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SILTS AND CLAYS LIQUID LIMIT GREATER THAN 50% <br />SILTS AND CLAYS LIQUID LIMITS 50% OR LESS <br />DESCRIPTION <br />HIGHLY ORGANIC SOILS <br />SILTS AND CLAYS <br />200 40 10 4 <br />MAJOR TYPES <br />GW - Well graded gravels or gravel-sand mixtures <br />SC - Clayey sand, sand-clay mixtures <br />OL - Low plasticity organic silts and clays <br />MH - Inorganic silt with high plasticity <br />CH - Inorganic clay with high plasticity <br />OH - Highly plastic organic silts and clays <br />FINE <br />RELATIVE DENSITY <br />BLOWS/FOOT <br />GRAIN SIZES <br />KEY TO BORING LOGS <br />COARSEMEDIUM <br />3"12" <br />BOULDERSCOBBLESCOARSEFINE <br />PT - Peat and other highly organic soils <br />ML - Inorganic silt with low to medium plasticity <br />SAND GRAVEL <br />LINE TYPES <br />_ _ _ _ _ _ <br />GROUND-WATER SYMBOLS <br />MOISTURE CONDITION <br />GP - Poorly graded gravels or gravel-sand mixtures <br />SANDS AND GRAVELS <br />GM - Silty gravels, gravel-sand and silt mixtures <br />GC - Clayey gravels, gravel-sand and clay mixtures <br />SW - Well graded sands, or gravelly sand mixtures <br />SP - Poorly graded sands or gravelly sand mixtures <br />CL - Inorganic clay with low to medium plasticity <br />SILTS <br />AND <br />CLAYS <br />SAMPLER SYMBOLS <br />CONSISTENCY <br />U.S. STANDARD SERIES SIEVE SIZE CLEAR SQUARE SIEVE OPENINGS <br />SM - Silty sand, sand-silt mixtures <br />3/4 " <br />GRAVELS <br />MORE THAN HALF <br />COARSE FRACTION <br />IS LARGER THAN <br />NO. 4 SIEVE SIZE <br />SANDS <br />MORE THAN HALF <br />COARSE FRACTION <br />IS SMALLER THAN <br />NO. 4 SIEVE SIZE <br />CLEAN GRAVELS WITH <br />LITTLE OR NO FINES <br />GRAVELS WITH OVER <br />12 % FINES <br />CLEAN SANDS WITH <br />LITTLE OR NO FINES <br />SANDS WITH OVER <br />12 % FINESCO <br />A <br />R <br />S <br />E <br />- <br />G <br />R <br />A <br />I <br />N <br />E <br />D <br /> <br />S <br />O <br />I <br />L <br />S <br /> <br />M <br />O <br />R <br />E <br /> <br />T <br />H <br />A <br />N <br />HA <br />L <br />F <br /> <br />O <br />F <br /> <br />M <br />A <br />T <br />' <br />L <br /> <br />L <br />A <br />R <br />G <br />E <br />R <br /> <br />T <br />H <br />A <br />N <br /> <br /># <br />2 <br />0 <br />0 <br /> <br />S <br />I <br />E <br />V <br />E <br />TH <br />A <br />N <br /> <br /># <br />2 <br />0 <br />0 <br /> <br />S <br />I <br />E <br />V <br />E <br />FI <br />N <br />E <br />- <br />G <br />R <br />A <br />I <br />N <br />E <br />D <br /> <br />S <br />O <br />I <br />L <br />S <br /> <br />M <br />O <br />R <br />E <br />TH <br />A <br />N <br /> <br />H <br />A <br />L <br />F <br /> <br />O <br />F <br /> <br />M <br />A <br />T <br />' <br />L <br /> <br />S <br />M <br />A <br />L <br />L <br />E <br />R <br />VERY LOOSE <br />LOOSE <br />MEDIUM DENSE <br />DENSE <br />VERY DENSE <br />0-4 <br />4-10 <br />10-30 <br />30-50 <br />OVER 50 <br />VERY SOFT <br />SOFT <br />MEDIUM STIFF <br />STIFF <br />VERY STIFF <br />HARD <br />0-250 <br />250-500 <br />500-1,000 <br />1,000-2,000 <br />2,000-4,000 <br />> 4,000 <br />DRY <br />MOIST <br />WET <br />Absence of moisture, dusty, dry to touch <br />Damp but no visible water <br />Visible freewater <br />Solid - Layer Break <br />Dashed - Gradational or approximate layer break <br />Groundwater level during drilling <br />Stabilized groundwater level <br />Modified California (3-inch O.D.) Sampler <br />California (2.5-inch O.D.) Sampler <br />S.P.T. Split Spoon (2-inch O.D.) Sampler <br />Shelby Tube <br />Continuous Core <br />Bag Samples <br />Grab Samples <br />No Recovery <br /> Expect Excellence <br />NOTES <br />1.Standard Penetration Tests (S.P.T.) number of blows for a 140-pound <br />hammer falling 30 inches to drive a 2-inch O.D. (1-3/8-inch I.D.) sampler, <br />assuming 60% hammer efficiency <br />2.Approximate shear strength measured in field at time of drilling in units of <br />pounds per square foot <br />(S.P.T.)1 APPROXIMATE SHEAR <br />STRENGTH (PSF)2