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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 ML rock flour silty or clayey fine Poorly--graded gravels or gravel SILTS Sands or clayey silts with slight CRAWL GP sand mixture little or no fines AND plasticity A GRAVELLY CLAYS Inorganic clays or,low to medium Silty gravels, gravel—sand—silt LL [50 CL plasticity gravelly Clays sandy SOILS GM mixtures clays lean days Clayey gravels gravel—sand—clay Organic silts and argonic silt—clays COARSE GRAINED GC mixtures RNE OL of low Plasticoty GRAINED SOILS SW Well—graded sands or gravelly SOILS Inorganic clays or low to medium sands, little or no fines MH plasticity, gravelly clays, sandy SAND Poorly—graded sands or gravelly SILTS clays lean days AND SP 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 cloys of medium to high plasticity SC Clayey sands sand—silt mixtures HIGHLY ORGANIC PT SOILS Peat and other highly organic soils ❑ Sand pack Depth through which sampier Is driven ■ Bentonite annular seal l TC1 Relatively undisturbed sample ❑ Neat cement annular seal Missed sample I � Blank PVC V Ground water level observed In baring Machine—slotted PVC S-10 Sample number PID Photolonlzatlon detector reading i> PVC Centralizer BLOW/FT REPRESENTS THE NUMBER 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 AND SYMBOL KEY ARCO Service Station No. 760 FILE N0 225 South Cherokee Lane 3 PROJECT NO. 38048 uses Lodi, California