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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> Major Divisions Symbols Typical Names <br /> NGW Well graded gravels or gravel-sand mixtures,little or no fines <br /> y Gravels <br /> ' c � (More than half of GP Poorly-graded gravels or gravel-sand mixtures,little or no fines <br /> coarse fraction GM Salty gravels,gravel-sand-silt mixtures <br /> ar $ N no 4 sieve size) <br /> m o m GC Clayey gravels,gravel-sand-clay mixtures <br /> �? = m SW Well graded sands or gravelly sands,little or no fines <br /> N Sands <br /> (More than half of SP Poorly-graded sands or gravelly sands, little or no fines <br /> -S coarse fraction< <br /> v m SM Silty sands,sand silt mixtures <br /> E no 4 sieve size) <br /> SC Clayey sands,sand-clay mixtures <br /> W — ML Inorganic silts and clayey silts of low plasticity,sandy silts,gravelly silts <br /> o N N Slits and Clays <br /> rn o InCL Inorganic clays of low to medium plasticity,gravelly clays,sandy clays,lean clays <br /> m LL=<50 <br /> t m OL Organic silts and organic silt-clays of low plasticity <br /> CD <br /> MH Inorganic silts of high plasticity <br /> ' c_ o � Silts L and 510ays CH Inorganic clays of high plasticity,fat clays <br /> tL E v OH Organic silts and clays of high plasticity <br /> Highly Organic Soils PT Peat and other highly organic soils <br /> SAMPLE DESIGNATIONS/SYMBOLS <br /> GRAIN SIZE CHART Sample taken with Sprague&Henwood split-barrel sampler with <br /> Range of Grain Sizes El a 3 0-inch outside diameter and a 2 43-inch inside diameter <br /> Classification U S Standard Grain Size Darkened area indicates soil recovered <br /> Sieve Size In Milllmeters ® Classification sample taken with Standard Penetration Test <br /> Boulders Above 12" Above 305 sampler <br /> Cobbles 12'to 3" 305 to 76 2 <br /> Gravel 3'to No 4 76 2 to 4 76 n] <br /> Undisturbed sample taken with thin-walled tube <br /> coarse 3"to 3/4' 76 2 to 19 1 <br /> ' fine 3/4'to No 4 19 1 to 4 76 Disturbed sample <br /> Sand No 4 to No 200 4 76 to 0 074 <br /> coarse No 4 to No 10 4 76 to 2 00 <br /> No 10 to No 40 2 00 t0 4 <br /> fine t Fol Sampling attempted with no recovery <br /> ' fine No 40 to No 20D 0 420 to 0 077 4 <br /> Silt and Clay Below No 200 Below 0 074 m <br /> Core sample <br /> ' V Unstabilized groundwater level Q Analytical laboratory sample <br /> V Stabilized groundwater level <br /> Sample taken with Direct Push sampler <br /> 1 SAMPLER TYPE <br /> C Core barrel PT Pitcher tube sampler using 3 0-inch outside diameter, <br /> ' thin-walled Shelby tube <br /> 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 /> &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 /> O Osterberg piston sampler using 3 0-inch outside a 2 0-inch outside diameter and a 1 5-inch inside diameter <br /> i <br /> / diameter,thin-walled Shelby tube ST Shelby Tube(3 0-inch outside diameter,thin-walled tube) <br /> advanced with hydraulic pressure <br /> NORTH SHORE <br /> STOCKTON HOUSING <br /> AND REDEVELOPMENT DEPARTMENT CLASSIFICATION CHART <br /> Stockton, Callfomla <br /> Date 04/02/04 Protect No 2597 10 Figure A-1 <br />