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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISION LTR DESCRIPTION MAJOR DIVISION LTR DESCRIPTION <br /> Well—graded grovels or Inorganic silts and very <br /> fine sands. rock flour, <br /> ML <br /> GW gravel—sand mixtures, silty or clayey fine sands, <br /> little or no fines. or clayey silts with slight <br /> GRAVELPoorly—graded gravels or <br /> SILTS plasticity. <br /> AND GP gravel—sand mixtures, AND Inorganic clays of low to <br /> GRAVELLY little or no fines. CLAYS GL medium plasticity, gravelly <br /> SOILSLL<50 clays, sandy clays, silty <br /> GM Silty gravels, gravel—sand— clays, lean clays. <br /> silt mixtures. <br /> GG Clayey gravel, grovel—sand OL Organic silts and organic <br /> —cloy mixtures. sill—clays of low plasticity. <br /> COARSE— FINE— <br /> GRAINED Well—graded sand or GRAINED Inorganic sills. micaceous <br /> SOILS SOILS <br /> S1Af gravelly Bonds, little ar MH or diatomaceous fine <br /> no fines. sandy or silly soils, <br /> SAND SILTS elastic sills. <br /> ANDPoorly—graded sands or AND Inorganic clays of high <br /> SANDY SP gravelly sands, little or CLAYS CH plasticity, fat clays. <br /> SOILS no fines. LL>50 <br /> Organic clays of medium <br /> SM Silty sands, sand—sill OH to high plasticity, organic <br /> mixtures. silts. <br /> Clayey sands, sand—clay HIGHLY ORGANIC SOILS PT Peat and other highly <br /> SG Y Y organic soils. <br /> mixtures. <br /> I Depth through which Sand pack <br /> sampler is driven <br /> ■ Stratigraphic contact <br /> Bentonite <br /> T Sample analyzed by <br /> i laboratory <br /> o Neat cement <br /> No sample recovered ® _ <br /> Caved native soil Gradational contact <br /> Static water level <br /> observed in well/boring ❑ <br /> Blank PVC <br /> p Initial water level <br /> observed in boring <br /> Machine—slotted PVC <br /> S-10 Sample number — <br /> co <br /> P.I.D. Photoionization detector Pea grovel Inferred conct <br /> BLOWS REPRESENT THE NUMBER OF BLOWS OF A 140—POUND HAMMER <br /> FALLING 30 INCHES TO DRIVE THE SAMPLER THROUGH EACH 6 INCHES <br /> OF AN 18—INCH PENETRATION. <br /> GRADATIONAL AND INFERRED CONTACT LINES SEPARATING UNITS ON THE <br /> LOG REPRESENT APPROXIMATE BOUNDARIES ONLY. ACTUAL BOUNDARIES <br /> MAY BE GRADUAL. LOGS REPRESENT SUBSURFACE CONDITIONS AT THE <br /> BORING LOCATION AT THE TIME OF DRILLING ONLY. <br /> UNIFIED SOIL CLASSIFICATION SYSTEM <br /> R-_AW�/AR AND SYMBOL KEY <br /> Z--AN�7 ROEK BROTHERS PROPERTY <br /> 102 SOUTH WILSON WAY <br /> PROJECT 150108.01 STOCKTON, CALIFORNIA <br />