Laserfiche WebLink
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 2 N of coarse fraction <br /> U) F0 U) is larger than No. GM Silty gravels, gravel-sand-silt mixtures, non-plastic fines. <br /> `m > 4 sieve Gravels with <br /> zFn fines GC Clayey gravels, gravel-sand-clay mixtures, plastic fines. <br /> coE <br /> Q C <br /> o 0 <br /> O � o Clean Sands SW Well-graded sands, sands with gravel, little or no fines. <br /> LU co c z SANDS (less than <br /> Q � More than 50% 5%fines) Sp Poorly-graded sands, sands with gravel, little or no fines. <br /> O o " 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 <br /> SC Clayey sands, sand-clay mixtures, plastic fines. <br /> L <br /> ML Inorganic silts, rock flour, clayey silts with slight plasticity. <br /> co <br /> J U .� SILTS AND CLAYS <br /> p Ta m Liquid Limit is less than 50% CL Inorganic clays of low to medium plasticity. (Lean clay) <br /> M 'Cn OL Organic silts and organic clays of low plasticity. <br /> LU z E o <br /> 0 <br /> oMH Inorganic silts, elastic. <br /> O , z SILTS AND CLAYS <br /> W � C o CH Inorganic clays of high plasticity. (Fat clay) <br /> Z =. o Liquid Limit is greater than 50/o <br /> E: <br /> o OH Organic clays of high plasticity. <br /> HIGHLY ORGANIC SOILS PT Peat. <br /> DEFINITION OF TERMS AND SYMBOLS <br /> Standard Penetration 2"OUTSIDE DIAMETER SPILT SPOON SAMPLER <br /> W Density Resistance in Blows/Foot <br /> z 2.4" INSIDE DIAMETER RING SAMPLER OR <br /> O Very Loose 0-4 SHELBY TUBE SAMPLER <br /> cn Loose 4-10 <br /> = Medium Dense 10-30 = WATER LEVEL(Date) <br /> O Dense 30-50 <br /> V Very Dense >50 <br /> Tr TORVANE READINGS,tsf <br /> Standard Penetration Pp PENETROMETER READING, tsf <br /> W Consistancy Resistance in Blows/Foot <br /> � DD DRY DENSITY, pounds per cubic foot <br /> in Very Soft 0-2 <br /> W Soft 2-4 LL LIQUID LIMIT, percent <br /> 2 <br /> O Medium Stiff 4-8 <br /> U Stiff 8-16 PI PLASTIC INDEX <br /> Very Stiff 16-32 <br /> Hard >32 N STANDARD PENETRATION, blows per foot <br /> w.: Terra UNIFIED SOIL CLASSIFICATION SYSTEM <br /> BAYWOOD INDUSTRIAL <br /> Associates, Inc. EVERETT, WASHINGTON <br /> Consultants in Geotechnical Engineering <br /> Geology and Pro No.T-8221 Date: OCT 2020 Figure A-1 <br /> Environmental Earth Sciences �• g <br />