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UNIFIED SOIL CLASSIFICATION SYSTEM <br />MAJOR DIVISIONS <br />SYMBOLS <br />DESCRIPTIONS <br />GRAPH <br />LETTER <br />GW <br />WELL -GRADED GRAVELS OR nRAVEL•SANO <br />MIXTURES, <br />CLEAN <br />LITTLE OR NO R.ES <br />' <br />GRAVELS <br />o, o, <br />POORLY GRADED GRAVELS OR GRAVEL <br />GRAVEL AND <br />GP <br />-SAND <br />MIXTURES. LITTLE OR NO FINES <br />GRAVELLY <br />•. •• <br />, <br />, , <br />GM <br />SILTY GRAVELS OR GRAVEL- SAND -SILT <br />MIXTURES <br />SOILS <br />GRAVELS <br />WITH FINES <br />CLAYEY GRAVELS OR GRAVEL -SAND -CLAY <br />COARSE <br />GC <br />MIXTURES <br />GRAINED <br />SW <br />WELL -GRADED SANDS OR GRAVELLY SANDS. <br />LITTLE OR NO FINES <br />SOILS <br />CLEAN <br />SANDS <br />POORLY -GRADED SANDS OR GRAVELLY SANDS, <br />SP <br />LITTLE OR NO FINES <br />SAND AND <br />SANDY SOILS <br />SILTY SANDS OR SAND -SILT MIXTURES <br />SM <br />SANDS WITH <br />FINES <br />LEAVEN SANDS OR SANG -CLAY MIXTURES <br />SC <br />MIL <br />INORGANIC SILTS AND VERY FINE SANDS,ROCK <br />FLOUR.SILTY OR CLAYEY <br />FINE SANDSOR <br />CLAYEY SILTS WITH SLIGHT PLASTICITY <br />CL <br />INORGANIC CLAYS OF LOW TO MEDIUM <br />PLASTICITY, GRAVELLY CLAYS. SANDY CLAYS. <br />SILTS AND CLAYS <br />SILTY CLAYS, LEAN CLAYS <br />Liquid limit less than 50 <br />-_ <br />OL <br />ORGANIC SILTS AND ORGANIC SILTY CLAYS OF <br />LOW PLASTICITY <br />FINE GRAINED <br />SOILS <br />_- <br />INORGANIC SILTS. MICACEOUS OR <br />MH <br />DIATOMACEOUS FINE SAND OR SILTY SOILS <br />SILTS AND CLAYS <br />CH <br />INORGANIC CLAYS OF HIGH -PLASTICITY <br />Liquid limit greater than 50 <br />ORGANIC CLAYS OF MEDIUM TO <br />OH <br />-HIGH <br />PLASTICITY, ORGANIC SILTS <br />HIGHLY ORGANIC SOILS <br />PT I <br />PEAT OR OTHER HIGHLY ORGANIC SOILS <br />{ TOPSOIL / FILL <br />R!R'PAI <br />TOPSOIL OR FILL MAY CONTAIN ABUNDANT <br />l ORGANIC MATERIAL <br />LOG SYMBOL LEGEND <br />® SPT sample interval TS Torvane reading (TSF) WELL SYMBOLS <br />. Shelby tube sample interval VS Van, reading ITSFI ocking Monument <br />entonits Sul <br />Modified California ample interval MC Moisture content <br />B <br />Cutting ample LL Liquid limit ilica Send <br />Oil <br />❑ Cara PI Plasticity index <br />lotted Pipa <br />Water loyal <br />G ES, 1 nc _ <br />KEY CHART <br />