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I <br /> MAJOR DIVISIONS LETTER TYPICAL DESCRIPTION <br /> SYMBOL I <br /> Clean GW Well-graded gravels,gravel-sand mixtures, little or no fines. <br /> GRAVELS Gravels (less <br /> — <br /> than 5% <br /> U <br /> J rn More than 50% fines) GP Poorly graded gravels, gravel sand mixtures, little or no fines. <br /> O c� N of coarse fraction <br /> U) To w is larger than No. GM Silty gravels, gravel-sand-silt mixtures, non-plastic fines. <br /> CI •au > 4 sieve Gravels with <br /> — <br /> I <br /> Z is .N fines <br /> E o GC Clayey gravels, gravel-sand-clay mixtures, plastic fines. <br /> o N <br /> O Lc o Clean Sands SW Well-graded sands, sands with gravel, little or no fines. <br /> I <br /> vwj c Z SANDS (less than — <br /> Q2 More than 50% 5%fines) SP Poorly-graded sands, sands with gravel, little or no fines. <br /> O o - of coarse fraction <br /> I U 2 is smaller than SM Silty sands, sand silt mixtures, non plastic fines. <br /> No. 4 sieve Sands with <br /> fines <br /> SC Clayey sands, sand-clay mixtures, plastic fines. <br /> Ia) ML Inorganic silts, rock flour, clayey silts with slight plasticity. <br /> a, SILTS AND CLAYS <br /> J (I) 'N <br /> I p • a, Liquid Limit is less than 50% CL Inorganic clays of low to medium plasticity. (Lean clay) <br /> is .� OL Organic silts and organic clays of low plasticity. <br /> Lii E o — <br /> E o N MH Inorganic silts, elastic. <br /> u•, o <br /> O , Z SILTS AND CLAYS <br /> Z 2 Liquid Limit is greater than 50% CH Inorganic clays of high plasticity. (Fat clay) <br /> o OH Organic clays of high plasticity. <br /> I <br /> HIGHLY ORGANIC SOILS PT Peat. <br /> DEFINITION OF TERMS AND SYMBOLS <br /> IN Standard Penetration 2" OUTSIDE DIAMETER SPILT SPOON SAMPLER <br /> u� Density Resistance in Blows/Foot <br /> J <br /> I <br /> Z 2.4" INSIDE DIAMETER RING SAMPLER OR <br /> p Very Loose 0-4 <br /> 4-10 It SHELBY TUBE SAMPLER <br /> to Loose <br /> = Medium Dense 10-30 y WATER LEVEL (Date) <br /> 0 Dense 30-50 <br /> C.) Very Dense >50 <br /> Tr TORVANE READINGS, tsf <br /> I Standard Penetration Pp PENETROMETER READING, tsf <br /> W Consistancy Resistance in Blows/Foot <br /> DD DRY DENSITY, pounds per cubic foot <br /> = Soft Soft 0-� LL LIQUID LIMIT, percent <br /> ' O Medium Stiff 4-8 <br /> U Stiff 8 16 PI PLASTIC INDEX <br /> Very Stiff 16-32 <br /> IHard >32 N STANDARD PENETRATION, blows per foot <br /> Terra UNIFIED SOIL CLASSIFICATION SYSTEM <br /> I <br /> Wieliq 6 ® Associates, Inc. RIVERSIDE BUSINESS PARK LOTS 2 AND 4 <br /> EVERETT, WASHINGTON <br /> Consultants in Geotechnical Engineering <br /> Geology Earthaad Proj. No.T-7388-1 Date DEC 2016 Figure A-1 <br /> I <br /> Environmental Sciences 9 <br />