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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> • Mayor Division Ltr Description Major Division Ltr Description <br /> well roiled Gravels or lrxorgarik S4ta and very <br /> res. Sands, rock flour, <br /> Gill! —Sand mixtures, ML Silty or Goysy fine Sande, <br /> httis or no fines or Clayey Silts with slight <br /> plastic <br /> PoorlGravelsded Graor Silts Inorganic of low to <br /> Gravel Iftle oor <br /> GP eSaSo no fine nd mixtures, �nemediumplay city, Gravelly <br /> and ittlClays CL Ckiys. Sandy Cloys Silty <br /> Gravelly LL<50 Ck". L-m Goys <br /> Solis GM Silty Grovels. Gravel—Sand— <br /> Silt mixtures <br /> OL Mac" <br /> Silty and Organic <br /> Fine- OL of low plasticity <br /> Coarse- cc clayey Gravel, Gravel-sand- Grained <br /> Grained Clay mixtures Soils Inorganic Silts, micaceous <br /> Sails or dwtomoceous firm <br /> Sandi or Silty sols <br /> Well—graded Sand or elastic Silts <br /> SIN no�I�Iy Sands, little or Silts <br /> and CH Inorganic Clays of high <br /> Sand P@adY—graded Sands or Clays plasticity, fat Clays <br /> and 5P Gravelly <br /> ve sSanda Ktle or LL>50 <br /> no Sandy <br /> Cloys oya of medium <br /> SOUS Sm Silty Sands, Sand—Sat OH to high plostkity, organic <br /> mixtures Silts <br /> Highly Peat and other highly <br /> Sc ml am nom' end— Organic P� manic @ails. <br /> Soils <br /> WELL CONSTRUCTION SYMBOLS <br /> IDepth through which <br /> sampler is driven Neat cement <br /> s. <br /> sample <br /> Relatively undisturbed Sand pack <br /> p (Monterey Sand 13) <br /> No sample recovered ■ <br /> Bentonite <br /> = Static water level <br /> observed in well/boring ® Blank PVC <br /> y Initial water level <br /> observed in well/boring <br /> S-10 Sample number ® Machine-slotted PVC <br /> Note Blowsrepresent the number of blows of a 140--pound hammer <br /> failing 30 Inches to drive the sampler through each <br /> 6 inches of an 18—inch penetration <br /> Dashed lines separating formations on the log represent approximate <br /> boundaries only Actual boundaries may be gradual Logs represent <br /> subsurface condibxons at the boring location at the time of drilling only <br /> HORIZON ENVIRONMENTAL INC. BORNG LOG SYMBOL KEY <br />