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r— Unified Soil Classification System <br /> MAJOR DIVISIONS GROUP GROUP NAME <br /> SYMBOL <br /> GRAVEL CLEAN GRAVEL GW VJELL-GRADED GRAVEI,FINE TO COARSE GRAVEL <br /> COARSE - <br /> GRAINED MOFtE THAN 50°h OF GP POORLY-GRADED GRAVEL <br /> COARSE FRACTION <br /> SOILS RETAINEDONN0.4 GRAVEL <br /> SIEVE WITHfINES �M SILTYGRAVEL <br /> GC CLAYEY GRAVEL <br /> MORE THAN 50% <br /> RETAINED ON SAND CLEAN SAND SW WELL-GRADED SAND,FINE TO COARSE SAND <br /> number 200 SIEVE <br /> SP POORLY-GRADED SAND <br /> MORE THAN 50°k OF <br /> � COARSE FRP.CTION SAND <br /> PASSESNG.451EVE VvITHFINES SM SICiYSAND <br /> SC CLAYEYSAND <br /> SILTANDCLAY INORGANIC ML SILT <br /> FINE- <br /> GRAINED LIOUID LIMIT CL c�nv <br /> IESS THAN 50°/ <br /> SOILS ORGANIC <br /> OL ORGANIC SILT,ORGANIC CLAY <br /> MORF THAN 50°k SILTAND f;LAY �NORGANIC <br /> PASSES NO.200 SIEV MH SILT OF HIGH PLASTICITY,ELASTIC SILT <br /> LI�UID LIMIT CH CLAY OF HIGH PLASiICIN,FAT CLAY <br /> 50°/OR MnRE <br /> ORGANIC QH ORGANIC CIAY,ORGANIC SILT <br /> HIGFiLY ORGANIC SOILS pT pEnr <br /> NOTES: <br /> SOIL MOISTURE MODIFIERS <br /> 1) Field classificalion is based on Dry-Absence of moisture, dusly, dry <br /> visual examination of soil in general to the touch <br /> accordance with ASTM D 2488-83. <br /> 2) Soil classifir.ation using laboratory Moist-Damp, but no visible water <br /> tests is based on ASTM D 2487-83. Wet-Visible free waler or salurated, <br /> 3) Dascriptions ot soil density or usually soii is obtained irom <br /> consistency are based on below waler table <br /> interpretation of blowcount data, <br /> visual aopearance of soils, andlor <br /> test data. 3 <br /> �� <br /> Cornerstone Phone:(425)844-1977 Unified Soil Classification System <br /> �� Geotechnical� IC�C. Fax (425�844-1987 <br /> r 17625-130th Ave NE,C•102 •Woadinville,WA' 98072 Figure 3 <br />