORATORY TESTS IS BASED <br />SLIGHTLY MOIST - TRACE MOISTURE, NOT DUSTY <br />ON ASTM D2407.63 MOIST - DAMP, BUT NO VISIBLE WATER <br />J DESCRIPTIONS OF SOIL DENSITY OR CONSISTENCY ARE <br />VERY MOIST -VERY DAMP, MOISTURE FELT TO THE TOUCH <br />BASED ON INTERPRETATION OF BLOW -COUNT DATA, VISUAL WET • VISIBLE FREE WATER OR SATURATED, <br />APPEARANCE OF SOILS, ANDtOR TEST DATA USUALLY SOIL 15 OBTAINED FROM BELOW <br />WATER TABLE <br />LIU & ASSOCIATES, INC. UNIFIED SOIL CLASSIFICATION SYSTEM <br />Gedmhn'.Cal Enoirwng EngMeetlnj GeNogy ' EaM SClem <br />- - PLATE 3 <br />41 aap$ <br />