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I PRIMARY DNISIONS SOIL <br /> YPE LEGEND SECON!' '`Y DIVISIONS <br /> CLEAN GW °°a°° 'Well graded.. ravels, <br /> GRAVELS GRAVELS o 0 ° g g gravelspnd mixtures,. little or no #Ines <br /> (Less than ,.10 jr. " . <br /> p MORE THAN HALF 5�-Fines). GP �:�*-'!•. Poorly graded gravels or grovel--.sand mixtures, little or no fines <br /> 0 Sieg OF COARSE FR4C71oN <br /> IS LARGER THAN <br /> 4 Z W No. 4 SIEVE GRAVEL GM Silty. gravels, gravel--sand-silt mixtures, plastic fines <br /> LLJ WITH <br /> Z N <br /> 9 FINES GC Clayey gravels, gravel—sand—clay mixtures, plastic"fines <br /> CLEAN <br /> uJ � SANDS SW <br /> Well graded."sands, gravelly sands, little or no fines <br /> V) , SANDS (Less than <br /> 0-, MORE THAN 'HALF 57. Fines) SP Poorly graded sands.-or gravelly sands,' little or no fines <br /> OF COARSE FRACTION <br /> U IS No LER THAN SANDS SM Silty sands, sand-silt—mixtures, non-plastic fines <br /> WITH <br /> FINES SC. " -Clayey,sands, sand—clay mixtures, plastic fines <br /> jcn ML Inorganic silts and very fine sands, rock flour, silty or. clayey fine <br /> sands or clayey silts with slight plasticity <br /> O n SILTS AND CLAYS. Inorganic clays low to "medium plasticity, <br /> N §d CL. p y, gravelly clays, sandy <br /> LL=w LIQUID CIMIT IS LESS THAN 50 7L clays, silt plays, lean._Clays <br /> Lein OL Organic silts and organic silty -clays.of low plasticity <br /> z <br /> X MHlnorganic silts, micaceous or diatomaceous.fine sandy or-silty <br /> soils; elastic silts <br /> SILTS AND`CLAYS." <br /> aW� LIQUID LMfr IS GREATER THAN 5D CH Inorganic clays "of, high' plasticity, fat clays <br /> o— <br /> OH "�� �" Organic" clays of medium to high plasticity, organic silts" <br /> HIGHLY:ORGANIC SOILS PT . Peat"and other highly,organic soils. <br /> a <br /> DEFINITION :OF TERMS <br /> I� <br /> LI <br /> U:S. STANDARD"SIEVE SIZE CLEAR SQUARE SIEVE 'OPENING S <br />` 200 40 10 4 3/4" 3" 12" <br /> ] .SAND" GRAVEL <br /> SILTS AND CiAY COBBLES BOULDERS <br /> 'FINE -MEDIUM" -COARSE FINE COARSE <br /> I r GRAIN SIZES <br /> TERZAGHI D & :M <br /> y SPLIT SPOON; STANDARD MODIFIED CALIFORNIA UNDERWATER PISTON-SAMPLER <br /> �# ® PENETRATION TEST" (SPT) �. SAMPLER <br /> I U <br /> SAMPLERS <br /> f <br /> I AT TIME 'OF DRILLING MEASURED FOLLOWING DRILLING <br /> GROUND WATER - <br /> SAND <br /> ATER "SAND AND GRAVEL BLOWS/FOOT*- SILTS AND CLAYS , STRENGTH+ BLOWS/FOOT* <br /> VERY' LOOSE 074 VERY SOFT 0=1/4 0=2 <br /> LOOSE 4-10 SOFT 1/4-1/2 2-4 <br /> MEDIUM -DENSE 10-30 ..MEDIUM STIFF 1/2-1 4-8 <br /> DENSE 30=50. ' STIFF z '1-2 . 8-16 <br /> VERY DENSE OVER 50- VERY, STIFF. 2-4 1"6-32 <br /> HARD OVER 4 OVER_32 <br /> RELATIVE :DENSITY CONSISTENCY <br /> *Applicable only for Standard Penetration Tests'(ASTMI D-1586). <br /> +Unconfined compressive strength .in tons/sq.ft. ,as-del) <br /> s-determined "by laboratory testing or approximated by the standard penetration <br /> test {ASTM 0-1586), :pocket penetrometer, torvane, or visual observation. <br /> "KEYTO EXPLORATORY- BORING -LOGS <br /> i Unified Soil Classification System (ASTM D•--2487) <br /> L <br /> LL0"EVASSOCIATES FIGURE A <br /> mental/Geotechnical/Engineering Services <br />