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c. 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, FAT CLAY NO.200 SIEVE 50%OR MORE ORGANIC OH ORGANIC CLAY,ORGANIC SILT p, 3 o 1n HIGHLY ORGANIC SOILS PT PEAT C NOTES: z 1) Field classification is based on visual SOIL MOISTURE MODIFIERS: examination of soil in general 3 accordance with ASTM D 2488 93. Dry-Absence of moisture,dusty,dry to the touch 5. 2) Soil classification using laboratory tests o is based on ASTM D 2488-93. Moist-Damp,but no visible water. l3 3) Descriptions of soil density or Wet Visible free water or saturated, a consistency are based on usually soil is obtained from interpretation of blowcount data, below water table o visual appearance of soils,and/or test data. 0 Project Number NELSON GEOTECHNICAL No. Date Revision By CK ig Aikins Residence ASSOCIATES, INC. 1035918 Development Infiltration NGA 1 5/4/18 Original DPN LSB a GEOTECHNICAL ENGINEERS & GEOLOGISTS 0 z Figure 3 Soil Classification Chart Woodinville Office East Wenatc°°e OHlce W 17311-135th Ave.NE,A-500 5526 Industry Lane,#2 Woodinville,WA 98072 East Wenatchee,WA 98802 nJ (425)486-1669/Fax:481-2510 www.nelsongeotech.com (509)665-7696/Fax,665-7692