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M � <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> — � Major Divisions Symbols Typical Names <br /> GW Well-graded gravels or gravel-sand mixtures, little or no fines <br /> Gravels <br /> o c <br /> More than half of <br /> GP Poorly-graded gravels or gravel-sand mixtures, little or no fines <br /> v = coarse fraction > GM Silty gravels, gravel-sand-silt mixtures <br /> m m Nno. 4 sieve size) <br /> GC Clayey gravels, gravel-sand-clay mixtures <br /> � m <br /> SW Well-graded sands or gravelly sands, little or no fines <br /> m Sands <br /> -- ( £ m (More than half of SP Poorly-graded sands or gravelly sands, little or no fines <br /> ` o m coarse fraction < SM Silty sands, sand-silt mixtures <br /> E no. 4 sieve size) <br /> _ SC Clayey sands, sand-clay mixtures <br /> ML Inorganic slits and clayey silts of low plasticity, sandy silts, gravelly silts <br /> •o N Silts and Clays <br /> LL = < 50 CL Inorganic clays of low to medium plasticity, gravelly clays, sandy clays, lean clays <br /> OL Organic silts and organic silt-clays of low plasticity <br /> r o MH Inorganic silts of high plasticity <br /> mm o Silts and Clays CH Inorganic clays of high plasticity, fat clays <br /> c_ o c LL = > 50 <br /> 1 � ) LLE ° OH Organic silts and clays of high plasticity <br /> r _ Highly Organic Soils PT Peat and other highly organic soils <br /> !. _) SAMPLE DESIGNATIONS/SYMBOLS <br /> GRAIN SIZE CHART <br /> (.. ) Sample taken with Sprague & Henwood split-barrel sampler with a <br /> Range of Grain Sizes e 3.0-inch outside diameter and a 2.43-inch inside diameter. Darkened <br /> Classification U.S. Standard Grain Size area indicates soil recovered <br /> l Sieve Size in Millimeters Z Classification sample taken with Standard Penetration Test sampler <br /> Boulders Above 12" Above 305 <br /> Cobbles 12" to 3" 305 to 76.2 m Undisturbed sample taken with thin-walled tube <br /> Gravel 3" to No. 4 76.2 to 4.76 <br /> coarse 30 to TV 76.2 to 19.1 ® Disturbed sample <br /> ( - � fine 314n to No. 4 19.1 to 4.76 <br /> Sand No, 4 to No. 200 4.76 to 0.075 <br /> ,. ) coarse No. 4to No. 10 4.761o2.00 rol <br /> Sampling attempted with no recovery <br /> medium No. 10 to No, 40 2.00 to 0.420 <br /> „) fine No. 40 to No. 200 0.420 to 0.075 m Core sample <br /> Silt and Clay Below No. 200 Below 0.075 <br /> Fel Analytical laboratory sample <br /> 7 Unstabilized groundwater level ® Sample taken with Direct Push sampler <br /> ( - -;) V Stabilized groundwater level <br /> Sonic <br /> f ) <br /> ( Jj SAMPLERTYPE <br /> C Core barrel PT Pitcher tube sampler using 3.0-inch outside diameter, <br /> thin-walled Shelby tube <br /> f- - -) CA California split-barrel sampler with 2.5-inch outside <br /> diameter and a 1 .93-inch inside diameter S&H Sprague & Henwood split-barrel sampler with a 3.0-inch <br /> outside diameter and a 2.43-inch inside diameter <br /> - D&M Dames & Moore piston sampler using 2.5-inch outside <br /> diameter, thin-walled tube SPT Standard Penetration Test (SPT) split-barrel sampler with <br /> a 2.0-inch outside diameter and a 1 .5-inch inside diameter <br /> O Osterberg piston sampler using 3.0-inch outside diameter, <br /> thin-walled Shelby tube ST Shelby Tube (3.0-inch outside diameter, thin-walled tube) <br /> advanced with hydraulic pressure <br /> 130 NORTH HUNTER STREET <br /> Stockton, California CLASSIFICATION CHART <br /> Tr <br /> ■ eaftel'VLfoRdlo Date 01/24/08 1 Project No. 2597. 11 Figure A-7 <br />