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I UNIFIED SOIL CLASSIFICATION SYSTEM p� MAJOR DIVISIONS LTR DESCRIPMON MAJOR DIVISIONS LTR DESCRIPTION Gyi Well—groded 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 GRAVEL CP sand mixture little or no fines AND Plost c=t AND GRAVELLY Silty gravels gravel—sand—silt CLAYS Inorganic clays or low to medsum LL <50 GL lay , gravelly clays sandy SOILS GM mixtures cle clays lean days COARSE Clayey gravels gravel—sand—clay Organic wits and organic silt—days GRAINED mixtures FINE GL of lo+s plasticity SOILS Well--graded sands or gravelly GRAINED Inorganic clays or low to medium SW sands, little or no fines SOILS NH piastt city, gravelly clays, sandy SAND Paan raded sands or clays lean days AND SP Y-9 gravelly SILTS Bond mixture, little or no fines AND Inorganic clays of high plasticity SANDY CLAYS CH Fat cloys SOILS SM Silty sands sand—silt mixtures LL >50 OH organic clays of medium to high plasticity SC Clayey sands, sand—silt mixtures HIGH OS GAMIC SOI PT peat and other highly organic soils i Sand pack T Depth through which I sampler is driven Bentonite annular seal iRelatively undisturbed sample ❑ Neat cement annular sea# Missed sample ❑p Ground water level Blank PVC observed in boring Machine—slotted PVC 5-10 Sample number PID Photoionlzatlon detector readingPVC 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 ""Ali UNIFIED SOIL CLASSIFICATION SYSTEM PLATE AND SYMBOL KEY RUIZ Grocery Stare FILE ND 4499 West Durham Ferry Road 3 PROJECT NO. 123020 302aA4A Tracy, California