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SOIL CLASSIFICATION CHART ADDITIONAL MATERIAL SYMBOLS <br /> MAJOR DIVISIONS SYMBOLS TYPICAL SYMBOLS TYPICAL <br /> GRAPH LETTER DESCRIPTIONS GRAPH LETTER DESCRIPTIONS <br /> WELLGRADEDGRAVELS,GRAVEL <br /> CLEAN GRAVELS o C,° GW - <br /> GRAVEL SAND MIXTURES AC Asphalt Concrete <br /> ANDD (i <br /> GRAVELLY (LITTLE OR NO FINES) o 0C 13P GRAVELS, \ \ \ <br /> v <br /> SOILS 0 0 o o GP GRAVEL-SAND MIXTURES �� <br /> vvvviv CC Cement Concrete <br /> COARSE GRAVELS WITH GM SILTY GRAVELS,GRAVEL-SAND- <br /> GR <br /> GRAINED MORE THAN 50% <br /> FINES SI LT MIXTURES Crushed Rock/ <br /> SOILS OF COARSE CR <br /> FRACTION RETAINED o Quarry Spalls <br /> OF <br /> ON NO.4 SIEVE (APPRECIABLENES) <br /> NE AMOUNT o GC CLAY EY GRAVELS,GRAVEL-SAND- <br /> o CLAY MIXTURES <br /> SOD Sod/Forest Duff <br /> Sw WELL GRADED SANDS,GRAVELLY <br /> CLEAN SANDS SANDS <br /> MORE THAN 50% SAND <br /> RETAINED ON AND (LITTLE OR NO FINES) o TS Topsoil <br /> NO.200 SIEVE POORLYGRADEDSANDS,GRAVELLY <br /> SANDY SP SAND <br /> SOILS <br /> MORE THAN 50% SANDS WITH SM SILTY SANDS,SAND-SILT MIXTURES <br /> OF COARSE FINESGroundwater Contact <br /> FRACTION PASSING <br /> ON NO.4 SIEVE <br /> (aPPREciaaLEamouNTS`. CLAYEY SANDS,SAND-CLAY � Measured groundwater level in exploration, <br /> OF FINES) MIXTURES <br /> well,or piezometer <br /> INORGANIC SILTS,ROCK FLOUR, <br /> ML CLAYEY SILTS WITH SLIGHT <br /> PLASTICITY Measured free product in well or piezometer <br /> INORGANIC CLAYS OF LOW TO <br /> SILTS AND MEDIUM S SANDY(LAY GRAVELLY Graphic Log Contact <br /> CLAYS LIQUID LIMIT CL CLAYS,SANDY CLAYS,SILTY CLAYS, <br /> FINE LESS THAN 50 LEAN CLAYS <br /> GRAINED <br /> SOILS ORGAN IC SI LTS AN D ORGAN IC SI LTY Distinct contact between soil strata <br /> OL CLAYS OF LOW PLASTICITY <br /> / Approximate contact between soil strata <br /> MORE THAN 50% INORGANIC SILTS,MICACEOUS OR <br /> PASSING MH DIATOMACEOUS SILTY SOILS <br /> NO.200 SIEVE Material Description Contact <br /> SILTSAND <br /> D LIQUID LIMIT GREATERCH INORGANIC CLAYS OF HIGH Contact between geologic units <br /> THAN 50 PLASTICITY <br /> 0 o ORGANIC CLAYS AND SILTS OF ____ Contact between soil of the same geologic <br /> OH MEDIUM TO HIGH PLASTICITY unit <br /> HIGHLY ORGANIC SOILS PT PEAT,HUMUS,SWAMP SOILS WITH Laboratory/HIGH ORGANIC CONTENTS y/ Field Tests <br /> NOTE: Multiple symbols are used to indicate borderline or dual soil classifications %F Percent fines <br /> /oG Percent gravel <br /> AL Atterberg limits <br /> Sampler Symbol Descriptions CA Chemical analysis <br /> CP Laboratory compaction test <br /> ® 2.4-inch I.D.split barrel CS Consolidation test <br /> DD Dry density <br /> Standard Penetration Test(SPT) DS Direct shear <br /> ■ HA Hydrometer analysis <br /> Shelby tube MC Moisture content <br /> Piston MD Moisture content and dry density <br /> Mohs Mohs hardness scale <br /> Direct-Push OC Organic content <br /> PM Permeability or hydraulic conductivity <br /> M Bulk or grab PI Plasticity index <br /> PL Point load test <br /> ® Continuous Coring PP Pocket penetrometer <br /> SA Sieve analysis <br /> Blowcount is recorded for driven samplers as the number of U Triaxial compression <br /> blows required to advance sampler 12 inches(or distance noted). S Unconfined compression <br /> V <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 /> Key to Exploration Logs <br /> GWENGINEERS� Figure B-1 <br /> Rev 09/2020 <br />