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SOIL CLASSIFICATION CHART <br />ADDITIONAL MATERIAL SYMBOLS <br />SYMBOLS <br />TYPICAL <br />MAJOR DIVISIONS <br />GRAPH <br />LETTER <br />DESCRIPTIONS <br />CLEAN GRAVELS <br />0777 <br />o <br />GW <br />WELL -GRADED GRAVELS. GRAVEL - <br />GRAVEL <br />U <br />SAND MIXTURES <br />AND <br />GRAVELLY <br />NTrLE ON NO FINEST <br />000o <br />GP <br />POORLY -GRADED GRAVELS. <br />SOILS <br />o o <br />GRAVEL - SAND MIXTURES <br />COARSE <br />GRAVELS WITH <br />in <br />GM <br />SILTY GRAVELS. GRAVEL - SAND - <br />GRAINED <br />MORE THAN 50x, <br />FINES <br />SLT MIXTURES <br />SOILS <br />OF COARSE <br />FRACTION RETAINE <br />ON NO 4 SIEVE <br />(APPRECIABLE n INC <br />GC <br />CLAYEY GRAVELS. GRAVEL - SAND - <br />OF FINES) <br />0 <br />CLAY MIXTURES <br />SW <br />WELL -GRADED SANDS. GRAVELLY <br />CLEAN SANDS <br />SANDS <br />MORE THAN 50% <br />SAND <br />RETAINED ON <br />NO 200 SIEVE <br />AND <br />(LITTLE OR NO FINEST <br />SANDY <br />SP <br />POORLY -GRADED SANDS. GRAVELLY <br />SAND <br />SOILS <br />SANDS WITH <br />SM <br />SILTY SANDS. SAND -SILT MIXTURES <br />MORE THAN 50'x' <br />OF COARSE <br />FINES <br />FRACTION PASSING <br />ON NO 4 SIEVE <br />(APPRECIABLEAMaINT <br />�. <br />CLAYEY SANDS. SAND - CLAY <br />OF FINEST <br />MIXTURES <br />INORGANIC SILTS, ROCK FLOUR, <br />MIL <br />CLAYEY SLTS WITH SLIGHT <br />PLASTICITY <br />INORGANIC CLAYS OF LOW TO <br />SILTS AND <br />LIQUID LIMIT <br />CL <br />MEDIUM PLASTICITY. GRAVELLY <br />FINE <br />CLAYS <br />LESS THAN 50 <br />CLAYS. SANDY CLAYS. SILTY CLAYS, <br />GRAINED <br />LEAN CLAYS <br />OL <br />ORGANIC SILTS AND ORGANIC SILTY <br />SOILS <br />CLAYS OF LOW PLASTICITY <br />MORE THAN Sax. <br />MH <br />INORGANIC SILTS. MICACEOUS OR <br />PASSING <br />DIATOMACEOUS SILTY SOILS <br />NO 200 SIEVE <br />SILTS AND <br />CLAYS <br />LIQUID LIMIT GREATER <br />CH <br />INORGANIC CLAYS OF HIGH <br />THAN 50 <br />PLASTICITY <br />OH <br />ORGANIC CLAYS AND SILTS OF <br />MEDIUM TO HIGH PLASTICITY <br />HIGHLY ORGANIC SOILS <br />PT <br />PEAT, HUMUS. SWAMP SOILS WITH <br />HIGH ORGANIC CONTENTS <br />NU I L: Multiple symbols are used to indicate borderline or dual soil classifications <br />Sampler Symbol Descriptions <br />® 2.44inch I.D. split barrel <br />® Standard Penetration Test (SPT) <br />■ Shelby tube <br />® Piston <br />UDirect -Push <br />mBulk or grab <br />® Continuous Coring <br />Blowcount is recorded for driven samplers as the number of <br />blows required to advance sampler 12 inches (or distance noted). <br />See exploration log for hammer weight and drop. <br />"P" indicates sampler pushed using the weight of the drill rig. <br />"WOH" indicates sampler pushed using the weight of the <br />hammer. <br />SYMBOLS <br />TYPICAL <br />DESCRIPTIONS <br />GRAPH <br />LETTER <br />AC <br />Asphalt Concrete <br />CC <br />Cement Concrete <br />CR <br />Crushed Rock/ <br />Quarry Spalls <br />I <br />SOD <br />Sod/Forest Duff <br />TS <br />Topsoil <br />Groundwater Contact <br />T Measured groundwater level in exploration, <br />well, or piezometer <br />7 Measured free product in well or piezometer <br />Graphic Log Contact <br />Distinct contact between soil strata <br />/ Approximate contact between soil strata <br />Material Description Contact <br />Contact between geologic units <br />____ Contact between soil of the same geologic <br />unit <br />Laboratory / Field Tests <br />%F <br />Percent fines <br />%G <br />Percent gravel <br />AL <br />Atterberg limits <br />CA <br />Chemical analysis <br />CP <br />Laboratory compaction test <br />CS <br />Consolidation test <br />DD <br />Dry density <br />DS <br />Direct shear <br />HA <br />Hydrometer analysis <br />MC <br />Moisture content <br />MD <br />Moisture content and dry density <br />Mohs <br />Mohs hardness scale <br />OC <br />Organic content <br />PM <br />Permeability or hydraulic conductivity <br />PI <br />Plasticity index <br />PL <br />Point lead test <br />PP <br />Pocket penetrometer <br />SA <br />Sieve analysis <br />TX <br />Triaxial compression <br />UC <br />Unconfined compression <br />VS <br />Vane shear <br />Sheen Classification <br />NS <br />No Visible Sheen <br />SS <br />Slight Sheen <br />MS <br />Moderate Sheen <br />HS <br />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 />GEOENGINEER� FigureA-1 <br />Rev 07/2019 <br />