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GROUP <br />SYMBOL SOIL GROUP NAMES & LEGEND <br />PRIMARILY ORGANIC MATTER, DARK IN COLOR, AND ORGANIC ODOR <br />BLOWS/FOOT* CONSISTENCY <br />SAMPLE TYPES <br />Job No. 16678.20.MNT <br />GRAVELS WITH FINES <br />>12% FINES <br />2.0 - 4.0 <br />OVER 4.0 <br />TERM <br />Trace <br />With <br />Modifier <br />0.50 - 1.0 <br />1.0 - 2.0 <br />0 - 0.25 <br />0.25 - 0.50 <br />GW <br />GP <br />GM <br />GC <br />SW <br />SP <br />SM <br />SC <br />CL <br />ML <br />OL <br />CH <br />MH <br />OH <br />PT <br />CLEAN GRAVELS <br /><5% FINES <br />WATER LEVEL (WITH TIME OF) <br />MEASUREMENT <br />0 - 4 <br />4 - 10 <br />10 - 30 <br />30 - 50 <br />OVER 50 <br />LIQUID LIMIT (%) <br />CH <br />0 <br />10 <br />20 <br />30 <br />40 <br />50 <br />60 <br />70 <br />80 <br />PL <br />A <br />S <br />T <br />I <br />C <br />I <br />T <br />Y <br /> <br />I <br />N <br />D <br />E <br />X <br /> <br />( <br />% <br />) <br />SIZE <br />< 12 in. <br />3 in. - 12 in. <br />#4 sieve to 3 in. <br />#200 sieve to #4 sieve <br />Passing #200 sieve <br />TERM <br />Boulder <br />Cobble <br />Gravel <br />Sand <br />Silt or Clay <br />SAND & GRAVEL <br />CRITERIA FOR ASSIGNING SOIL GROUP NAMES <br />- <br />- <br />- <br />MC <br />OC <br />CN <br />DD <br />PP <br />RV <br />SA <br />P200 <br />>50% OF COARSE <br />FRACTION PASSES <br />ON NO 4. SIEVE <br />RELATIVE DENSITY <br />(RECORDED AS BLOWS / 0.5 FT) <br />CL <br />SILT & CLAY <br />NUMBER OF BLOWS OF 140 LB HAMMER FALLING 30 INCHES TO DRIVE A 2 INCH O.D. <br />(1-3/8 INCH I.D.) SPLIT-BARREL SAMPLER THE LAST 12 INCHES OF AN 18-INCH DRIVE <br />(ASTM-1586 STANDARD PENETRATION TEST). <br />* <br />BLOWS/FOOT* <br />WELL-GRADED GRAVEL <br />POORLY-GRADED GRAVEL <br />SILTY GRAVEL <br />CLAYEY GRAVEL <br />WELL-GRADED SAND <br />POORLY-GRADED SAND <br />SILTY SAND <br />CLAYEY SAND <br />LEAN CLAY <br />SILT <br />ORGANIC CLAY OR SILT <br />FAT CLAY <br />ELASTIC SILT <br />ORGANIC CLAY OR SILT <br />PENETRATION RESISTANCE <br />Hollow Stem <br />LEGEND TO SOIL <br />DESCRIPTIONS <br />FINES CLASSIFY AS ML OR CL <br />FINES CLASSIFY AS CL OR CH <br />PI>7 AND PLOTS>"A" LINE <br />PI>4 AND PLOTS<"A" LINE <br />LL (oven dried)/LL (not dried)<0.75 <br />PI PLOTS >"A" LINE <br />PI PLOTS <"A" LINE <br />LL (oven dried)/LL (not dried)<0.75 <br />COMPRESSIVE <br />STRENGTH (TSF) <br />Chosen Valley Testing <br />- <br />CLEAN SANDS <br /><5% FINES <br />SANDS AND FINES <br />>12% FINES <br />INORGANIC <br />MOISTURE CONTENT <br />ORGANIC CONTENT <br />CONSOLIDATION <br />DRY DENSITY <br />POCKET PENETROMETER <br />R-VALUE <br />SIEVE ANALYSIS <br />% PASSING #200 SIEVE <br />LIQUID LIMIT <br />PLASTISITY INDEX <br />SWELL TEST <br />Unconsolidated Undrained triaxial <br />LL <br />PI <br />SW <br />UU <br />PERCENT <br />< 5 <br />5 - 12 <br />> 12 <br />Relative Proportions of Fines <br />Standard Penetration Test <br />VERY SOFT <br />SOFT <br />RATHER SOFT <br />MEDIUM <br />RATHER STIFF <br />STIFF <br />VERY STIFF <br />HARD <br />UNIFIED SOIL CLASSIFICATION (ASTM D-2487/2488) <br />ML <br />MH <br />- <br />- <br />- <br />- <br />- <br />- <br />- <br />- <br />TEST SYMBOLS <br />PERCENT <br />< 15 <br />15 - 29 <br />> 30 <br />ORGANIC <br />Relative Proportions of Sand and Gravel <br />0 - 1 <br />2 - 3 <br />4 - 5 <br />6 - 8 <br />9 - 12 <br />13 - 16 <br />17 - 30 <br />OVER 30 <br />INORGANIC <br />TERM <br />Trace <br />With <br />Modifier <br />Grain Size Terminology <br />Cu>4 AND 1<Cc<3 <br />Cu>4 AND 1>Cc>3 <br />FINES CLASSIFY AS ML OR CL <br />FINES CLASSIFY AS CL OR CH <br />ORGANIC <br />VERY LOOSE <br />LOOSE <br />MEDIUM DENSE <br />DENSE <br />VERY DENSE <br />GRAVELS <br />0 10 20 30 40 50 60 70 80 90 100 110 120 <br />MATERIAL <br />TYPES <br />Cu>6 AND 1<Cc<3 <br />Cu>6 AND 1>Cc>3 <br />CV <br />T <br /> <br /> <br />1 <br />6 <br />6 <br />7 <br />8 <br />. <br />2 <br />0 <br />. <br />M <br />N <br />T <br /> <br />( <br />K <br />A <br />P <br />P <br />E <br />L <br /> <br />R <br />E <br />S <br />I <br />D <br />E <br />N <br />C <br />E <br /> <br />A <br />D <br />D <br />T <br />I <br />T <br />I <br />O <br />N <br />) <br />. <br />G <br />P <br />J <br /> <br /> <br /> <br /> <br />5 <br />/ <br />2 <br />8 <br />/ <br />2 <br />0 <br />PEAT <br />SANDS <br />SILTS AND CLAYS <br />LIQUID LIMIT>50 <br />SILTS AND CLAYS <br />LIQUID LIMIT<50 <br />>50% OF COARSE <br />FRACTION RETAINED <br />ON NO 4. SIEVE <br />HIGHLY ORGANIC SOILS <br />CO <br />A <br />R <br />S <br />E <br />- <br />G <br />R <br />A <br />I <br />N <br />E <br />D <br /> <br />S <br />O <br />I <br />L <br />S <br />>5 <br />0 <br />% <br /> <br />R <br />E <br />T <br />A <br />I <br />N <br />E <br />D <br /> <br />O <br />N <br />NO <br />. <br /> <br />2 <br />0 <br />0 <br /> <br />S <br />I <br />E <br />V <br />E <br />FI <br />N <br />E <br />- <br />G <br />R <br />A <br />I <br />N <br />E <br />D <br /> <br />S <br />O <br />I <br />L <br />S <br />>5 <br />0 <br />% <br /> <br />P <br />A <br />S <br />S <br />E <br />S <br />NO <br />. <br /> <br />2 <br />0 <br />0 <br /> <br />S <br />I <br />E <br />V <br />E <br />PLASTICITY CHART <br />"A " L I N E <br />CL-ML