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UNIFIED SOIL CLASSIFICATION SYSTEM GROUP GRAPHIC MAJOR DIVISION SYMBOL DESCRIPTION LOG WELL GRADED GRAVELS GRAVELLY 30IL3 CLEAN GRAVELLY GW OR GRAVEL - SAND MIXTURES "+ „ SOILS POORLY GRADED GRAVELS OIL '` -� OVER 60% OF LITTLE OR NO POORLY GRADED COARSE FRACTION GP GRAVEL -SAND SILT MIXTURES iw - ~ SILTY GRAVELS OR POORLY GRADED �- t LARGER THAN GRAVELLY SOILS GRAVEL - SAND SILT MIXTURES a `" NO s SIEVE SIZE WITH FINES GM Q 3 m CLAYEY GRAVELS OR POORLY GRADED ma OVER 12% FINES GC GRAVEL - SAND - CLAY MIXTURES v mz CLEAN SANDY WELL GRADED SANDS If 10L m ± SANDY SOILS SOILS OR GRAVELLY SANDSN LITTLE OR NO POORLY GRADED SANDS 5P OVER 60% OF OR GRAVELLY SANDS �+ I U r COARSE FRACTION SANDY SOILS L SILTY SANDS OR POORLY GRADED 1 0 SMALLER TIL&N 14 WITH FINES SM SAND - SILT MIXTURES r NO 4 SIEVE SIZE CLAYEY SANDS OR POORLY GRADED OVER 12% FINES SC SAND - CLAY MIXTURES ; INORGANIC SILTS, VERY FINE SANDS ►' SILTY/CLAYEY FINE SANDS, CLAYEY N ML SILTS WITH SLIGHT PLASTICITY � t SILTY AND CLAYEY SOILS INOTICANIC CLAYS-LOW TO MEDIUM �� PLASTICITY, GRAVELLY, SANDY, CL LIQUID LIMIT LESS THAN 50 r p m ORGANIC CLAYS OR ORGANIC SILTY I I f m a OL CLAYS OF LOW PLASTICITY I 14 m a INORGANIC SIL'T'S,MICACEOUS ORI z DIATOMACEOUS FINE SANDY Ott SILTY MH SOILS, OR ELASTIC SILTS SILTY AND CLAYEY SOILS INORGANIC CLAYS OF IIICII p f- CH PLASTICITY, OR FAT CLAYS L LIQUID LIMIT GREATER THAN 50 F C ORGANIC CLAYS OF MEDIUM TO HIGH IL OH PLASTICITY, OR ORGANIC SILTS HIGHLY ORGANIC SOILS PEAT OR OTHER HIGHLY Pt ORGANIC SOIL MPLE TYPES SYMBOLS i UNDISTURBED SLEEVE WATER LEVEL DISTURBED _ WATER INFLOW UNSUCCESSFUL ATTEMPT f ODOR OBSERVATION NO NONE OBSERVED MD MODERATE ODOR SL SLIGHT ODOR ST STRONG ODOR f PHOTOVAC TIP READINGS IN PARTS PER MILLION (PPM) _ k r LGEND TO LOGS PLATE A--2 j