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MAJOR DIVISIONS <br />LETTER <br />TYPICAL DESCRIPTION <br />SYMBOL <br />CLEAN <br />GW <br />a -yra a graves, gravel -sand mixtures, little <br />GRAVELS <br />GRAVELS <br />or no fines. <br />Poorly -graded gravels, gravel -sand mixtures, <br />a)More <br />than 50% <br /><5% fines <br />GP <br />little or no fines. <br />GM <br />Silty gravels gravel -sand -silt mixtures, <br />°r <br />Z m <br />of coarse <br />Q <br />m <br />ro <br />fraction is larger <br />GRAVELS <br />non -plastic tines. <br />GC <br />Clayey gravels, gravel -sand -clay mixtures, <br />Cn a'_) <br />than No. 4 sieve <br />with fines <br />Ur <br />J <br />m <br />plastic fines. <br />LU <br />0 <br />E <br />S <br />w <br />SANDS <br />CLEANU) <br />SW <br />Well -graded sands, gravelly sands, little or no <br />CO <br />o <br />S <br />z <br />More than 50% <br />SANDS <br />fines. <br />SIP <br />Poorly -graded sands or gravelly sands, little or <br />Q <br />C <br />of coarse <br /><5 /° fines <br />no fines. <br />Silty sands, sand -silt mixtures, non -plastic fines. <br />O <br />fraction is <br />SM <br />U <br />a) <br />smaller than No. <br />SANDS <br />o <br />4 sieve <br />with fines <br />SC <br />Clayey sands, sand -clay mixtures, plastic fines. <br />°�fiT <br />ML <br />Inorganic silts, roc s our, c ayey si wi s ig <br />p <br />`° <br />W <br />'(n <br />SILTS AND CLAYS <br />plasticity. <br />—inorganic clays o ow o medium plasticity, can <br />w <br />z <br />m <br />o <br />Liquid limits <br />CL <br />clay). <br />OL <br />Organic silts and organic clays of low plasticity. <br />J Z <br />less than 50% <br />0 <br />U` <br />O <br />MH <br />Inorganic silts, elastic. <br />w <br />c`o <br />r <br />SILTS AND CLAYS <br />z <br />`m <br />Liquid limits greater <br />CH <br />Inorganic clays of high plasticity, (fat clays). <br />u- <br />o <br />to <br />E <br />than 50% <br />OH <br />Organic clays of high plasticity. <br />rn <br />HIGHLY ORGANIC SOILS <br />PT <br />Peat. <br />DEFINITION OF TERMS AND SYMBOLS <br />Densit SPT (Blows/Foot) <br />2" Outside diameter split spoon <br />O <br />t I <br />Very loose 0 4 <br />Z sampler <br />p <br />Z <br />> <br />Q <br />Loose 4-10 <br />Medium dense 10-30 <br />2.4" Inside diameter ring sampler or <br />Q <br />IX <br />Dense 30-50 <br />Shelby tube <br />CI) <br />U <br />Very dense >50 <br />1 Water level (date) <br />Tr Torvane reading, tsf <br />Consistency SPT (Blows/Foot) <br />Very soft 0-2 <br />Pp Penetrometer reading, tsf <br />` <br />0 <br />Soft 2-4 <br />DD Dry density, pcf <br />J <br />Q <br />Medium stiff 4-8 <br />LL Liquid limit, percent <br />U <br />Stiff 8-15 <br />PI Plasticity index <br />Very stiff 15-30 <br />N Standard penetration, blows per foot <br />Hard >30 <br />Fueling Facility <br />MEFred,bk�j,e,• <br />The Riley Gr otip, Inc. <br />Unified Soil ClasS;,lca ion S)7slent <br />Figure /f-% <br />T1 17522 BOTHELL WAY NE <br />L- <br />HOl-11BLL, WASHINGTON 98011 <br />Site Address: 12906 Bothell-Bvere❑ Highway, Everett, Washington <br />