Laserfiche WebLink
UNIFIED SOIL CLASSIFICATION SYSTEM <br /> MAJOR DIVISIONS SYMBOLS CODE TYPICAL NAMES <br /> ° 4 <br /> GW 6 ° Well graded gravels or gravel - sand mixtures Irttle or no fines <br /> GRAVELS <br /> J GP 6 0 4 o Poorly graded gravels or gravel - sand mixtures little or no fines <br /> o w <br /> 'Z' (More than 1/2 of <br />' 0 u, coarse fraction > GM Silty gravels gravel - sand - silt mixtures <br /> d �° > no 4 sieve size) <br /> H \ N GC Clayey gravels gravel - sand - clay mixtures <br /> < <br /> Of t o SW - ' -'' Well graded sands or gravelly sands little or no fines <br /> W " `� SANDS <br /> ul a °� °c SP Poorly graded sands or gravelly sands little or no fines <br /> a o (More than 1/2 of <br /> " ^ coarse fraction < SM Silty sands sand - silt mixtures <br /> no 4 sieve size) <br /> SC Clayey sands sand - clay mixtures <br /> ML Inorganic silts and very fine sands rock flour silty or clayey <br /> SILTS & CLAYS fine sands or clayey silts with slight plasticity <br /> I J 0 13 Inorganic clays of tow to medium plasticity gravelly clays <br /> o Z m CL sandy clays slaty clays lean clays <br /> yam LL < 50 <br /> a C'4 OL Organic silts and organic silty clays of low plasticity <br /> I < o 0 1 i i r r r r r r 1 r i Inorganic silts micaceous or diatomaceous fine sandy <br /> SILTS & CLAYS MH r l i r r l l r l l r l or silty sols elastic sits <br /> w o <br /> o CH Inorganic clays of high plasticity fat clays <br /> V LL ->--50 <br /> �������� Organic clays of medium to high plasticity organic <br /> OH <br /> .. silty clays organic silts <br /> .�...� siY Y <br /> HIGHLY ORGANIC SOILS Pt —- -—- Peat and other highly organic soils <br /> CONSISTENCY CLASSIFICATION GRAIN SIZE CLASSIFICATION <br /> ICOHESIVE SOILS GRANULAR SOILS CLASSIFICATION RANGE OF GRAIN SI2ES <br /> Description Blows/ft' Description Blows/ft' U S Standard Grain Size <br /> Very Soft < 3 Very Loose < 5 Sieve size n Mdi:meters <br /> Soft 3 5 Loose 5 - 15 <br /> BOULDERS Above 12" Above 305 <br /> - <br /> Medium (firm) 6 - 10 Medium Dense 16 - 40 COBBLES 12 to 3" 305 to 76 2 <br /> Stiff 11 - 20 Dense 41 - 65 GRAVEL 3" to No 4 76 2 to 4 76 <br /> Very Stiff 21 - 40 Very Dense > 65 coarse (c) 3" to 3/4" 76 2 to 141 <br /> fine (f) 3/4 to No 4 lgl to 476 <br /> Hard > 40 <br /> *Blows/ft-lower I 12 inch interval of drive or as noted SAND No 4 to No 200 476 to 0074 140 lb hammer 30 drop California Sampler coarse (c) No 4 to No 10 4 76 to 2 00 <br /> medium (m) No 10 to No 40 2 00 to 0 420 <br /> OTHER SYMBOLS fine (f) No 40 to No 200 0420 to 0074 <br /> I SILT & CLAY Below No 200 Below 0 074 <br /> Q = Sod Sample <br /> = Initial Water Level <br /> =f= Fmcl Water Level <br /> — — —= Estimated or gradational material <br /> I change line <br /> = Observed material change line <br /> I <br /> SOIL CLASSIFICATION CHARTS WKA NO 2556 01 <br /> 26485 THORNTON ROAD DATE 12/93 <br /> WALLACE - KUHL & ASSOCIATES, INC <br /> GEOTECHNICAL ENOINEERINO San Joaquin County, California PLATE NO 6 <br /> GEOLOGIC & ENVIRONMENTAL SERVICES <br />