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t <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION <br /> Well—graded gravels or gravel and Inorganic silts and very fine sands, <br /> Gw sand mixtures little or no fines ML rock flour silty or clayey fine <br /> Poorly—graded gravels or gravel SILTS sands or clayey nits with slight <br /> GRAVEL GP 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 /> SOILS GM mixtures clays lean clays <br /> Clayey grovels, gravel—sond—clay Organic silts and organic silt—clays <br /> COARSE <br /> INED GC mixtures FINE OL of low plasticity <br /> GRAINED <br /> SOILS Well—graded sands or gravelly SOILS Inorganic clays or low to medium <br /> Sw sands little or no Fines MH piasticity, gravelly clays, sandy <br /> SAND Poorly—graded sands or gravelly SILTS clays lean clays <br /> AND SP sand mixture little or no fines AND Inorganic clays of high plasticity <br /> SANDY CLAYS CH fat clays <br /> SOILS SQA Silty sands, sand—silt mixtures LL >50 OH Organic clays of medium to high <br /> plasticity <br /> ISCCla a sands, sond—silt mixtures HIGHLY ORGANIC <br /> y y SOILS PT Peat and other highly organic sails <br /> ❑ Sand pack <br /> Depth through which <br /> sampler is driven <br /> ■ Bentonite annular seal <br /> i Relatively undisturbed sample <br /> TT ❑ Neat cement annular seal <br /> . XC Missed sample <br /> F-1 Blank PVC <br /> 0 Ground water level <br /> observed In boring <br /> EjMachine—slotted PVC <br /> 5-10 Sample number <br /> PVC Centralizer <br /> PID Photolonlzotlon 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 TIME OF DRILLING ONLY <br /> UNIFIED SOIL CLASSIFICATION SYSTEM PLATE <br /> ANEW .....�—� AND SYMBOL KEY <br /> i-1ArwArms ARCO Service Station No. 2130 C1 <br /> FILE No 7906 North Ell Dorado Street <br /> PROJECT NO. 30003-4 0003DBA Stockton, California <br />