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UNIFIED SOIL CLASSIFICATION SYSTEM MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION GW Well-graded gravels or gravel and Inorganic silts and very fine sands, sand mixtures little or no fines Mi- rock flour silty or clayey fine Poorly-graded gravels or grovel SILTS sands or clayey stats with slight GRAVEL CIDsand mixture, little or no fines AND Plastica AND GRAVELLY Silty gravels gravel-sand-silt CLAYS Inorganic clays or low to medium SOILS GM mixtures LL <50 CL plaasticity, gravelly ravel y clays, sandy COARSE GG Clayey grovels gravel-sand-clay Organic silts and organic silt-clays GRAINED mixtures RNE OL of low Plasticity SOILS SW Well-graded sands or gravelly GRAINED Inorganic clays or low to medium sands little or no fines SOILS MH plasticity groveily clays, sandy SANDSP Poorly-graded sands or gravelly SILTS cEoye, lean days AND sand mixture little or no fines AND Inorganic clays of high plasticity, SANDY CLAYS CH fat clays SOILS sM Silty sands sand-silt mixtures LL >50 OH Organic clays of medium to high plasticity SC Clayey sands sand-silt mixtures HIGHLY ORGANIC PT Peat and other highly organic soils SOILS ❑ Sand pack Depth through which sampler is driven ■ Bentonite annular seal Relatively undisturbed sample Missed sample F-1 Neat cement annular seat� ❑ Blank PVC T Ground water level observed In boring Machine—slotted PVC S-10 Sample number PVC Centralizer PID Pho#olonlzatlon detector reading BLOW/FT REPRESENTS THE NUMBED, OF BLOWS OF A 140—POUND HAMMER FALLING 30 INCHES TO DRIVE THE SAMPLER THROUGH THE LAST 12 INCHES OF AN 18 INCH PENETRATION DASHED LINES SEPARATING UNITS OF THE LOG REPRESENT APPROXIMATE BOUNDARIES ONLY ACTUAL BOUNDARIES MAY BE GRADUAL LOGS REPRESENT SUBSURFACE CONDITIONS IN THE BORING AT THE TIME OF DRILLING ONLY �--_-_ UNIFIED SOIL. CLASSIFICATION SYSTEM PLATE i=!=�E AND SYMBOL KEY Fre Eosins Company No. 2 FLE NO 110 West Sonora Street PROTECT NO. 38009 8009Ell A Stockton, California