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: Tr <br /> s.. <br /> EA ENGINEEMNG, <br /> SCIENCE.AND UNIFIED SOIL CLASSIFICATION SYSTEM AND <br /> TECHNOLOGY SYMBOLS USED ON EA DRILL LOGS <br /> Major Divisions Typical Names <br /> Well graded gravels with or without sand,rds cr <br /> clean gravels GW ,Y:f fv: fines. <br /> GRAVELS with little or no W•_• Poorly,graded gravels with cr without sand,Tittle <br /> fines GP ':i;: or no fines. <br /> m more than half <br /> N 12 a coarse traction GM Silty gravels,silty graveis vAh sand. <br /> 0 8 m is larger than gravels with <br /> Z u+Co No.4 sieve size over 12%6 tines GC clayey gravels,clayey gravels with sand. <br /> N <br /> cr= - Well graded sands with or with-out gravel.little or <br /> 01-- 10 lit SANDS clean sands with SW ti �._ luras. <br /> ca@ little or no fines SP ;., ..::: Poorly graded sands with or without gravets, <br /> CC <br /> :.�; =*: ultra or no fines_ <br /> 0 more than half <br /> r U coarse fractionSM Silly sands with or without gravel. <br /> is smaller than sands with <br /> No.4 sieve size over 120/6 fines Clayey sands with or without gravel <br /> SC <br /> I Inorganic silts and very fine sands,rock flour.. <br /> j ML sifts with sands and gravels. <br /> SILTS AND CLAYS Inorganic days of low to medium plasticity,days <br /> liquid limit 50%or lei CL with sands and gravels,lean days. <br /> yy f. <br /> m OL Organic silts or clays of raw plasticity- <br /> UJ <br /> — ¢ MH Inorganic sifts.micaceous or diatomacious,tine <br /> j c sandy or silty soils,elastic sifts. <br /> tij w z SILTS AND CLAYS <br /> CH Inorganic clays high Testi Y•tat clays. <br /> ` liquid limit greater than 50% <br /> Uo <br /> ' '" Organic silts or clays of medium to high <br /> _i OH • ••• <br /> - � . .., plasticity. <br /> HIGHLY ORGANIC SOILS Pt Peat and other highly organic soils. <br /> DRILL LOG <br /> SYMBOLS ROCK TYPES <br /> € 7 First encountered water Limestone <br /> s _ Static groundwater Dolomite <br /> Portland cement ———— --- Mudstone <br /> I Bentonite pellats ---- — _ Sihstone <br /> j. Sand <br /> Blank . . . . .. Sandstone <br /> . Screened casing i i��i�i i i <br /> i r • < < ti . tgneoGs <br />