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Unified Soil Classification System <br /> Major Divisions Symbols Typical Names <br /> GW Well-graded gravels or gravel-sand mixtures, <br /> little or no fines <br /> Gravels <br /> GP Poorly-graded gravels or gravel-sand mixtures, <br /> (More than half of little or no fines <br /> y > coarse fraction> <br /> •o .N no.4 sieve size) GM Silty gravels,gravel-sand-silt mixtures <br /> N o <br /> m 0 GC Clayey gravels,gravel-sand-clay mixtures <br /> CA: <br /> L <br /> 0 o 0 SW Well-graded sands or gravelly sands, little or no fines <br /> d <br /> ;n Sands <br /> c L SP Poorly-graded sands or gravelly sands, little or no fines <br /> 0 -CTJ <br /> (More than half of <br /> o coarse fraction< SM Silty sands,sand-silt mixtures <br /> E no.4 sieve size) <br /> SC Clayey sands, sand-clay mixtures <br /> N ML Inorganic silts and very fine sands, rock flour,silty <br /> N fine sands or clayey silts with slight plasticity <br /> a� <br /> N °� Silts and Clays CL Inorganic clays of low to medium plasticity,gravelly <br /> NN LL — < 50 clays,sandy clays, lean clays <br /> d OL Organic silts and organic silty clays of low plasticity <br /> C v <br /> ZA MH Inorganic silts, micaceous or diatomaceous fine sandy <br /> or silty soils, elastic silts <br /> L Silts and ClaysCH Inorganic clays of high plasticity, fat clays <br /> ILLCa LL - > 50 <br /> E OH Organic clays of high plasticity,organic silty clays, <br /> organic silts <br /> Highly Organic Soils pt Peat and other highly organic soils <br /> Grain Size Chart <br /> Range of Grain Sizes <br /> Classification U.S.Standard Grain Size <br /> Sieve Size in Millimeters <br /> Boulders Above 12" Above 305 <br /> Cobbles 12"to 3" 305 to 76.2 <br /> Gravel 3"to No.4 76.2 to 4.76 <br /> coarse 3"to 3/4" 76.2 to 19.1 <br /> fine 3/4"to No.4 19.1 to 4.76 <br /> Sand No.4 to No.200 4.76 to 0.074 <br /> coarse No.4 to No.10 4.76 to 2.00 ATTORNEY <br /> medium No.10 to No.40 2.00 to 0.420 - CLIENT <br /> fine No.40 to No.200 0.420 to 0.074 WORK n;MM Ic j <br /> Silt and Clay Below No. 200 Below 0.074 PRIVILLGLO & (.i i0 IDLNTIAL <br /> NORTH PARCEL <br /> Stockton, California CLASSIFICATION CHART <br /> 7kk1&%4dEJU10 ___FFigureProjectNo. 2001.02 4 <br />