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UNIFIED SOIL CLASSIFICATION SYSTEM GROUP MAJOR DIVISIONS SYMBOL GROUP NAME 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 N0.200 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 HIGHLY ORGANIC SOILS PT PEAT 3 NOTES: T. 1) Field classification is based on visual SOIL MOISTURE MODIFIERS: o examination of soil in general a accordance with ASTM D 2488-93. Dry-Absence of moisture,dusty,dry to ,, the touch w' m 2) Soil classification using laboratory tests Moist-Dam but no visible water. W is based on;ASTM D 2488-93. P. 6 Wet-Visible free water or saturated, 3) Descriptions of soil density or 3 consistency are based on usually soil is obtained from to interpretation of blowcount data, below water table E visual appearance of soils,and/or test data. m Project Number NELSON GEOTECHNICAL No. Date Revision By CK t 1033518 Larsen Garage N G A ASSOCIATES, INC. ,, Classification 1 4111/18 Original DPN LSB .7 Soil Classification Chart GEOTECHNICAL ENGINEERS &GEOLOGISTS z wooamvale OUk. Ease Wo elen eOleos a° Figure 4 17311435th Ave.NE.A-50D,. 5528 Industry lane.02 Woomm8e,WA 98072 East Wenekaee,WA 98802 0 (425)488.1689/Fax 401-2510 vAwmelsongeoifth.omn (509)885.76961 Fax 885.7892 z