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CLASSIFICATION CHART <br /> GIGS <br /> 40 MAJOR DIVISIONS SYMBOLS TYPICAL NAMES FILL <br /> PATTERN <br /> GW O Well graded gravels or gravel-sand mixtures, little or no fines 2fi <br /> fn w GRAVELS ' 0 Poorly graded gravels or gravel-sand mixtures, little or no fines 25 <br /> J N GP <br /> Qin MORE THAN 1/2 OF <br /> (r7 w COARSE FRACTION> Silty gravels, gravel-sand mixtures <br /> C3 LU NO 4 SIEVE SIZE GM <br /> 2s=11 <br /> Zrn GC Clayey gravels, gravel-sand-clay mixtures 26=14 <br /> o <br /> o Well graded sands or gravelly sands, little or no fines 8 <br /> CD z SW <br /> Uj a4^ SANDS <br /> V) 0SP Poorly graded sands or gravelly sands, little or no fines B <br /> u� <br /> °G MORE THAN t/2 OF <br /> v o COARSE FRACTION< SM Silly sands sand-sill mixtures 8 <br /> NO 4 SIEVE SIZE <br /> SC Clayey sands, sand-clay mixtures 10 <br /> w Inorganic siltys and very fine sands, rock flour, silty or clayey 11 <br /> ML fine sands or clayey silts with slight plasticity <br /> w SILTS � �S Inorganic clays of low to medium plasticity, gravelly clays, <br /> rn w CL sandy clays, silty clays, lean clays 14 <br /> Z0 V)o �,j 50 OL 1 1 I I Organic silts andorganic silty clays of low plasticity 18 <br /> d c Inorganic silts, micaceous or diatomaceous fine sandy or silty S2 <br /> Z MH sods, elastic silts <br /> M SILTS & CLAYS <br /> Z � CH Inorganic clays of high plasticity, fat clays 15 <br /> LL 50 <br /> LLy � Organic clays of medium to high plasticity, organic silty clays, <br /> o OH , / organic silts 35 <br /> HIGHLY ORGANIC SOILS Pt Peat and other Nightly organic soils 20 <br /> GRAIN SIZE CHART WELL CONSTRUCTION MATERIALS <br /> RANGE OF GRAIN SIZES Im <br /> Asphalt (68) SCREENS <br /> CLASSIFICATION U S Standard Grain Size >vn Concrete (55) Solid (1s} <br /> Sieve Size in Millimeters <br /> BOULDERS Above 12' Above 305 � '„ Neat Cement (54) <br /> Slotted PVC (3w) <br /> COBBLES 12' to 3' 305 to 76 2 0 o Base Course (30) <br /> GRAVEL 3' to No 4 76 2 to 4 75 ® Sluff (64) a Slot PVC High Flow (8w) <br /> COARSE 3' to 3/4' 76 2 to 19 1 <br /> FIDE 3/4' to No 4 101 to 4 75 ®Bentonite (21) Wire Wound PVC (16w) <br /> SAND NO 4 t0 NO 200 4 7$ to 0 074 <br /> COARSE No 4 to No 10 4 76 to 2 00 Filter Pack (7) <br /> MEDIUM No 10 to No 40 200 to 0 420 ® Wire Wound Steel (15w} <br /> FINE No 40 to No 200 0 420 to 0 074 <br /> Pea Gravel (2) <br /> SILT & CLAY Below No 200 Below No 0 074 ® <br /> liner (33) Saw Cut (12x) <br /> Geoclolh (36) <br /> SAMPLE TYPES SYMBOLS <br /> SS — Split Spoon Initial Water Level <br /> CC -- Continuous Core Static Water Level <br /> CG — Cuttings Grab D (�] GROUNDWATER <br /> 04/03/1892 keyprmt-ran El J5 <br /> TECHNOLOGY <br />