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EA ENGINEERING <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, little or <br /> clean gravels GWno tines <br />' GRAVELS with little or no <br /> _ Poorly graded gravels with or without sand,little <br /> rn ftries GP - - or no fines <br /> J 0 more than half " <br />' U) C as coarse fraction GM Silly gravels,silty gravels with sand <br /> o $ ggravels with <br /> m is larger than <br /> Liu U) No 4 sieve size over 12%fines • • • • Clayey gravels,clayey gravels with sand <br /> Z a GC <br />' `c `\J Well graded sands with or without gravel, little or <br /> 0 <br /> CU Z clean sands with SW - no tines <br /> CC � <br /> SANDS little or no fines SP Poorly graded sands with or without gravels, <br /> more than half little or no fines <br /> O E coarse fractionSM Silty 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 /> Inorganic silts and very fine sands, rock flour. <br /> ML silts with sands and gravels <br />' cn t SILTS AND CLAYS Inorganic clays of low to medium plasticity,clays <br /> J " liquid limit 50%or less CL with sands and gravels,lean clays <br /> m JHz <br /> Organic sats or clays of low plasticity <br /> S2 F0 <br /> Q t N Inorganic sifts, micaceous or diatomaceous,fine <br /> sandy or silty sols, elastic silts <br /> o <br /> Lb Z SILTS AND CLAYS Inorganic clays of high plasticity,fat clays <br /> liquid limit greater than 50% <br /> E Organic silts or clays of medium to high <br /> plasticity <br /> HIGHLY ORGANIC SOILS pt Peat and other highly organic soils <br /> DRILL LOG <br /> SYMBOLS ROCK TYPES <br /> L.emestone <br /> First encountered water <br /> Static groundwater _- - Dolomite <br /> Portland cement --- —- __ Mudstone <br /> Bentonite pellets __=_ Siltstone <br /> Sand <br /> Blank Sandstone <br /> Screened casing <br /> Igneous <br />