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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 />0Q0 o <br />GW <br />WELL -GRADED GRAVELS, GRAVEL - <br />GRAVEL <br />SAND MIXTURES <br />AND <br />3 O o <br />GRAVELLY <br />(LITTLEOR NO FINES) <br />O O <br />GP <br />POORLY -GRADED GRAVELS, <br />SOILS <br />O O <br />GRAVEL - SAND MIXTURES <br />GRAVELS WITH <br />C <br />GM <br />SILTY GRAVELS, GRAVEL -SAND - <br />COARSE <br />GRAINED <br />MORE THAN 50% <br />FINES <br />SLT MIXTURES <br />SOILS <br />OF COARSE <br />FRACTION RETAINED <br />ON NO. 4 SIEVE <br />(APPRECIABLE AMOUNT <br />GC <br />CLAYEY GRAVELS, GRAVEL -SAND - <br />OFFINES) <br />O <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 />AND <br />(LITTLE OR NO FINES) <br />NO. 200 SIEVE <br />SP <br />POORLY -GRADED SANDS, GRAVELLY <br />SANDY <br />SAND <br />SOILS <br />SANDS WITH <br />SM <br />SILTY SANDS, SAND - SILT MIXTURES <br />MORE THAN 50% <br />OF COARSE <br />FINES <br />FRACTION PASSING <br />SC <br />CLAYEY SANDS, SAND - CLAY <br />ON NO. 4 SIEVE <br />(APPRECIABLE AMOUNT <br />OF FINES) <br />MIXTURES <br />INORGANIC SILTS, ROCK FLOUR, <br />ML <br />CLAYEY SILTS 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 />CLAYS, SANDY CLAYS, SILTY CLAYS, <br />GRAINED <br />LESS THAN 50 <br />LEAN CLAYS <br />OL <br />ORGANIC SILTS AND ORGANIC SILTY <br />SOILS <br />CLAYS OF LOW PLASTICITY <br />MORE THAN 50% <br />MH <br />INORGANIC SILTS, MICACEOUS OR <br />PASSING <br />DIATOMACEOUS SILTYSOILS <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 />NOTE: Multiple symbols are used to indicate borderline or dual soil classifications <br />Sampler Symbol Descriptions <br />® 2.4-inch I.D. split barrel / Dames & Moore (D&M) <br />® Standard Penetration Test (SPT) <br />■ Shelby tube <br />® Piston <br />Direct -Push <br />m Bulk 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 />�SYMBOLS <br />TYPICAL <br />DESCRIPTIONS <br />_:RAPH <br />LETTER <br />AC <br />Asphalt Concrete <br />CC <br />Cement Concrete <br />CR <br />Crushed Rock/ <br />Quarry Spalls <br />i 0 1/ <br />1, \\1, \%1, <br />SOD <br />Sod/Forest Duff <br />TS <br />Topsoil <br />Groundwater Contact <br />Measured groundwater level in exploration, <br />well, or piezometer <br />7 Measured free product in well or piezometerI <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 Percent fines <br />%G Percent gravel <br />AL Atterberg limits <br />CA Chemical analysis <br />CID Laboratory compaction test <br />CS Consolidation test <br />DD Dry density <br />DS Direct shear <br />HA Hydrometer analysis <br />MC Moisture content <br />MD Moisture content and dry density <br />Mohs Mohs hardness scale <br />OC Organic content <br />PM Permeability or hydraulic conductivity <br />PI Plasticity index <br />PL Point lead test <br />PP Pocket penetrometer <br />SA Sieve analysis <br />TX Triaxial compression <br />UC Unconfined compression <br />UU Unconsolidated undrained triaxial compression <br />VS Vane shear <br />Sheen Classification <br />"WOH" indicates sampler pushed using the weight of the NS No Visible Sheen <br />hammer. SS Slight Sheen <br />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 />GMENGINEERS FigureA-1 <br />Rev 01/2022 <br />