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GROUP <br /> Auger CuttingsMAJOR DIVISIONS TYPICAL NAMES Undisturbed SampleSYMBOLS <br />CLEAN t' GW Well graded gravels, gravel - sand X Split Spoon Sample 4 Bulk Samplemixtures, little or no fines. <br />GRAVELS ?Lt.(1'15/Soor (Little or no lines) 0 6°G p Poorly graded graveis or grave - sand Rock Core Crandall Sainplermixtures, little or no fines.3, hcoarse fraction is 'MILLARGER than the GRAVELS °LA GM Silty gravels, gravel - sand - silt mixtures.Dilatometer Pressure Meter <br />No. 4 sieve size)WITH FINES U hCOARSE <br />GRAINED (Appreciable Clayey gravels, gravel - sand - clay O No RecoveryPacker <br />SOILS amount of fines)mixtures. <br />(More than 50% of Well graded sands, gravelly sands, little ormaterial is CLEAN no fines.Water Table at time of drilling Water Table after 24 hours <br />LARGER than No. <br />200 sieve size)SANDS SANDS <br />Uvlore than 50% of (Little or no fines)Poorly graded sands or gravelly sands, <br />little or no fines. <br />coarse fraction is <br />SMALLER than <br />the No. 4 Sieve SANDS Say sands, sand - silt mixtures <br />Size)WITH FINES <br />A <br />.A <br />A <br />lA <br />A <br />.A <br />(Appreciable <br />amount of fines)Clayey sands, sand - clay mixtures. <br />FINE <br />GRAINED <br />SOILS <br />(More than 50% of <br />material is <br />SMALLER than <br />No. 200 sieve size) <br />SILTS AND CLAYS <br />(Liquid limit LESS than 50) <br />SILTS AND CLAYS <br />(Liquid limit GREATER than 50) <br />SW <br />SP <br />SM <br />0 SC <br />ML <br />''ll11, <br />lllltt <br />0L <br />MH <br />Inorganic silts and very fine sands, rock <br />Ilour, silty of clayey fine sands or clayey <br />silts and with slight Blasticity. <br />Inorganic lays of low to medium plasticity, <br />gravelly clays, sandy clays, silty clays, lean <br />days. <br />Organic silts and organic silty clays of low <br />plasticity. <br />Inorganic silts, micaceous or diatomaccous <br />fine sandy or silty soils, elastic silts. <br />Inorganic clays of high plasticity, fat clays <br />Correlation of Penetration Resistance <br />with Relative Density and Consistency <br />SAND & GRAVEL SILT & CLAY <br />No. of Blows Relative Density No. of Blows Consistency <br />0-4 Very Loose 0-1 Very Soft <br />5-10 Loose 2-4 Soft <br />11 - 30 Medium Dense 5-8 Medium Stiff <br />31 - 50 Dense 9-15 Stiff <br />Over 50 Very Dense 16 - 30 Very Stiff <br />Over 30 Hard <br />OH Organic clays of medium to high <br />plasticity, organic silts. <br />-- <br />HIGHLY ORGANIC SOILS 4 0 4 PT Feat and other highly organic soils. <br />BOUNDARY CLASSIFICATIONS: Soils possessing characteristics of two groups are designated by <br />combinations ofgroup symbols. <br />SILT OR CLAY <br />SAND GRAVEL <br />Cobbles Boulders <br />Fine Medium Coarse Fine Coarse <br />KEY TO SYMBOLS AND <br />DESCRIPTIONS <br />No.200 No.40 No. 10 No.4 ·3/4" 3" 12" <br />U.S. STANDARD SIEVE SIZE <br />Reference: The Unified Soil Classification System, Corps of Engineers, U.S. Army Technical <br />Memorandum No. 3-357, Vol. 1, March, 1953 (Revised April, 1960) <br />:YMACTE C <br />23 <br />FIGURE A-2