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SOIL CLASSIFICATION CHART <br />ADDITIONAL MATERIAL SYMBOLS <br />MAJOR DIVISIONS <br />SYMBOLS <br />TYPICAL <br />DESCRIPTIONS <br />GRAPH <br />LETTER <br />GRAVEL <br />CLEAN <br />GRAVELS <br />'Z e o <br />GW <br />WELL -GRADED GRAVELS, <br />GRAVELGRAVEL -SAND MIXTURES <br />AND <br />GRAVELLY <br />SOILS <br />(UTILE OR NO FINES) <br />o a <br />o o <br />o L <br />GP <br />POORLY -GRADED GRAVELS, <br />GRAVEL - SAND MIXTURES <br />GRAVELS WITH <br />FINES <br />\ <br />GM <br />SILTY GRAVELS. GRAVEL - SAND <br />-SILT MIXTURES <br />COARSE <br />GRAINED <br />SOILS <br />MORE THAN 60%OF <br />COARSE FRACTION <br />y <br />RETAINED ON NO.4 <br />SIEVE <br />(APPrsaaBLE ArnrxnNr <br />OF FINES) <br />GC <br />CLAYEY GRAVELS. GRAVEL - <br />SAND - CLAY MIXTURES <br />CLEAN SANDS <br />SW <br />WELL -GRADED SANS, <br />GRAVELLY SANDS <br />MORE THAN 60% <br />SIEVE RETAINED NO. <br />2�5 <br />SAND <br />AND <br />SANDY <br />(UrILEORNOFINLS) <br />SP <br />POORLY -GRADED SANS. <br />GRAVELLY SAND <br />SOILS <br />SANDS WITH <br />FINES <br />SM <br />SAND-SILT <br />SILTYMIXTURES <br />MIXTURES <br />MORE THAN50 OF <br />COARSE FRACTION <br />PASSING NO.4 <br />SC <br />CLAYEY SANS. SAND -CLAY <br />MIXTURES <br />SIEVE <br />(APPRECIABLE AMOUNT <br />OF FINES) <br />ML <br />INORGANIC SILTS. ROCK FLOUR, <br />CLAYEY SILTS WITH SLIGHT <br />PLASTICITY <br />FINE <br />GRAINED <br />SILTS <br />AND <br />CLAYS <br />LgUID LMR <br />LESS THAN 50 <br />/ <br />CL <br />INORGANIC CLAYS OF LOW TO <br />MEDIUM PLASTICITY, GRAVELLY <br />CLAYS. SANDY CLAYS, SILTY <br />CLAYS, LEAN CLAYS <br />,i. <br />OL <br />ORGANIC SILTS AN ORGANIC <br />SILTY CLAYS OF LOW <br />SOILS <br />.1. <br />PLASTICITY <br />MORE THAN 5VA <br />PASSING NO.200 <br />SIEVE <br />INORGANIC SILTS. <br />OR DIATCEOO SILOILS <br />SILTS <br />AND <br />CLAYS <br />GRLK]UID LIdR EATER THAN SO <br />CH <br />INORGANIC CLAYS OF HIGH <br />PLASTICITY <br />�I 1 <br />OH <br />ORGANIC CLAYS AND SILTS OF <br />MEDIUM TO HIGH PLASTICITY <br />h h.l <br />HIGHLY ORGANIC SOILS <br />_ _ _ <br />_ = <br />PT <br />PEAT, HUMUS, SWAMP SOILS <br />WITH HIGH ORGANIC CONTENTS <br />NOTE: Multiple syrnbols are used to indicate borderline or dual soil classifications <br />Sampler Symbol Descriptions <br />® <br />2.4-inch I.D. split barrel <br />Standard Penetration Test (SPT) <br />■ <br />Shelbytube <br />® <br />Piston <br />ID <br />Direct -Push <br />® <br />Bulk or grab <br />® <br />Continuous Coring <br />Blowcount is recorded for driven samplers as the number <br />of blows required to advance sampler 12 inches (or <br />distance noted). See exploration log for hammer weight <br />and drop. <br />A "P" indicates sampler pushed using the weight of the <br />drill rig. <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 />is <br />Topsoil/ <br />Forest Duff/Sod <br />Groundwater Contact <br />TMeasured groundwater level in <br />exploration, well, or piiezometer <br />17 Measured free product in well or <br />piezometer <br />Graphic Lou Contact <br />Distinct contact between soil strata or <br />geologic units <br />Approximate location of soil strata <br />change within a geologic soil unit <br />Material Description Contact <br />Distinct contact between soil strata or <br />geologic units <br />____ Approximate location of soil strata <br />change within a geologic soil unit <br />Laboratory / Field Tests <br />%F <br />Percent fines <br />AL <br />Atterberg limits <br />CA <br />Chemical analysis <br />CID <br />Laboratory compaction test <br />CS <br />Consolidation test <br />DS <br />Direct shear <br />HA <br />Hydrometer analysis <br />MC <br />Moisture content <br />MD <br />Moisture content and dry density <br />OC <br />Organic content <br />PM <br />Permeability or hydraulic conductivity <br />PI <br />Plasticity index <br />PP <br />Pocket penetrometer <br />PPM <br />Parts per million <br />SA <br />Sieve analysis <br />TX <br />Triaxial compression <br />UC <br />Unconfined compression <br />VS <br />Vane shear <br />heen Classification <br />NS <br />No Visible Sheen <br />SS <br />Slight Sheen <br />MS <br />Moderate Sheen <br />HS <br />Heavy Sheen <br />NT <br />Not Tested <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 />E(jE EE FIGUREA-1 <br />