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ATC Environmental, Inc <br /> 1 <br /> UniF Fed Soil ClasslF kation System <br /> Legend <br /> MAJOR DIVISIONS SYMBOL PATTERN TYPICAL DESCRIPTION <br /> ,4� 4i GW Well graded grovels and gravel-sand mixtures with <br /> (jW ,dam little or no Fines <br /> C I cangrave I e °dj <br /> with little or DOD'APOP GP Poorlygraded grovels and ravel-sand mixtures <br /> en GRAVELS no fines GP P(Ipl&ae with little g <br /> eor no Fines <br /> Ta 0 aAo no ao <br /> H , , , , GM Silty grovels and poorly graded gravel-sand-silt <br /> C 15 50% or more of the coarse r mixtures <br />' CJ] Fraction is rotained on o G M e e e e <br /> z No 9 sieve Grovels with <br /> o over 12X Fines GC Clayey grovels and poorly graded gravel-sand-clay <br /> o G C mixtures <br /> r • SW Well graded sands and gravelly sands with little <br />' LO or no Fines <br /> I <br /> I.. Clean sande W <br /> GfD with little or SP Poorlygraded sands andgravellysands with <br /> � o SANDS no Fines SP <br /> Q little or no Fines <br /> O u <br /> U <br /> SM Silty sands and poorly graded sand-silt mixtures <br /> More than SOY of the coarse <br /> Fraction passes through a SM <br /> No 9 sieve Sands with <br /> over 12X finesSC SC Clayey sands and poorly graded sand-clay mixtures <br /> t <br /> } M L sLltlnor9onlc clayeyiFine sands or ine sands cour <br /> orclayeysrltswith <br /> r with <br /> & CLAYS sli Kt losticit <br /> HCL Inorganic clays of low to medium plasticity <br /> O C L gravelly clays sandy clays, silty cloys or lean <br /> C.0$ Liquid limit 50% or less clays <br /> OL Organic silts and organic silty clays of law <br /> LSI 0 L plasticity <br /> �t <br /> MH Inorganic silts, micaceous or diatomaceous Fine <br /> DC <br /> SILTS $ CLAYS <br /> MH sandy ar silty soils elastic silts <br /> CH inorganic clays of high plasticity and Fat clays <br /> z CH <br /> Liquid 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 CLATS <br /> DRY Little or no perceptible moisture 0-9 Very Loose 0-2 Very SOFT <br />' DAMP Some perceptible moisture not compactible 5-10 Loa" 3-9 Sart <br /> MOIST Compactible some liquid con be diffused From the soil 11-30 Medium Dense 5-8 Medium Stiff <br /> WET Above compactible range soil will smudge or smear 31-50 Dense 9-15 Stiff' <br /> SATURATED Pares voids Filled with water >50 Very Dense 16-30 Very StiFF <br />' >30 Hord <br /> 1 <br />