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UNIFIED SOIL CLASSIFICATION SYSTEM <br />GROUP <br />MAJOR DIVISIONS <br />GROUP NAME <br />SYMBOL <br />CLEAN <br />GW <br />WELL -GRADED, FINE TO COARSE GRAVEL <br />COARSE- <br />GRAVEL <br />GRAVEL <br />GP <br />POORLY -GRADED GRAVEL <br />GRAINED <br />MORE THAN 50 % <br />GRAVEL <br />GM <br />OF COARSE FRACTION <br />SILTY GRAVEL <br />RETAINED ON <br />SOILS <br />NO.4 SIEVE <br />WITH FINES <br />GC <br />CLAYEY GRAVEL <br />SAND <br />CLEAN <br />SW <br />WELL -GRADED SAND, FINE TO COARSE SAND <br />SAND <br />SP <br />POORLY GRADED SAND <br />MORE THAN 50 % <br />RETAINED ON <br />MORE THAN 50 % <br />NO. 200 SIEVE <br />OF COARSE FRACTION <br />SAND <br />SM <br />SILTY SAND <br />PASSES NO.4 SIEVE <br />SC <br />WITH FINES <br />CLAYEY SAND <br />FINE - <br />SILT AND CLAY <br />ML <br />SILT <br />INORGANIC <br />GRAINED <br />LIQUID LIMIT <br />CL <br />CLAY <br />LESS THAN 50 % <br />SOILS <br />ORGANIC <br />OL <br />ORGANIC SILT, ORGANIC CLAY <br />SILT AND CLAY <br />MH <br />SILT OF HIGH PLASTICITY, ELASTIC SILT <br />INORGANIC <br />MORE THAN 50 % <br />PASSES <br />LIQUID LIMIT <br />CH <br />CLAY OF HIGH PLASTICITY, FLAT CLAY <br />NO.200 SIEVE <br />50 % OR MORE <br />ORGANIC <br />OH <br />ORGANIC CLAY, ORGANIC SILT <br />HIGHLY ORGANIC SOILS <br />PT <br />t <br />PEAT <br />° <br />NOTES: <br />e <br />t <br />1) Field classification is based on visual <br />c <br />SOIL MOISTURE MODIFIERS: <br />examination of soil in general <br />accordance with ASTM D 2488-93. <br />Dry - Absence of moisture, dusty, dry to <br />the touch <br />2) Soil classification using laboratory tests <br />° <br />is based on ASTM D 2488-93. <br />Moist - Damp, but no visible water. < <br />0 <br />3) Descriptions of soil density or <br />t <br />Wet -Visible free water or saturated, <br />consistency are based on <br />usually soil is obtained from <br />interpretation of blowcount data, <br />below water table <br />visual appearance of soils, and/or <br />test data. <br />° <br />f <br />a <br />Project Number <br />NELSON GEOTECHNICAL <br />No. <br />Date <br />Revision <br />By <br />CK u <br />910614 <br />McKinnon Residence <br />NGA <br />ASSOCIATES, INC. <br />Retaining Wall <br />GEOTECHNICAL ENGINEERS & GEOLOGISTS <br />1 <br />11/24/14 <br />Oilginal <br />DPN <br />LSB Ec <br />a <br />Figure 4 <br />Soil Classification Chart <br />17311-135th Ave. NE, A J00 <br />Snohomish <br />County (425) 337-1889 <br />� <br />Woodlnvllla, WA 98072 Wenatchee/Chelan (509) 665-7696 <br />(425) 486.1669 / Fax 481.2510-nelsongeotach.com <br />C <br />