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UNIFIED SOIL CLASSIFICATION SYSTEM <br /> M^'JOR DIVISIONS LTR DESCRIPTION MAJOR DIVISIONS LTR DESCRIPTION <br /> GV Vell- radad pravols a• gravel and <br /> sand nixtvex, little or no f nm Irsorganlc slits and very floe sands, <br /> HL roc3c flow;,pity or dayry Fine <br /> GRavi3 Gp Poorly-graded gravels or gravel SULTS sands or clayey SAts nth slight <br /> AND <br /> sand rexttme, -Ue or no firm AN'. last <br /> ® MAVEI.LY Silt), 8ravrls, gravel-sand-sat CLAYS InDr QQ= clays or los to nechim <br /> S raxttu rs LL (50 CL Pit=, =tY ctayz sandy <br /> CaARSE DC Cl y yew avr[s, gravel-sand-ctoy Or"c slits and Organic sit-clays <br /> GRAINED ntxtur FINE <br /> of lar Ptastictky. <br /> SGILS gy Vell-gr•aded sandszt— <br /> SE"LS <br /> ly GRAINE2NED Inorrgqanic cloys or ins to nedlun <br /> scalds, ltttir or nn { PlastlCty, gravelly clays, sandy <br /> SAND Sp poprly.Q'nded san , velly SILTS cloys Iron clays <br /> ANDYAND sand ruxturv, littles. AND In <br /> SH CLAYS . CH fate clays of h1r,h. Plasticity, <br /> Silty sandz6 sand- s. LL >50 OH OrDame clays of nedhm to high <br /> Plastwty. <br /> Clayey sandx sandrs HIGH GAtIIC <br /> PT Peat and other highly organic salts, <br /> ® Sand pack <br /> Depth through which <br /> T sampler !s driven, <br /> Bentonl•'re annular seal <br /> Relatively undisturbed sample <br /> Messed sample Neat cement annular seal <br /> Blank PVC <br /> ® V Ground water level <br /> observed In boring <br /> © Machtne-slotted PVC <br /> S--10 Sample number <br /> PID Photolonlzatlon detector reading PVC Centralizer <br /> BLOW/FT REPRESENTS THE NUMBER OF BLOWS OF A <br /> 140-POUND HAMMER FALLING 30 INCHES TO DRIVE <br /> TH;: 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 CLASSIFICATION SYSTEM PLATE <br /> AND SYMBOL KEY <br /> PIIPd .-. . ASCO Sorriee Station AIa. BiOQ Pad <br /> LPRO=JECTNO. 30041-1 25776 South Patterson Pass <br /> Tracy, California <br />