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CLASSIFICATION CHART <br />GRAIN SIZE CHART <br />RANGE OF GRAIN SIZES <br />CLASSIFICATION <br />GTGS <br />MAJOR DIVISIONS <br />SYMBOLS <br />I <br />TYPICAL NAMES <br />FILL <br />PATTERN <br />BOULDERS <br />Above 12' <br />Above 305 <br />�. <br />Well graded gravels or gravel -sand mixtures, little or no tines <br />26 <br />GRAVEL <br />3' to No.A <br />GW <br />o. <br />3' to 314' <br />76.2 to 16.1 <br />FINE <br />F <br />10.1 to 4.75 <br />SAND <br />poorly graded gravels or gravel -sand mixtures, little or no fines <br />25� <br />0 � <br />GP <br />OO <br />No.10 to N0.40 <br />2.00 to 0.420 <br />O n <br />rn <br />MORE THAN 1/2 OF <br />COARSE FRACTION > <br />0.420 to 0.074 <br />SILT s CLAY <br />Below N0.200 <br />Below No.0.074 <br />GM <br />Silty gravels, gravel -sand mixtures <br />26-11 <br />i <br />N0.4 SIEVE SIZE <br />Clayey gravels, gravel -sand -clay mixtures <br />26=14 <br />LLJ <br />Z c <br />07C <br />Q N <br />' <br />Well graded sands or gravelly sands, little or no fines <br />8 <br />LD z <br />SW <br />• <br />0 <br />LO^ <br />SANDS <br />Poorly graded sands or gravelly sands. little or no fines <br />8 <br />U') <br />SP <br />a ¢ <br />o <br />MORE THAN 1/2 OF <br />COARSE FRACTION< <br />Silty sands, sand -silt mixtures <br />9 <br />N0.4 SIEVE SIZE <br />Cu <br />Clayey sands, sand -clay mixtures <br />10 <br />SC <br />Inorganic siltys and very fine sands, rock flour, silty or clayey <br />N <br />ML <br />fine sands or clayey silts with slight plasticity <br />11 <br />rn <br />SU TS & CLAYS <br />Inorganic clays of low to medium plasticity, gravelly clays, <br />14 <br />U) a <br />CL <br />sandy clays, silty clays, lean clays <br />w <br />Q in <br />I <br />Organic silts andorganic silty clays of low plasticity <br />18 <br />OL <br />( I <br />Z o <br />a c <br />Inorganic silts, micaceous or diatomaceous fine sandy or silty <br />12 <br />CC z <br />MH <br />soils, elastic silts <br />Wc <br />SIL7S CLAYS <br />Inorganic clays of high plasticity, fat clays <br />15 <br />Z In <br />CH <br />, <br />Organic clays of medium to high plasticity, organic silty clays, <br />35 <br />LL U <br />Lt.>SD <br />o <br />OH <br />organic silts <br />Peat and other Nightly organic soils <br />20 <br />HIGHLY ORGANIC SOILS <br />Pt <br />GRAIN SIZE CHART <br />SAMPLE TYPES SYMBOLS <br />SS - Split Spoon '2Initial Water Level <br />CC - Continuous Core Static Water Level <br />CG - Cuttings Grab <br />WELL CONSTRUCTION MATERIALS <br />RANGE OF GRAIN SIZES <br />CLASSIFICATION <br />U.S. Standard <br />Grain Size <br />Sieve Size <br />in Millimeters <br />BOULDERS <br />Above 12' <br />Above 305 <br />COBBLES <br />12' to 3' <br />305 to 76.2 <br />GRAVEL <br />3' to No.A <br />76.2 to 4.75 <br />COARSE <br />3' to 314' <br />76.2 to 16.1 <br />FINE <br />31A' to No.4 <br />10.1 to 4.75 <br />SAND <br />N0.4 to No.200 <br />4.75 to 0.074 <br />COARSE <br />No.4 to No.10 <br />4.78 to 2.00 <br />MEDIUM <br />No.10 to N0.40 <br />2.00 to 0.420 <br />FINE <br />No.4O to N0.200 <br />0.420 to 0.074 <br />SILT s CLAY <br />Below N0.200 <br />Below No.0.074 <br />SAMPLE TYPES SYMBOLS <br />SS - Split Spoon '2Initial Water Level <br />CC - Continuous Core Static Water Level <br />CG - Cuttings Grab <br />WELL CONSTRUCTION MATERIALS <br />Asphalt (68) <br />SCREENS <br />.�. , <br />v <br />Concrete (55) <br />Solid (is) <br />Neat Cement (54) <br />Slotted PVC (3w) <br />o ,e <br />Base Course (30) <br />Sluff (64) <br />Slot. PVC High Flow (8w) <br />Bentonite (21) <br />® <br />Hire Wound PVC (lbw) <br />Filter Pack (7) <br />® <br />Wire Wound Steel (15wj <br />Pea Gravel (2) <br />Liner (33) <br />Saw Cut (12w) <br />Geocioth (36) <br />