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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 /> Gravels <br /> to °_ (More than half of GP Poorly-graded gravels or gravel sand mixtures little or no fines <br /> MQ coarse fraction> GM Silty gravels gravel sand-silt mixtures <br /> N no 4 Steve size) <br /> o0 GC Clayey gravels gravel-sand-clay mixtures <br /> CD <br /> bmSW Well graded sands or gravelly sands little or no fines <br /> c Sands <br /> R L (More than half of SP Poorly-graded sands or gravelly sands little or no fines <br /> v w coarse fraction< <br /> ' SM <br /> 0 no 4 sieve size) Silty sands sand-silt mixtures <br /> SC Clayey sands,sand clay mixtures <br /> m N NML Inorganic silts and clayey silts of low plasticity sandy silts,gravelly silts <br /> Silts and Clays <br /> ' 75 m LL=<50 CL Inorganic clays of low to medium plasticity,gravelly clays sandy clays lean clays <br /> N OL Organic silts and organic silt-clays of low plasticity <br /> CO t o MH Inorganic silts of high plasticity <br /> c m Silts and Clays <br /> LL=>50 CH Inorganic Gays of high plasticity fat clays <br /> L` v OH Organic silts and clays of high plasticrty <br /> Highly Organic Soils PT Peal and other highly organic sods <br /> SAMPLE DESIGNATIONS/SYMBOLS <br /> GRAIN SIZE CHART <br /> Sample taken with Sprague&Henwood split barrel sampler with <br /> Range of Grain Sizes ea 3 0-inch outside diameter and a 2 43-inch inside diameter <br /> Classification US Standard Grain Size Darkened area indicates soil recovered <br /> Sieve Size In Millimeters <br /> Classification sample taken with Standard Penetration Test <br /> Boulders Above 12" Above 305 sampler <br /> Cobbles 3' 305 to 76 2 m <br /> Gravel 3""to to No 4 76 2 to 4 76 Undisturbed sample taken with thin walled tube <br /> coarse 3 to 76 2 to 19 1 <br /> No <br /> Fina 3!4 to No 4 19 1 to 4 76 <br /> 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 /> medium No i 0 fo No 40 2 00 to a 420 Sampling attempted with no recovery <br /> line No 40 to No 200 0 420 to 0 074 <br /> Sift and Clay Below No 200 Below 0 074 m <br /> Core sample <br /> V Unstabilized groundwater level Fel Analytical laboratory sample <br /> Stabilized groundwater level <br /> ® Sample taken with Direct Push sampler <br /> SAMPLER TYPE <br /> C Core barrel PT Pitcher tube sampler using 3 0-inch outside diameter, <br /> CA California split barrel sampler with 2 5 inch outside thin walled Shelby tube <br /> diameter and a 1 93 inch inside diameter SRH Sprague R Henwood split-barrel sampler with a 3 0-inch <br /> DRM Dames&Moore piston sampler using 2 5 inch outside outside diameter and a 2 43-inch inside diameter <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 /> 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 /> "'WeachmMI 0 lm6colb _ <br /> Date 04/02/04 Project No 259710 Figure A-1 <br />