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qPH <br />>H <br />C�1�H <br />9HG'1 <br />z <br />qc <br />OH <br />H L71 t7 <br />0. 0 <br />9 HI <br />t HH <br />�yH <br />C] C VJ <br />��trs7 <br />H O CCA <br />SOIL <br />CLASSIFICATION SYSTEM <br />MAJOR <br />LETTER <br />DIVISIONS SYMBOL <br />GRAPH <br />SYMBOL TYPICAL DESCRIPTION <br />GRAVELS <br />Clean <br />GW <br />o, o <br />:Q,':o. <br />Well -graded gravels, gravel -sand mixtures, <br />U <br />Gravels <br />little or no fines. <br />J <br />o <br />More than 50% of <br />(less than <br />GP <br />Poorly -graded gravels, gravel -sand nixtures, <br />rn <br />`m <br />coarse fraction <br />5% fines). <br />_ <br />little or no fines. <br />GM <br />Silty gravels, gravel -sand -silt mixturrs, <br />O <br />uJ <br />m N <br />`m '� <br />is larger than <br />Gravels <br />• . <br />non -plastic fines. <br />Z <br />m w <br />No. 4 sieve. <br />with fines.GC <br />WVIA <br />Clayey gravels, gravel -sand -clay mixtures. <br />Q <br />E <br />plastic fines. <br />0 <br />0 o <br />SANDS <br />Clean <br />SW <br />Well -graded sands, gravelly sands, <br />LO o <br />Sands <br />little or no fines. <br />W cr)m <br />N <br />More than 50% of <br />(less than <br />SP <br />Poorly -graded sands or gravelly sands, <br />Y Z <br />5% fines). <br />little or no nines. <br />SM <br />Silty sands, sand -silt mixtures, <br />Q d C <br />coarse fraction <br />O <br />0 t <br />is smaller than <br />Sands <br />non -plastic fines. <br />U <br />_ <br />No. 4 sieve. <br />with tines. <br />SC <br />VIIA <br />Clayey sands, sand -clay mixtures, <br />Plastic fines. <br />Cl) <br />SILTS AND CLAYS <br />ML <br />Inorganib silts an very fine san S, rock flour, <br />s'It or claye fine sands or clayey silts with <br />m <br />O <br />rn <br />- <br />m o <br />Liquid limit is less than 50%. <br />CL <br />Inorganic clays of w to.meolum plasticity, <br />ravelly clays, sa4y clays, silty clays, lean <br />WE <br />N <br />ae !i <br />OL <br />Organic silts and organic clays of low- <br />Z <br />C)", <br />plasticity. <br />a <br />SILTS AND CLAYS <br />MH <br />Inorganic silts, micaceous or diatomaceous <br />CC <br />r « N <br />fine sandy or silty soils, elastic. <br />C7 <br />Liquid limit is greater than 50% <br />CH <br />Inorganic clays of high piasticity, fat clays. <br />UJ <br />Z <br />0 w- <br />E •- <br />m y <br />OH <br />' <br />Organic clays of medium to high plasticdy,- <br />LL <br />' <br />' ' <br />organic silts. <br />HIGHLY <br />ORGANIC SOILS <br />PT <br />" ' <br />Peat and other highly organic soils. <br />DEFINITION OF TERMS AND SYMBOLS <br />I <br />2" OUTER DIAMETER <br />SPLIT SPOON SAMPLER <br />C TORVA14E READING,•tsf <br />2.4" INNER DIAMETER RING SAMPLER <br />OR SHELBY <br />4U <br />1L <br />TUBE SAMPLER <br />PENETROMETER READING, tsf <br />P <br />SAMPLER PUSHED <br />W MOISTURE, percent of dry weight <br />* <br />SAMPLE NOT RECOVERED <br />PCf DRY DENSITY, pounds per cubic foot <br />S1 <br />'WATER LEVEL (DATE) <br />LL LIQUID LIMIT,percent <br />WATER OBSERVATION WELL <br />Pl PLASTIC INDEX <br />N STANDA^D PENETRATION, blows per foot <br />TERRA <br />Woodbrook Apartments <br />-- ASSOCIATES <br />Everett Washington <br />No. 1005 <br />Date 4/89 <br />Figure 3 <br />Geotechnical Consultants <br />Proj. <br />