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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> Major Division Ltr Description Mayor Division Ltr Description <br /> Well graded CraysEs or Irwrganie Silts and very <br /> GW Gravel—Sand mixtures, fine Sands rock flour <br /> little or no firms WL Silty or Clayey fine Sands <br /> Of Clayey Silts with skgh; <br /> plasticity <br /> Poorly—graded Gravels or Silts {no a ty. C <br /> GP Gravel-Sand mixtures, rQ krys of low to <br /> Grovel little or no fines and CL medium plasticity Gravelly <br /> and Clays <br /> C�, Sandy Cla Silty <br /> Gravelly LLG50 c <br /> SOBS cm Silty Gravels Grovel—Sond— <br /> Silt mixtures <br /> OL organic Silty and Organic <br /> Fine-- <br /> Silt—Goys of low plasticity <br /> Coarse— GC Clayey Grove{, Gravel—Sane— Grained <br /> Grained clay mixtures <br /> $aIIS inorganic Sits mieoeevua <br /> Soils or diotomaceous fine <br /> MH Sandy or Silty soils <br /> Well—graded Sand or elastic Silts <br /> SW Gravelly Sands, little or <br /> no fines Silts <br /> and inorganic Clays of high <br /> Sand Poorly—graded Sande or and <br /> CH piasticity fat Gaya <br /> SP Gravelly Sands little or LD50 <br /> and no fines <br /> Sandyso <br /> Soils Organic CI of medium <br /> Sm Silty Sands, Sand—Silt OH t high plasticity o;.nic <br /> mixtures Silts <br /> SIC Clayey Sands, Sand—Clayk <br /> Peat and other hi <br /> mixtures Orrganigani c highly <br /> SOUS organic soils <br /> WELL CONSTRUCTION SYMBOLS <br /> IDepth through which <br /> sampler is driven Neat cement <br /> Relatively undisturbed � <br /> sample Sand pack <br /> ■ (Monterey Sand #3) <br /> No sample recovered <br /> ■ Bentonite <br /> Static water level <br /> observed in well/boring � Blank PVC � <br /> y Initial water level <br /> observed In well/boring <br /> S-14 Sample number LM Machine—slotted PVC <br /> Note Blows represent the number of blows of a 140—pound hammer <br /> falling 30 inches to drive the sampler through each <br /> 6 inches of an 18—inch penetration <br /> Dashed lines separating formations on the log represent approximate <br /> boundaries only Actual boundaries may be gradual Logs represent <br /> subsurface conditions at the boring location at the time of dnlling only <br /> _HORIZON ENVIRONMENTAL INC. BORNG LOG SYMBOL KEY <br />