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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS GROUP GROUP NAME <br /> I SYMBOL <br /> f CLEAN GW WELL-GRADED,FINE TO COARSE GRAVEL <br /> GRAVEL GRAVEL <br /> GRAVEL GP POORLY-GRADED GRAVEL <br /> GRAINED MORE THAN 50% GRAVEL <br /> OF COARSE FRACTION GM SILTY GRAVEL <br /> RETAINED ON — <br /> SOILS NO.4 SIEVE WITH FINES <br /> GC CLAYEY GRAVEL <br /> SAND CLEAN SW WELL-GRADED SAND,FINE TO COARSE SAND <br /> SAND <br /> SP POORLY GRADED SAND <br /> MORE THAN 50% <br /> RETAINED ON MORE THAN 50% <br /> NO. SIEVE OF COARSE FRACTION SAND SM SILTY SAND <br /> PASSES NO.4 SIEVE <br /> WITH FINES SC CLAYEY SAND <br /> FINE- SILT AND CLAY ML SILT <br /> INORGANIC <br /> GRAINED LIQUID LIMIT CL CLAY <br /> LESS THAN 50% <br /> SOILS ORGANIC OL ORGANIC SILT,ORGANIC CLA <br /> SILT AND CLAY MH SILT OF HIGH PLASTICITY,ELASTIC SILT <br /> MORE THAN 50% INORGANIC <br /> PASSES LIQUID LIMIT CH CLAY OF HIGH PLASTICITY,FLAT CLAY <br /> NO.200 SIEVE 50%OR MORE <br /> ORGANIC OH ORGANIC CLAY,ORGANIC SILT <br /> HIGHLY ORGANIC SOILS PT PEAT <br /> NOTES: <br /> 1) Field classification is based on visual SOIL MOISTURE MODIFIERS: <br /> examination of soil in general <br /> accordance with ASTM D 2488-93. Dry-Absence of moisture,dusty,dry to <br /> the touch I <br /> 2) Soil classification using labratory tests <br /> is based on ASTM D 2488.93. Moist-Damp,but no visible water. <br /> Wet-Visible free water or saturated, P, <br /> 3) Descriptions of soil density or usuallysoil is obtained from y <br /> consistency are based on below water table 8 <br /> interpretation of blowcount data, <br /> visual appearance of soils,and/or EH!BIT #..ali. <br /> test data. PAGE 7LOFI I t g <br /> 'PROJECT NUMBER NELSON GEOTECHNICAL No. Date Revision By CK 1 <br /> 366502 Strickland/Nielsen NGA ASSOCIATES, INC. I 3128/03 Original ADJ DLM a <br /> 3 <br /> Sod Classification GEOTECHNICAL ENGINEERS&GEOLOGISTS <br /> Figure 173t1-1351N Ave.NE.A-500 han 6N County(425)37]-1869 O <br /> WooafnAle.WA 98072 Walwtefix/C11Yan(509)784-2]58 d <br /> (425)486-1669/Fag 481-2510 w.neltMgaefeahoom (� <br /> Z <br />