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UNIFIED SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS GROUP GROUP NAME SYMBOL CLEAN GW WELL-GRADED,FINE TO COARSE GRAVEL COARSE - GRAVEL GRAVEL GP POORLY-GRADED GRAVEL GRAINED MORE THAN 50% GRAVEL OF COARSE FRACTION GM SILTY GRAVEL RETAINED ON SOILS NO.4 SIEVE WITH FINES GC CLAYEY GRAVEL SAND CLEAN SW WELL-GRADED SAND,FINE TO COARSE SAND SAND SP POORLY GRADED SAND MORE THAN 50% RETAINED ON MORE THAN 50% NO.200 SIEVE OF COARSE FRACTION SAND SM SILTY SAND PASSES NO.4 SIEVE WITH FINES SC CLAYEY SAND FINE - SILT AND CLAY ML SILT INORGANIC GRAINED LIQUID LIMIT CL CLAY LESS THAN 50% SOILS ORGANIC OL ORGANIC SILT,ORGANIC CLAY SILT AND CLAY MH SILT OF HIGH PLASTICITY,ELASTIC SILT MORE THAN 50% INORGANIC PASSES LIQUID LIMIT CH CLAY OF HIGH PLASTICITY,FLAT CLAY NO.200 SIEVE 50%OR MORE ORGANIC OH ORGANIC CLAY,ORGANIC SILT HIGHLY ORGANIC SOILS PT PEAT to NOTES: m m 1) Field classification is based on visual SOIL MOISTURE MODIFIERS: o examination of soil in general accordance with ASTM D 2488-93. Dry-Absence of moisture,dusty,dry to a the touch 0 0 2) Soil classification using laboratory tests = is based on ASTM D 2488-93. Moist-Damp,but no visible water. . 3) Descriptions of soil density or Wet-Visible free water or saturated, consistency are based on usually soil is obtained from interpretation of blowcount data, below water tablecri visual appearance of soils,and/or °' N test data. LL Project Number NELSON GEOTECHNICAL No. Date Revision By CK 959616 Watson Residence Addition N A ASSOCIATES, INC. 1 6/21/16 Original DPN ABR Q Soil Classification Chart GEOTECHNICAL ENGINEERS & GEOLOGISTS 0 z co FI t.l re 4 17311-1351h Ave.NE.A-500 Snohomish County(425)337-1669 y Woodinville,WA 98072 wenatchee/Chelan(509)665-7696 N (425)486-1669/Fax 481-2510 www.nelsongeotech.crom Z