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4 <br /> GROUND ZERO ANALYST <br /> METHOD aF SOIL CLASSIFICATION <br /> MAJOR DIVISIONS SYMBOLS TYPICAL NAMES <br /> GNI WELL GRADED GRAVELS OR GRAVEL-SAND MIXTURES, LITTLE OR NO FINES <br /> N GRAVELS ati <br /> GP anP POORLY GRADED GRAVELS OR GRAVEL-SAND MIXTURES, LITTLE OR NO FINES <br /> �, °r9 <br /> O �, <br /> V) (MORE THAN 1/2 OF GM SILTY GRAVELS GRAVEL-SANT]-SILT MIXTURES <br /> a COARSE FRACTION } <br /> L4 z NO 4 SIEVE SIZE) o <br /> Z A GC C CLAYEY GRAVELS, GRAVEL-SAND--CLAY MIXTURES <br /> J <br /> 0 e Sw WELL GRADED SANDS OR GRAVELY SANDS, LITTLE OR NO FINES <br /> L)� <br /> SANDS <br /> SID Kim, POORLY GRADED SANDS OR GRAVELY SANDS, LITTLE OR NO FINES <br /> (MORE THAN 1/2 OF SM SILTY SANDS SAND-SILT MIXTURES <br /> COARSE FRACTION < <br /> NO 4 SIEVE SIZE) <br /> SC CLAYEY SANDS, SAND-CLAY MIXTURES <br /> INORGANIC SILTS AND VERY FINE SANDS ROCK FLOWER, SILTY OR CLAYEY <br /> ML 111 FINE SANDS OR CLAYEY SILTS WITH SLIGHT PLASTICITY <br /> „_,J SILTS & CLAYS ' <br /> O <br /> CL INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, GRAVELY CLAYS, <br /> SANDY CLAYS, SILTY CLAYS LEAN CLAYS <br /> LLC50 I I <br /> OL ORGANIC SILTS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY <br /> La! v ii�iii <br /> Z <br /> INORGANIC SILTS, MICACEOUS OR DIATOMACECOUS FINE SANDY OR SILTY <br /> of 'g MH SOILS, ELASTIC SILTS <br /> 0*- SILTS & CLAYS <br /> Lit CH INORGANIC CLAYS OF HIGH PLASTICITY, FAT CLAYS <br /> Z <br /> �- LL>JO ©� ir� ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICITY, ORGANIC SILTY CLAYS <br /> r ORGANIC SILTS <br /> HIGHLY ORGANIC SOILS P} PEAT AND OTHER HIGHLY ORGANIC SOILS <br /> CLASSIFICATION CHART <br /> ( UNIFIED SOIL CLASSIFICATION SYSTEM J <br /> T W RANGE OF GRAIN SIZES - <br /> CLASSIFICATION U S STANDARD GRAIN SIZE SANDS AND GRAVELS BLOWS/FOOT <br /> SIEVE SIZE IN MILLIMETERS <br /> VERY LOOSE 0 - 4 <br /> BOULDERS ABOVE 12" ABOVE 13" LOOSE 4 - 10 <br /> COBBLES 12" TO 3" 305 TO 762 MEDIUM DENSE 10 - 30 <br /> DENSE 30 - 50 <br /> GRAVEL 3" TO NO 4 762 TO 476 VERY DENSE OVER 50 <br /> COARSE 3" TO 1/4" 762 TO 191 - - - - <br /> FINE 3/4" TO NO 4 19 1 TO 4 76 RELATIVE DENSITY <br /> SAND NO 4 TO NO 200 4 760 TO 0 074 -- f I <br /> SILTS AND CLAYS BLOWS/FOOT <br /> COARSE NO 4 i0 NO 10 476o TO 2000 -- <br /> MEDIUM NO 10 TO NO 40 2 000 TO 0 420 <br /> 1 FINE NO 40 TO NO 200 O 420 TO 0 074 VERY SOFT 2 <br /> 2 <br /> SOFT 2 - 4 1 <br /> SILT & CLAY BELOW NO 20q BELOW 0 074 MEDIUM STIFF 4 - 8 <br /> STIFF 8 16 <br /> GRAIN SIZE' CHART VERY STIFF 16 32 <br /> - � <br /> HARD OVER 32 <br /> I <br /> + NUMBER OF BLOW$ OF 140 POUND HAMMER FALLING 30 INCHES TO DRIVE A CONSISTENCY <br /> 2 INCH: 0 D (1-3/8 INCH 10) SPLIT SPOON (ASTM D--1585) <br />