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UNIFIED SOIL CLASSIFICATION SYSTEM <br />MAJOR DIVISIONS GROUP GROUP NAME <br />SYMBOL <br />COARSE- <br />GRAINED <br />SOILS <br />MORE THAN 50 % <br />RETAINED ON <br />NO. 200 SIEVE <br />FINE - <br />GRAINED <br />SOILS <br />MORE THAN 50 % <br />PASSES <br />NO. 200 SIEVE <br />GRAVEL <br />MORE THAN 50 % <br />OF COARSE FRACTION <br />RETAINED ON <br />NO. 4 SIEVE <br />MORE THAN 50 °/a <br />OF COARSE FRACTION <br />PASSES NO. 4 SIEVE <br />SILT AND CLAY <br />LIQUID LIMIT <br />LESS THAN 50 % <br />SILT AND CLAY <br />LIQUID LIMIT <br />50 % OR MORE <br />CLEAN <br />GRAVEL <br />GRAVEL <br />WITH FINES <br />CLEAN <br />SAN D <br />SAN D <br />WITH FINES <br />HIGHLY ORGANIC SOILS <br />NOTES: <br />1) Field classification is based on visual <br />examination of soii in general <br />accordance with ASTM D 2488-93. <br />2) Soil classification using laboratory tests <br />is based on ASTM D 2488-93. <br />3) Descriptions of soil density or <br />consistency are based on <br />interpretation of blowcount data, <br />visual appearance of soils, and/or <br />test data. <br />ject Number <br />924115 Gustafson Residence <br />Retaining Walls <br />Figure 4 Soil Classification Chart <br />INORGANIC <br />ORGANIC <br />INORGANIC <br />ORGANIC <br />GW <br />GP <br />GM <br />GC <br />SW <br />SP <br />SM <br />SC <br />ML <br />CL <br />OL <br />MH <br />CH <br />OH <br />PT <br />WELL-GRADED, FINE TO COARSE GRAVEL <br />POORLY-GRADED GRAVEL <br />SILTY GRAVEL <br />CLAYEY GRAVEL <br />WELL-GRADED SAND, FINE TO COARSE SAND <br />POORLY GRADED SAND <br />SILTY SAND <br />CLAYEY SAND <br />SILT <br />CLAY <br />ORGANIC SILT, ORGANIC CLAY <br />SILT OF HIGH PLASTICITY, ELASTIC SILT <br />CLAY OF HIGH PLASTICITY, FLAT CLAY <br />ORGANIC CLAY, ORGANIC SILT <br />PEAT <br />SOIL MOISTURE MODIFIERS: <br />Dry - Absence of moisture, dusty, dry to <br />the touch <br />Moist - Damp, but no visible water. <br />Wet - Visible free water or saturated, <br />usually soil is obtained from <br />below water table <br />NELSON GEOTECHNICAL No. Date Revision By CK <br />NGA ASSOCIATES� �NC. � 5/22/15 Origlnal LSB KMS <br />GEOTECHNICAL ENGINEERS & GEOLOGISTS <br />11311-135�h Ave. NE M500 Snohomis� County (425) 337-1669 <br />Wootllnvllle. WA 9807� Wenalc�eelChelan (509) ]84-7]Sfi <br />(425) 48fi-16691 Fax 481-2510 www.nelsongeolech.com <br />