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UNIFIED SOIL CLASSIFICATION S STEM MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION GW Well—graded gravels or grovel and Inorganic slits and very true sands sand mrxtures little or no fines ML rock flour silty or clayey fine GRAVEL GP Poorly—graded gravels or gravel SILTS sands or clayey slits with slight AND sand mixture little or no fines AND Plasticity GRAVELLYSilty groveis gravel—sand—silt CLAY5 inorganic clays or low to medium SOILS GM mixtures LL <$D CL Plasticity groveily cloys sandy clays lean clays COARSE GC Cioyey gravels grovel—sand—clay Organic silts and orgarnc silt—clays GRAINED mixtures FINE OL of low piast c ty SOILS SW Weft—graded sands or gravelly GRAINED SOILS Inorganic clays or low to eo um sands Mile or no fines m MH Plasticity gravelly cloys sandy SAND PoclO raded sands or ravelk cl❑ s lean ala s AN SP y—g 9 Y SIDS y Y L—In SOnd mixture little or no Fines AND Inorganic .lays of hign N asttuty CLAYS CH fat days Sdty sands sand—slIt mixtures LL X50OrganiL c ays or rn ClUrtl to hign Plast c ty Clayey sands sand—sit mixtures HIGHLY ORGANIC SOILS PT Peat and other highly organic soils i T Depth through which Sona pack I sampler Is driven Rentcnite annular seal Relatively undisturbed sample TG Missed sample ❑ Neat cement annular Seal � ❑� Ground water level Blank PVC observed In boring Mach r}e—slotEzd rVC S- 10 Sample number �= PID Phototonlzatlon detector reading PVC { entrallzer BLOW/FT REPRESENTS ThE NUMBER OF BLOWS OF 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 1 HE LUT- REPRESENT APPROXIMATE BOUNDARIES ONLr ACTUAL BOUNDARIES MAY BE GRADUAL LOGS REPRESENT SUBSURFACE CONDITIONS IN THE BORING AT THE TIME OF DRILLING ONLY UNIFIED SOIL CLASSIFICATION Y "4"AL/�, SYSTEM PLATE t�=t�� AND SYMBOL KEY ARCO Service Station No. 2168 PROJECT NO. 31009 FILE NO 441 West Charter Way +1 2oosD3A Stockton, California