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EA ENGINEERING <br /> SCIENCE,AND UNIFIED SOIL CLASSIFICATION SYSTEM AND <br /> TECHNOLOGY SYMBOLS USED ON EA DRILL LOGS <br />�t <br /> Major Divisions Typical Names <br /> Well graded gravels with or without sand, little or <br /> clean gravels GW ._,.0. no fines <br /> GRAVELS with little or no _ _ _• Poorly graded gravels with or without sand, little <br /> fines GP <br /> � L more than half or no fines <br /> � � � <br /> coarse fraction GM Silty gravels, silty gravels with sand <br /> in 8 E> is larger than gravels with <br />' w co> No 4 sieve size over 12%fines am Cla a ravels,cla a ravels with sand <br /> QoGC YY9 YY9 <br /> Cc .c o Well graded sands with or without gravel, little or <br /> tit c c SANDS clean sands with SW no tines <br /> little or no fines SP Poorly graded sands with or without gravels, <br /> (DCC <br /> L little or no fines <br /> a0 E more than half <br /> v coarse fraction SM Sifty sands with or without gravel <br />' is smaller than sands with <br /> No 4 sieve size over 12%fines SC Clayey sands with or without gravel <br />' <br /> ML Inorganic silts and very fine sands, rock flour, <br /> silts with sands and gravels <br /> (0 � SILTS AND CLAYS Inorganic clays of low to medium plasticity,days <br /> Jliquid limit 50%or less CL with sands and gravels, lean clays <br /> ON S <br /> o a, OL Organic silts or clays of low plasticity <br /> w `!' in <br /> Z v o Inorganic silts, micaceous or diatomaceous,fine <br />' fr C o 11 MH sandy or silty soils, elastic silts <br /> Lb -4ii Z SILTS AND CLAYS <br /> Z °' liquid limit greater than 50% CH Inorganic clays of high plasticity,fat clays <br />' LL E <br /> rN-./A.0-1 .1 Organic silts or clays of medium to high <br /> OH plasticity <br /> HIGHLY ORGANIC SOILS pt Peat and other highly organic soils <br /> SYMBOLS DRILL LOG <br />' ROCK TYPES <br /> First encountered water Limestone <br /> Static groundwaterTIT, Dolomite <br /> Portland cement =_ _____ Mudstone <br /> Bentonite pellets = Sihstone <br /> Sand <br /> Blank Sandstone <br /> Screened casing <br /> i�itii i�i�i�i�i�• Igneous <br /> 1 <br />