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7o Boring Logs <br />PRIMARY <br />DIVISIONS <br />GROUP <br />Syntt+Ol. <br />SECONDARY DIVISIONS <br />' <br />GRAVELS CLEAN <br />GRAVELS <br />GW <br />Wstt graded gravels, gravtt•sar.d pustules. little or 00 ' <br />fines <br />S o <br />MORE THAN HALF CUSS, 1 WW <br />5% FINES) <br />GP <br />Poorly graded growls or gravel_s+nd rNstur s little or <br />Ho fu+es. t <br />STIFF <br />OF COARSE <br />8 -16 <br />VERY STIFF <br />to <br />" <br />FRACTION IS GRAVEL <br />GM <br />S;ttr gravels, grMI-Sand-sits en;alw a• fines. <br />W �+ <br />V1 <br />LARGER THAN WITH <br />4 FICHES <br />GC <br />--^•plats$ <br />z <br />NO. SIEVE <br />Clayey gravels. gravel•sand-dar m;atwe t;, plaatrc fines. <br />SANDS <br />CLEAN <br />SANDS <br />SW <br />well graded sarlds, gravelly sands little at to fines. <br />x sr _ <br />H <br />MORE TWIN HALF <br />ELESS THAN <br />S P <br />Fa♦orIV <br />OF COARSE <br />5% FINES) <br />sand <br />graded sands or gravelly s, little of to fines, <br />La <br />FRACTION IS <br />SANDS <br />SM <br />Silty sands,, sand -silt tntatwes. ewn-ptast;c fines, <br />SMALLER THAN <br />WITH <br />SC <br />Clayey sands. sand -day Wxtures, plash fines. <br />NO. 4 SIEVE <br />FINES <br />cc y <br />a� <br />SPITS AND CLAYS <br />ML <br />few nic ;Its in0 very fine sands, pock flow. sihy w <br />ei+Yh► �r+e ssnds.of silts with slight ptastiaty. <br />O <br />a <br />LIOUIO LIMIT IS <br />C L <br />Morl�anie clays of tow to coed;um plasticity. graveny <br />c�r+,Vrss, sand cta s silt ken <br />w <br />clays. clays. <br />w H g Go <br />LESS TttIW 50% <br />OL <br />4>9&- c silts and organic silty clays of low ptast;c ty. <br />cc�' <br />SILTS AND CLAYS <br />MH <br />Mw + saes, m'reaceous or d;stornueous fkv sandy or <br />1111 sats, elastic silts. <br />9 <br />LIOUIO LIMIT IS <br />GREATER Tti+W SO% <br />CH <br />Irw►park clays of hip% plasticity, tat clays. <br />.' <br />OH <br />Orpa4c clays of er+ediwn to M h ast;dI a T <br />rS Ot y, panic a ts. <br />HIGHLY ORGANIC SOILS <br />P17 <br />Peat and other highly organic Sorts. <br />DEFINITION OF TERMS• <br />U.S.•.STANOARO SERIES SIEVE CLEAR SOUARE SIEVE OPENINGS <br />200 40 10 4 3A' 3" 12* <br />SILTS AND CLAYS <br />SAND <br />GRAVEL <br />FINE <br />MEOIUM <br />COARSE <br />FINE <br />COARSE <br />COBBLES <br />BOULDERS <br />V <br />GRAIN SIZES <br />SANDS AND GRAVELS <br />13LOWS/FOOT t <br />VERY LOOSE <br />a- 4 <br />LOOSE <br />4_10 <br />MEDIUM DENSE <br />10-30 <br />DENSE <br />90 -50 <br />VERY DENSE <br />OWER 50 <br />SILTS AND CLAYS <br />STRENGTHg <br />BLJDWVFOOTf <br />VERY SOFT <br />O - t/4 <br />0- 2 <br />SOFT <br />1/4 - tY2 <br />2 - 4 <br />FIRM <br />- t) <br />4 - s <br />STIFF <br />i - 2 <br />8 -16 <br />VERY STIFF <br />2 - 4 <br />16 -32 <br />HARD <br />OVER 4 <br />•OVER 32 <br />RELATIVE DENSITY CONSISTENCY <br />Lf s"ber of blows of 140 pound t4ftmr falfnp 30 kvhes to bive a 2 inch O.O. (1-3/8incl► 1.03split spoon tASTM D-1586). <br />001confin44 =N wpreseft sirrveh in IenSA4. ft. as deeern+;ned by fatsorato.y testrrq or appro4mated <br />by the standard penetfatron test CASTM D•IS861 pocket pe+teIew"tee. sonans, or %visual observadon. <br />UNIFIED SOIL CLASSIFICATION SYSTEM <br />.(ASTM D-2487) <br />Soil Color derived from the MUNSELL Soil Color Charts <br />