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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAiOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR OESCRIRTION <br /> Wall—graded gravels Of gravel and -.pry. lic sits and vary ill Val <br /> Gel sand mixtures. Ill or no fines. ML rock flour, silty or c" fine <br /> SILLS sands or clayey silts <br /> peony—graded gravels or gravel AND lasticiN. <br /> CRi CP sand mixture, little or na fines. <br /> AND CLAYS InorgInorganicclays or low is medium <br /> CRAVELL'f Silty gravels, gravel—sand—Silt LL <50 CL plasticity, gravelly clays, sandy <br /> 2� <br /> SOB C►1 mixtures. clays, lean clays. <br /> Clayey grovels, gravel—sand—clay OL Organic silts and organic silt—clays <br /> COARSE CC midures. FINE: of law plasticity. <br /> GRAINED GRAYNESS Inorganic clays or low to medium <br /> SOILS SW Wall—graded sonde or gravelly SOILS <br /> sands, little or no fines, MH plasticity, gravelly days, sandy <br /> SAND Poor) raded sands or gravelly SILTS clays, Iecn clays. <br /> AND SP sand mixture, little ar no fines. AND Inoi;; clays al high plasticity, <br /> SANDY CLAYS OH fat cloys. <br /> f_ SOILS Su Silty Sandy, sand—silt mixtures. LL n50 d <br /> OH Organic ays of medium to high <br /> plasticity. - <br /> Sc Clayey sands, sand—silt mixtures. MCHLSD+�GANIC PT Peot and other highly organic Boils, <br /> ay Sand pack <br /> Depth through which <br /> sampler is driven. <br /> Bentonite annular seal <br /> 2 Relatively undisturbed sample <br /> e� 1� � Neat cement annular seal <br /> AJ Missed sample <br /> ❑ Blank PVC <br /> ® Ground water level <br /> = observed in boring <br /> Machine--slotted PVC <br /> S-10 Sample number <br /> PVC Centralizer <br /> PID Photoionization detector reading <br /> BLOW/FT REPRESENTS ?HE 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 CLASSIRCATiON SYSTEM PLATE <br /> AND SYMBOL KEY <br /> ,sprr.d a.esr�+ ARCO Service Station Pio. 6020 p-3 <br /> i7il Yoserail a Avenue <br /> PROJECT NO. 30035-1 Manteca, California <br />