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�- UNIFIED SOIL CLASSIFICATION SYSTEM <br /> 4` MAJOR DIVISIONS SYMBOLS CODE TYPICAL 'NAMES <br /> GW Well groded'grovels or gravel -,sand mixtures, little or no fines <br /> GRAVELS <br /> U) GP' Q O 100 Poorly graded gravels or gravel - sand mixtures, little or-no fines <br /> l om (More than 1/2 of 6 4 <br /> 00 0 'm coarse fraction > GM Silty grovels, gravel,- sand'- silt mixtures <br /> N > no. 4'sieve size) , <br /> 1' ,y GC Cloyey'gravels, gravel - sand - clay mixtures <br /> < <br /> -- cn Y <br /> Ca L o. . SW We€l graded sands or gravelly sands, little or no fines <br /> w ` SANDS <br /> { En <br /> 0 <br /> SP Poorly graded sands or gravelly sends, little or.no fines <br /> o ^ (More than 1/2 of <br /> v coarse frpctior < SM Silty sands, sand - silt mixtures <br /> no, 4 -sieve size) <br /> ' SC Clayey spuds, 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 /> " CL Inorganic clays of low to medium plasticity, gravelly clays_, ' <br /> Z) <br /> co <br /> N _ LL < 50 sandy clays, silty clays, lean cloys <br /> o m OL Organic silts and organic silty clays of low plasticity <br /> H r N - <br /> < oo II I I II II II II Inorganic silts, micaceous or diatomaceous fine sandy <br /> SILTS & CLAYS MH 1I I I°11I I I I lt $ llI or silty.soils, elastic silts <br /> v <br /> o Cy Inorganic clays, of high plasticity, fat clays <br /> s� v <br /> LL > 50 Or anic cia s of medium to high Iesticit <br /> 9 Y 9 p Y..organic <br /> OH Y Y silt clays, organic silts <br /> " HIGHLY ORGANIC SOILS " P.t - ___ Peak and other highly organic soils , <br /> CONSISTENCY CLASSIFICATION : GRAIN SIZE CLASSIFICATION <br /> COHESIVE SOILS GRANULAR SOILS CLASSIFICATION RANGE OF GRAIN SIZES <br /> Description Blows/ftDescription @lows/ft.' U.S. Standard Grain Size <br /> Very Soft .. < 3 Very Loose < 5 Sieve size in Millimeters , <br /> Sof,t 3 5 Loose 5 - 15 80ULDERS 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 75.2 to 4.76 <br /> Very Stiff 21 - 40 Very Dense > 65 coarse (c) 3" to 3/4" 76.2 to 19.1 <br /> fine (f) 3/4" to No. 4 19.1 to 4-76 <br /> Hard > 40' <br /> - "-Blows/ft.-lower 12- inch interval of drive, or as noted. SAND No. 4 to No. 200 4.76 to 0.074 <br /> 140 Ib. hammer, 30" drop. California Sampler. - coarse (c). No.'4 to No. TO 4.75 to 2.00 <br /> i - - - - medium (m) No 10 to No '40, 2.00 to 0.420 <br /> OTHER SYMBOLS - fine (f) No. 40 to No. 200 ,0.420 to 0.074 <br /> V LLII SYMBOLS SILT & CLAY - Below No. 200 Belcw 0-074 <br /> Soil Sample <br /> = Initial Water Level <br /> �f= Final Water Level <br /> Estimated or gradational material <br /> change line <br /> Observed material change line <br /> tj.� <br /> SOIL CLASSIFICATION CHARTS WKA NO: 2088_.04 <br />; a GRANITE CONSTRUCTION FACILITY DATE: 10/93 <br /> WALLACE KUHL, & ASSOCIATES, INC. C <br /> GEOTECHNICAL BNGINHHRING Frtri'ICFI Camp; CQlI{OrfIIC! PLATE NO: V <br /> GEOLOGIC &. ENVIRONMENTAL SERVICES <br />