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ATC Env i ronmento !, Inc . <br /> UniFied Soil ClossiFica-tion System <br /> Legend <br /> I MAJOR DIVISIONS SYMBOL PATTERN TYPICAL DESCRIPTION <br /> u 1 GW Well graded grovels and gravel-sand mixtures with <br /> GW OOlittle or no r:nes <br /> Clean grovels <br /> with tittle or ,e/oo'co GP Poorly graded ravels and grovel-sand mixtures <br /> GRAVELS no Fincs GP G<1 4 a <br /> U� II J- Qoe4oe�apo' with little or no mss <br /> C 000 au no <br /> F--I u c a c "' Silty gravels and poorly graded gravel-sand-silt <br /> C 50% or more of the coarse M <br /> Cn Fraction ie retained on a G M a s e mixtures <br /> i No 9 sieve Gravels with <br /> e over 12% Fines GC Clayey grovels and poorly graded gravel-sand-clay <br /> Z o G C mixtures <br /> aro ted° <br /> SW Well graded sands and gravelly sands with little <br /> [ v S W - or no fines <br /> I Clean sands <br /> Lj W ,CrD withlittle or <br /> SANDS no Fines SP Poorly graded sands and gravelly sands with <br /> S P <br /> _� little or no Fines <br /> Q L <br /> U <br /> C-D� Wore than 50% of the coarse S M SM Silty sands and Poorly graded sand-silt mixtures <br /> a <br /> rractin passes through a �7 <br /> No 9 sieve Sands with <br /> 1 over 12%IOL <br /> SC Clayey sands and poorly graded sand-clay mixtures <br /> SC <br /> ML Inorganic silts and very Fine sands rock Flour <br /> } f�L silt or clayey Fine sands or clayey silts with <br /> SILTS & CLAYS sl �t losticit <br /> 1 CL Inorganic clays of low to medium plasticity <br /> © C L gravelly clays sandy cloys silt clays or lean <br /> CfD$ Liquid limit 50% or less clays <br />' a Organic silts and organic silty clays of low_W 0 L plasticity <br /> QMH Inorganic silts micaceous or diatomaceous Fine <br /> ` SILTS & CLAYS MH sandy or silty soils elastic silts <br /> ry <br /> � <br />' W CH Inorganic clays of high plasticity and Fat clays <br /> CH <br /> L.� i5 L i qu i d limit greater than 50% <br /> » OH Organic clays of medium to high plasticity and <br /> 0 H organic silts <br /> Pt Peat, mulch and other highly organic soils <br /> HIGHLY ORGANIC SOILS Pt <br /> MOISTURE CONTENT SPT BLOW COUNTS <br /> SANDS CLAYS <br /> DRY Little or no perceptible moisture 0_1 Very Loose 0-2 Very Sort <br />' DAMP Some perceptible moisture, not compactible 5-10 Loaee 3-9 Sort <br /> MOIST Compactible some liquid can be dirrused From the soil 11-30 Medium Dense 5-8 Medium Stirr <br /> WET Above compactible range sort will smudge or smear 31-50 Dense 9-15 StiFF' <br /> SATURATED Pores voide Filled with water >50 Very Dense 16-30 Very Stiff <br /> >30 Hord <br />