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(/) <br />_J <br />6 <br />(/) <br />0 w z <br /><t: <br />0::: <br />(.J <br />w <br />(/) <br />0::: <br /><( <br />0 u <br />(/) <br />_J <br />6 <br />(/) <br />0 w z <br /><t: <br />0::: <br />(.J <br />w z <br />G: <br />[I] <br />PRIMARY DIVISIONS SOIL LEGEND SECONDARY DIVISIONS TYPE <br />CLEAN -,() o:::~: <br />GW 0 0 o · Well graded grovels, gravel-sand mixtures, little ar na fines GRAVELS .a::. :o:. :,:~. <br />GRAVELS (Less than ~:r;tt ;;I_ GP Poorly graded gravels or gravel-sand mixtures, little or no fines MORE THAN HALF 57. Fines) o'o OF COARSE FRACTION wo <br />11' I-N IS I.J\RGER THAN GRAVEL GM /all Silty grovels, grovel-sand-silt mixtures, plastic fines ~c:i NO. 4 SIEVE ~ , <br />i._Z WITH ,.,-.2 ,,.~ oz FINES GC Clayey gravels, grovel-sand-cloy mixtures, plastic f ines i..< -~ .,,. .. JJ:: 11- <br />CLEAN : .. a: SW We ll graded sands, gravelly sands, little or no fines zw SANDS .. <br /><" __ ,, <br />:r"' SANDS (Less tha n .. <br />1-.:5 SP " Poorly graded sands or gravelly sands, little or no fines ~~ 5% Fi nes) MORE THAN HALF .. 0 OF COARSE FRACTION ::a IS SMAUER THAN SANDS SM <br />,. -··· Silty sands, sand-silt-mixtu res, non-plastic fines NO. 4 SIEVE WITH .. .. ·,_ <br />FINES SC Vy; Clayey sands, sand-cloy mixtures, plastic fines ./ <br />ML I Inorganic silts and very fine sands, rock flour, silty or clayey f ine ....I sands or clayey silts with slight plasticity ~o <br />"'o SILTS AND CLAYS l;!:'N Inorgani c cloys of low to medium p lasticity, gravelly cloys, sandy <. CL V/// cloys, silty clays , lean c loys :::ao LIQUID LIMIT IS LESS THAN 50 7. .._z w I I 11 1 Organic silts and organic silty c lays plasticity OzN OL of low ~~iii I I < ... '-' I <br />i <br />Inorganic silts, micoceous or diotomaceous fine sandy or silty :r a:i;; MH z~ui soils, elastic silts 1-;;1_ SILTS AND CLAYS v~ ... :> CH Inorganic c loys of high plastici ty, tot c l oys W Vl LIQUID LIMIT IS GREATER THAN 50 7. a: Vl v~;:/ o-:> OH Organic cloys of medium to high plasticity, organic silts / / /, <br />PT <br />l l I I I HIGHLY ORGANIC SOILS ,-l I l I l Peat and other highly organic soils <br />DEFINITION OF TERMS <br />U.S. STANDARD SIEVE SIZE CLEAR SQUARE SIEVE OPENINGS <br />SILTS AND CLAY <br />TERZAGHI <br />SPLIT SPOON <br />200 <br />STANDARD PENETRATION <br />FINE <br />40 10 <br />SAND <br />I MEDIUM I <br />GRAIN SIZES <br />0 MODIFIED CALIFORNIA <br />SAMPLERS <br />COARSE <br />[rn <br />4 3/4" <br />GRAVEL <br />FINE <br />D & M <br />UNDERWATER <br />SAMPLER <br />I COARSE <br />3" 12'' <br />COBBLES BOULDERS <br />[i] PISTON SAMPLER <br />'¥, AT TIME OF DRILLING ! MEASURED FOLLOWING DRILLING <br />GROUND WATER <br />SAND AND GRAVEL BLOWS/FOOT• SILTS AND CLAYS STRENGTH+ BLOWS/FOOT• <br />VERY LOOSE 0-4 <br />LOOSE 4 -10 <br />MEDIUM DENSE 10-30 <br />VERY SOFT 0 -1/4 0-2 <br />SOFT 1/4-1/2 2 -4 <br />MEDIUM STIFF 1/2-1 4 -8 <br />DENSE 30-50 STIFF 1-2 8-16 <br />VERY DENSE OVER 50 VERY STIFF 2-4 16-32 <br />HARD OVER 4 OVER 32 <br />RELATIVE DENSITY CONSISTENCY <br />•Number of blows of 140 pound hammer foiling 30 inches to drive o 2 -inch 0 .0. (1-3/8 inch 1.0.) split spoon (AS TM 0-1586). <br />+Unconfined com press ive strength in tons/sq.ft. as determined by laboratory testing or approximated by the standard penetration <br />test (ASTM 0-1586), pocket penetrometer, torvone , or visual observation . <br />KEY TO EXPLORATORY BORING LOGS <br />Unified Soil Classification System (ASTM D-2487) <br />LOWNEY ASSOCIATES <br />Environmentol/Geotechnicol/Engineering Services FIGURE A-1