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1 <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION <br /> GW Well—graded gravels or gravel and Inorganic silts and very fine sands <br /> sand mixtures little or no fines. ML rock flour silty or clayey fine <br /> Poorly—graded gravels or gravel SILTS sands or clayey silts with slight <br /> GRAVEL CA sand mixture, little or no fines AND plasticity <br /> AND CLAYS Inorganic clays or low to medium <br /> GRAVELLY Silty gravels gravel—sand—silt LL <50 CL plasticity, gravelly clays, sandy <br /> saLS <br /> GM <br /> 1 mixtures clays lean days <br /> GC Clayey grovels, gravel—sand—clay Organic silts and organic slit—clays <br /> COARSE <br /> GRAINED mixtures FINE OL of low plasticity <br /> SWlGRAINED <br /> SOILS Well—graded sands or gravelly SOILS Inarganrc days or low to medium <br /> sands, little or no fines. MH plasticity, groveily clays, sandy <br /> SAND Poorly-graded sands or gravelly SILTS clays, lean days <br /> AND SP sand mixture, little or no fines AND inorganic days of high plasticity, <br /> SANDY CLAYS CH fat clays <br /> 1 SOILS su Silty sands, sand—silt mixtures LL >50 OH Organic days of medium to high <br /> plasticity <br /> SC Clayey sands, sand—silt mixtures HIGHLY <br /> ORGANIC PT Peot and other highly organic sails <br /> SOILI ❑ Sand pack <br /> Depth through which <br /> sampler is driven <br /> ■ Bentonite annular seal <br /> iRelatively undisturbed sample <br /> ❑ Neat cement annular sea! <br /> 1< Missed sample <br /> ❑� Ground water level Blank PVC <br /> observed in boring <br /> © Machine—slotted PVC <br /> S-10 Sample number <br /> PVC Centralizer <br /> PID Photoionization detector reading <br /> BLOW/FT REPRESENTS THE NUMBER OF BLOWS OF A <br /> 140—POUND HAMMER FALLING 30 INCHES TO DRIVE <br /> THE SAMPLER THROUGH THE LAST 12 INCHES OF AN <br /> 18 INCH PENETRATION <br /> DASHED LINES SEPARATING UNITS OF THE LOG <br /> REPRESENT APPROXIMATE BOUNDARIES ONLY <br /> ACTUAL BOUNDARIES MAY BE GRADUAL LOGS <br /> REPRESENT SUBSURFACE CONDITIONS IN THE <br /> BORING AT THE T1ME OF DRILLING ONLY <br /> = "—_--_ UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> - - i AND SYMBOL KEY <br /> ARCO Service Station No. 2076 A�1 <br /> Flt£ NO 800 Eas! Kettlemen Lane <br /> PROJECT NO. 30008 0008E IA Lodi, California <br />