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' UNIFIED 1901L CLASSIFICATION SYSTEM <br /> Mayor Division Ur Description Mayor Division Ur. Description <br /> Well—g roded Gravels or Inorganic Silts and wry <br /> ow G+nre(—� m�u�. fine Sands. rock flour <br /> little or no tinea All. Silty or Clayey fin. Sands. <br /> or Ckrrey Sifts with alight <br /> Pb�dY <br /> Poory—Qrpd.d crawls or Silts I ante clays of low to <br /> Grovel CP l�or nooCfmp rq' and CL medium plasticity, Gravelly <br /> and Clays Cloys. Sandy Ckrys, Silty <br /> Gravelly LL<50 Clays. L"an Clays <br /> Soils GM 5dty Grovels. Gravel—Sand— <br /> Silt mixtures <br /> Ole Organic Silty and Organic <br /> Fine-- Silt—Clays of low plasticity <br /> Coarse— GC Clayey Growl, crawl—Sand— Grained <br /> Grained Clay mixture. <br /> SOIIS 1 arnc 51ta, micaceous <br /> Soils or diatorn4mmus fine <br /> Sondy or Silty soils <br /> Well—graded Sand or elaatfc Sits <br /> SWGravelly Sande. little or <br /> no fins Silts <br /> and Ino anic Clays of high <br /> Sand Po"--graded Sands or Clays pla,1lcity, fat cloys <br />' SP Gravelly Sands, little or LL>50 <br /> and no fines <br /> Sandy Organic Clays of msdium <br /> Soils Silty Sands, Sand—SlIt I.Sifts Igh plosticity organic <br /> SU mixturq <br /> Highly <br /> SC m�roo'�:. sand—clay Organic organic�solother highly <br /> Soils `g <br /> WELL CONSTRUCTION SYMBOLS <br /> IDepth through which + <br /> sampler is driven Neat cement <br /> Zea <br /> Sample ly undisturbed Sand pack <br /> Sample � (Monterey Sand X13) <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-10 Sample number 11R] Machine—slotted PVC <br />' Note Blows represent the number of blows of a 140—pound hammer <br /> rolling 30 Inches to drive the sampler through each <br /> 6 inches of an 18—Inch penetration <br />' Dashed fines 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 drilling only <br /> HORIZON ENVIRONMENTAL INC. BORWO LOG SYMBOL KEY <br />