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UNIFIED SOIL CLASSIFICATION SYSTEM ri <br /> GROUPGRA G IC <br /> MAJOR DIVISION SYMBOL DESCRIPTION LO <br /> GRAVELLY SOILS CLEAN GRAVELLY WELL GRADED GRAVELS <br /> GW ORR <br /> GAVEL - SAND MIXTURES .� <br /> • SOILS POORLY GILADLD GRAVELS OIL <br /> N OVER 60°6 OF LITTLE OR NOPOORLY GRADED <br /> GP GRAVEL SAND SILT MIXTU11ES <br /> • COARSE FRACTION <br /> rLARGER THAN SILTY GRAVELS OR POORLY GRADED �- <br /> GRAVELLY SOILS GRAVEL - SAND SILT MIXTURES k •fl <br /> �1 <br /> a m NO 4 SIEVE SIZE WITH FINES GM /.jam-* — <br /> NX <br /> CLAYEY GRAVELS OR POORLY GRADED <br /> m OVER l24'o FINES <br /> GC GRAVEL - SAND - CLAY MLXTURES i CLEAN SANDYWELL CRADED SANDS _7 IL <br /> M� oo c SANDY SOILS SOILS SW OR GRAVELLY SANDS <br /> L a <br /> POORLY GRADED SANDS I <br /> Cl OVER 50% OF LITTLE OR NO SP OR GRAVELLY SANDS I <br /> COARSE FRACTION SANDY SOILS I 1 <br /> SMALLER TITAN SILTY SANDS OR POORLY GRADED <br /> UWITH FINES SM SAND - SILT MIXTURES <br /> NO 4 SIEVE SIZE CLAYEY SANDS OR POORLY GRADED <br /> OVER 12% FINES SC SAND - CLAY MIXTURES ' <br /> INORGANIC SILTS, VERY FINE SANDS <br /> H SILTY/CLAYEY FINE SANDS, CLAYEY 1 5 <br /> ML SILTS WITH SLIGHT PLASTICITY i <br /> �+ • SILTY AND CLAYEY SOILS INORGANIC CLAYS-LOW TO MEDIUM ®R! �/j <br /> C, <br /> • CL PLASTICITY, CRAVELLY, SANDY,51T,TY 011 LI:AX CLAYS <br /> N LIQUID LIMIT LESS THAN 50 <br /> a m ORCANIC CLAYS Oft IC SILTY <br /> OL CLAYS OF LOW PLASTICITY <br /> m c <br /> INORGANIC SILTS, MICACEOUS OR <br /> m a DIATOMACEOUS FINE SANDY QR SILTY <br /> MH SOILS OR ELASTIC SILTS <br /> ILC <br /> t SILTY AND CLAYEY SOILS INORGANIC CLAYS OF RICH i <br /> CH PLASTICITY, OR FAT CLAYS FirL. LIQUID LIMIT GREATER THAN 50 r <br /> ORGANIC CLAYS OF MEDIUM TO HIGII <br /> Itz" OH PLASTICITY, OR ORCANIC SILTS <br /> HIGHLY ORGANIC SOILS Pt ORCANIC°SOIL R HIGHLY f— <br /> SYMBOLS L <br /> MPLE TYPES. WATER LEVEL <br /> UNDISTURBED SLEEVE r <br /> DISTURBED WATER INFL-OW <br /> UNSUCCESSFUL ATTEMPT TW <br /> ODOR OBSERVATION <br /> NO NONE OBSERVED MD MODERATE ODOR r I <br /> ! SL SLIGHT ODOR ST STRONG ODOR L <br /> � I <br /> PHOTOVAC TIP READINGS " I <br /> IN PARTS PER MILLION (PPM) L <br /> i <br /> tGEND TO LOGS PLATE A-2 <br />