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5 • • . <br /> SOIL CLASSIFICATION CHART ADDITIONAL MATERIAL SYMBOLS <br /> MAJOR DIVISIONS SYMBOLS TYPICAL SYMBOLS TYPICAL <br /> GRAPH LETTER DESCRIPTIONS GRAPH LETTER DESCRIPTIONS <br /> ovU < . <br /> CLEAN GRAVELS o CY GW SAND M XTUREGRAVELS,GRAVEL- <br /> GRAVEL ) „C AC Asphalt Concrete <br /> AND 3 0 0 <br /> GRAVELLY (UTTLE OR NOF INE% 0 0 C POORLY-GRADED GRAVELS, \ \ \ <br /> SOILS 3 0 o GP GRAVEL-SAND MIXTURES /‘// <br /> o /\/%/\ CC Cement Concrete <br /> COARSE < num,GRAVELS,GRAVEL-SAND • <br /> - <br /> GRAINED MORE THAN 50% GRAVELS WITH GM SILT MIXTURES <br /> SOILS OF COARSE FINES .II CR Crushed Rock/ <br /> FRACTION RETAINED i Abe <br /> y Quarry Spalls <br /> ON NO.4 SIEVE (APPRECIABLE AMOUNT jC CLAYEY GRAVELS,GRAVEL-SAND- • ' <br /> OF FINES) �/ GC CLAY MIXTURES 0), J I, d <br /> O C <br /> ), ,L/, ,v, SOD Sod/Forest Duff <br /> CLEAN SANDS <br /> SW SHEL-LRADED SANDS,GRAVELLY <br /> MORE THAN 50% SAND <br /> RETAINEDAND (LITTLE OR NO FINES) TS Topsoil <br /> N0.o.20000SIEVE SANDY SP POORLY-GRADED SANDS,GRAVELLY <br /> SOILS SAND +• <br /> SM SILTY SANDS,SAND-SILT MIXTURES <br /> MORE THAN 50% SANDS WITH <br /> OF COARSE FINES Groundwater Contact <br /> FRACTION PASSING <br /> ON NO.4 SIEVE / <br /> (APPRECIABLE AMOUNT Sc CLAYEY SANDS,SAND-CLAY . Measured groundwater level in exploration, <br /> OF FINES) MIXTURES <br /> well,or piezometer <br /> INORGANIC SILTS,ROCK FLOUR, <br /> ML PLASTICITYSILTS WITH SLIGHT C Measured free product in well or piezometer <br /> SILTS AND MED UM PLAST CIT1'GANIC CLAYS FGRAVELOW LLY <br /> FINE CLAYS LIQUID LIMIT j1 / CL I'LAYS,SANDYCLIAGSILNOLAYS, Graphic Log Contact <br /> LESS THAN 50 LEAN CLAYS <br /> GRAINED <br /> SOILS ORGANICSILTSANDORGANICSILN Distinct contact between soil strata <br /> OL CLAYS OF LOW PLASTICIN <br /> / Approximate contact between soil strata <br /> MORE THAN So% MnINORGANIC SUSS MICACEOUS OR <br /> PASSING I Material Description Contact <br /> NO.200 SIEVE <br /> SILTS AND LIQUID LIMIT GREATERINORGANIC CLAYS OF HIGH <br /> CLAYS THAN 50 CH PLASnCIN Contact between geologic units <br /> ORGANIC CLAYS AND SILTS OF ———— Contact between soil of the same geologic <br /> // OH MEDIUM TO HIGH PLASTICIN unit <br /> HIGHLY ORGANIC SOILS '` PT HIGH ORGANIC WAMPNTSILS WITH <br /> Laboratory/ Field Tests <br /> NOTE: Multiple symbols are used to indicate borderline or dual soil classifications %F Percent fines <br /> %G Percent gravel <br /> Sampler Symbol Descriptions AL Atterberg limits <br /> CA Chemical analysis <br /> 2.4-inch I.D.split barrel CP Laboratory compaction test <br /> CS Consolidation test <br /> IX Standard Penetration Test(SPT) DD Dry density <br /> ■ Shelby tube DS Direct shear <br /> HA Hydrometer analysis <br /> Piston MC Moisture content <br /> MD Moisture content and dry density <br /> II <br /> Direct-Push Mohs Mohs hardness scale <br /> OC Organic content <br /> Bulk or grab PM Permeability or hydraulic conductivity <br /> PI Plasticity index <br /> ffilContinuous Coring PP Pocket penetrometer <br /> SA Sieve analysis <br /> TBlowcount is recorded for driven samplers as the number of UC UnconfinedTriaol compressioncompression <br /> blows required to advance sampler 12 inches(or distance noted). S a <br /> See exploration log for hammer weight and drop. VS Vane shear <br /> "P"indicates sampler pushed using the weight of the drill rig. Sheen Classification <br /> NS No Visible Sheen <br /> "WOH"indicates sampler pushed using the weight of the SS Slight Sheen <br /> hammer. MS Moderate Sheen <br /> HS Heavy Sheen <br /> NOTE:The reader must refer to the discussion in the report text and the logs of explorations for a proper understanding of subsurface conditions. <br /> Descriptions on the logs apply only at the specific exploration locations and at the time the explorations were made;they are not warranted to be <br /> representative of subsurface conditions at other locations or times. <br /> / <br /> N,Key to Exploration Logs <br /> GEOENGINEERS FigureA-1 <br />