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MAJOR DIVISIONS LETTER TYPICAL DESCRIPTION <br /> SYMBOL <br /> Clean GW Well-graded gravels,gravel-sand mixtures, little or no fines. <br /> • ` GRAVELS Gravels(less <br /> than 5% <br /> J More than 50% fines) GP Poorly-graded gravels,gravel-sand mixtures, little or no fines. <br /> O m N of coarse fraction <br /> Cl) To .N is larger than No. GM Silty gravels,gravel-sand-silt mixtures,non-plastic fines. <br /> w arc 4 sieve Gravels with <br /> Z fines GC Clayey gravels,gravel-sand-clay mixtures,plastic fines. <br /> g * N <br /> o Clean Sands SW Well-graded sands,sands with gravel, little or no fines. <br /> N m Z SANDS (less than <br /> IX Y m More than 50% 5%fines) SP Poorly-graded sands,sands with gravel,little or no files, <br /> o <br /> ez - of coarse fraction <br /> v 2 is smaller than SM Silty sands,sand-silt mixtures,non-plastic fines. <br /> No. 4 sieve Sands with <br /> fines SC Clayey sands,sand-clay mixtures,plastic fines. <br /> ai ML Inorganic silts, rock flour,clayey silts with slight plasticity. <br /> 15 <br /> 0E .y SILTS AND CLAYS <br /> p c } Liquid Limit is less than 50% CL Inorganic clays of low to medium plasticity.(Lean clay) <br /> a R N OL Organic silts and organic clays of low plasticity. <br /> ILI Z Eo <br /> N MH Inorganic silts,elastic. <br /> a <br /> t9 , Z SILTS AND CLAYS <br /> uj Z Liquid Limit is greater than 50%CO c CH Inorganic clays of high plasticity.(Fat clay) <br /> . o OH Organic clays of high plasticity. <br /> HIGHLY ORGANIC SOILS PT Peat. <br /> DEFINITION OF TERMS AND SYMBOLS <br /> N <br /> Standard Penetration T 2"OUTSIDE DIAMETER SPILT SPOON SAMPLER <br /> to Density Resistance in Blows/Foot <br /> p Very Loose 0 4 IF 2. 4"INSIDE DIAMETER RING SAMPLER OR <br /> o• Loose 4-10 SHELBY TUBE SAMPLER <br /> = Medium Dense 10-30 y WATER LEVEL(Date) <br /> ✓ Dense 30-50 <br /> Very Dense >50 Tr TORVANE READINGS,tsf <br /> Standard Penetration Pp PENETROMETER READING,tsf <br /> Consistancy Resistance in Blows/Foot <br /> DD DRY DENSITY, pounds per cubic foot <br /> u) Very <br /> LIJ Soft Soft 2--4 LL LIQUID LIMIT, percent <br /> O Medium Stiff 4-8 <br /> tJ Stiff 8-16 PI PLASTIC INDEX <br /> Very Stiff 16-32 <br /> Hard >32 N STANDARD PENETRATION,blows per foot <br /> ''. Terra UNIFIED SOIL CLASSIFICATION SYSTEM <br /> ; PROPOSED STORAGE BUILDING <br /> v*\kl"��•� i EVERETT, WASHINGTON <br /> A�St3Cla �S�� <br /> • • •�- Consultants in Geotechnical <br /> Qin Pro No.T-6116-2 Date OCT 2015 I Figure A-1 <br /> Environ Earth Sciences 1• 9 <br />