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M <br />° °° <br />Well -graded gravel and <br />Terms Describing Relative Density and Consistency <br />W <br />u- <br />N <br />1° 8° <br />p p <br />0 <br />GW <br />g ravel with sand, little to <br />(2I <br />Density SPT blows/foot <br />a) <br />° 0 <br />no fines <br />Very Loose 0 to 4 <br />Coarse <br />a) <br />in <br />E > <br />0 ui <br />u- <br />wi <br />Loose 4 to 10 <br />Grained Soils Medium Dense 10 to 30 Test Symbols <br />° ° ° ° ° <br />° ° <br />GP <br />Poorly -graded gravel <br />o d <br />0�0.0 <br />and ravel with sand, <br />9 <br />Dense 30 to 50 <br />0 <br />o <br />d <br />° o ° o ° <br />little to no fines <br />Very Dense >50 G =Grain Size <br />N <br />o z <br />° 0° o° <br />(2) M= Moisture Content <br />° 0 <br />° 0 <br />Silty gravel and silty <br />6 <br />� 0 <br />Consistency SPT blows/foot A = Atterberg Limits <br />0 <br />c <br />Ny <br />GM <br />gravel with sand <br />Very Soft 0 to 2 C = Chemical <br />Fine- <br />a <br />..L�. <br />a) <br />42 <br />, 0 <br />, 0 <br />Soft 2 to 4 DID =Dry Density <br />Grained Soils Medium Stiff 4 to 8 K = Permeability <br />c <br />;a <br />o� <br />of <br />u- <br />o <br />Stiff 8 to 15 <br />N <br />Clayey gravel and <br />Very Stiff 15 to 30 <br />v <br />N <br />NI <br />GC <br />clayey gravel with sand <br />Hard >30 <br />a <br />� <br />m <br />Component Definitions <br />CU <br />0 <br />Well -graded sand and <br />Descriptive Term Size Range and Sieve Number <br />2 <br />-5;>; <br />; : <br />spy <br />sand with gravel, little <br />Boulders Larger than 12" <br />2o <br />ri <br />. <br />:.:.:.e.:. <br />to no fines <br />Cobbles 3" to 12" <br />m <br />` <br />i <br />Gravel 3" to No. 4 (4.75 mm) <br />Poorly -graded raded sand <br />y-g <br />in <br />� > <br />00 °' <br />� <br />vl <br />.. :. � <br />SP <br />and sand with gravel, <br />Coarse Gravel 3" to 3/4" <br />Fine Gravel 3/4" to No. 4 (4.75 mm) <br />a <br />o v <br />d <br />little to no fines <br />Sand No. 4 (4.75 mm) to No. 200 (0.075 mm) <br />0 z <br />Coarse Sand No. 4 (4.75 mm) to No. 10 (2.00 mm) <br />2 N <br />Silty sand and <br />Medium Sand No. 10 (2.00 mm) to No. 40 (0.425 mm) <br />y <br />° <br />SM <br />silty sand with <br />Fine Sand No. 40 (0.425 mm) to No. 200 (0.075 mm) <br />U <br />o <br />i` <br />gravel <br />Silt and Clay Smaller than No. 200 (0.075 mm) <br />N <br />. <br />sc <br />Clayey sand and <br />(3) Estimated Percentage <br />Moisture Content <br />clayey sand with gravel <br />Component Percentage by Weight <br />D Absence of moisture, <br />Dry - <br />Trace <5 <br />dusty, dry to the touch <br />Slightly Moist - Perceptible <br />Silt, sandy silt, gravelly silt, <br />moisture <br />0)$ <br />ML <br />silt with sand or gravel <br />Some 5 to <12 <br />Moist - Damp but no visible <br />in <br />c <br />w <br />Modifier 12 to <30 <br />water <br />of low to medium <br />(silty, sandy, gravelly) <br />Very Moist - Water visible but <br />N <br />d <br />(aClay <br />-Q <br />CL <br />plasticity; silty, sandy, or <br />not free draining <br />Z <br />= <br />gravelly clay, lean Clay <br />Very modifier 30 to <50 <br />Wet - Visible free water, usually <br />(silty, sandy, gravelly) <br />from below water table <br />a <br />=—_ <br />Organic clay or silt of low <br />Symbols <br />Cr <br />M <br />_— <br />OL <br />plasticity <br />Blows/6" or <br />Sampler portion of 6" <br />Cement grout <br />° <br />-- <br />Type \ <br />surface seal <br />Elastic silt, clayey silt, silt <br />2 0" OD \ o Sampler Type <br />o <br />MH <br />with micaceous or <br />5 Description <br />Split -Spoon p (4) <br />Bentonite <br />seal <br />O <br />N <br />o <br />diatomaceous fine sand or <br />silt <br />Sampler 3.0" OD Split -Spoon Sampler - <br />:. Filter pack with <br />oo <br />0 <br />(SPT) 3.25" OD Split -Spoon Ring Sampler (4) <br />; . <br />:: blankcasing <br />Clay of high plasticity, <br />(n <br />a <br />U <br />c � <br />CH <br />sandy or gravelly clay, fat <br />Bulk sample 3.0" OD Thin Wall Tube Sampler <br />section <br />' Screened casing <br />FU <br />- <br />ca E <br />clay with sand or gravel <br />(including Shelby tube) <br />or Hydrotip <br />with filter pack <br />— � <br />- <br />Grab Sample <br />End cap <br />i <br />Organic clay or silt of <br />p Portion not recovered <br />OH <br />medium to high <br />(1) (4) <br />Percentage by dry weight Depth of ground water <br />plasticity <br />(2) (SPT) Standard Penetration Test (ASTM D-1586) 1 ATD = At time of drilling <br />(3) Q Static water level (date) <br />In General Accordance with <br />> <br />c <br />Peat, muck and other <br />a> <br />_ <br />a, C/) <br />PT <br />highly organic soils <br />Standard Practice for Description (5) Combined USCS symbols used for <br />O <br />and Identification of Soils (ASTM D-2488) fines between 5% and 12% <br />Classifications of soils in this report are based on visual field and/or laboratory observations, which include density/consistency, moisture condition, grain size, and <br />plasticity estimates and should not be construed to imply field or laboratory testing unless presented herein. Visual -manual and/or laboratory classification <br />methods of ASTM D-2487 and D-2488 were used as an identification guide for the Unified Soil Classification System. <br />a s s o c i a t e d <br />earth sciences EXPLORATION LOG KEY FIGURE Al <br />i n c o r p o r a t e d <br />