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, � e <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION <br /> GW Well-graded gravels or gravel and Inorganic alto 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 /> CRAWL CP plasticity <br /> AND sand mixture, little or no fines AND <br /> GRAVELLY Silty grovels. grovel-9and—Sllt CLAYS Inorganic clays or low to medium <br /> mixtures LL <50 CL plasticity, gravelly clays, eandy <br /> clays, lean days <br /> COARSE Cc Clayey gravels, gravel-sand—ciay Organic silts and organic sat—clays <br /> GRAINED mixtures FINE OL of low plasticity <br /> SOILS Well—graded sands or groveil GRAINED In <br /> � y organic clays or low to mednrm <br /> sands little or no fines SOILS MH plasticity, gravelly clays, sandy <br /> SAND Pood raded sands or clays' lean days <br /> = AND SP Y—g gravelly SILTS <br /> sand mixture, little or no fines AND Inorganic clays of high plasticity, <br /> SANDY CLAYS CH fat cloys <br /> SOILS 5M Silty sands, sand—silt mixtures LL X50 Organic clays of medium to high <br /> OH <br /> plasticity <br /> SC Clayey sands, sand—silt mixtures HIGHLY ORGANICSOILS PT I peat and other highly organic sails <br /> F-1 Sand pack <br /> Depth through which <br /> sampler is driven <br /> ■ Bentonite annular seal <br /> iRelatively undisturbed sample <br /> Neat cement annular seal <br /> Missed sample <br /> F-1 Blank PVC <br /> rr Ground water level <br /> observed In boring <br /> Machine—slotted PVC <br /> 5-10 Sample number <br /> PVC Centralizer <br /> PID Photolanizatlon 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 /> --- i=s=!� SYMBOL Comp KEY <br /> Flre Engine Company No. 2 3 <br /> FILE NO 110 West Sonora Street <br /> PROJECT NO. 38009 B009E1IA I Stockton, California <br />