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o <br />Well -graded gravel and <br />Terms Describing Relative Density and Consistency <br />LLgoad <br />Gvt► <br />gravel with sand, little to <br />Density SPT%lows/foot <br />- <br />o <br />no fines <br />Coarse Very Loose 0 to 4 <br />U <br />HI <br />Loose 4 to 10 <br />Grained Soils Medium Dense 10 to 30 Test Symbols <br />° <br />° ° <br />o ° o ° o <br />GP <br />Poorly -graded gravel <br />in <br />46 <br />`r <br />° o ° o ° <br />and gravel with sand, <br />Dense 30 to 50 <br />o <br />0 <br />c <br />0000a <br />little to no fines <br />Very Dense >50 G =Grain Size <br />a <br />o Z <br />o o <br />o° o°° <br />(2) M= Moisture Content <br />° <br />Silty gravel and silty <br />Z <br />C) ° <br />Consistency SPT blows/foot A = Atterberg Limits <br />C <br />c v <br />,o <br />IT <br />GM <br />gravel with sand <br />Very Soft 0 to 2 C= Chemical <br />Fine- Soft 2 to 4 DD = Dry Density <br />0 <br />d <br />A <br />LL <br />° 0 <br />Grained Soils Medium Stiff 4 to 8 K = Permeability <br />a <br />Stiff 8 to 15 <br />y <br />N <br />Clayey gravel and <br />Very Stiff 15 to 30 <br />ve <br />Nl <br />GC <br />clayey gravel with sand <br />Hard >30 <br />Component Definitions <br />Descriptive Term Size Range and Sieve Number <br />o <br />Well -graded sand and <br />r <br />syy <br />sand with gravel, little <br />Boulders Larger than 12' <br />0 <br />LL <br />: <br />to no fines <br />Cobbles 3" to 12" <br />.. <br />Gravel 3" to No. 4 (4.75 mm) <br />> <br />- =''• <br />Poorly -graded <br />Poor/ raded sand <br />Coarse Gravel 3" to 3/4" <br />r°n <br />°' <br />�t <br />_ <br />'• :'•': <br />SP <br />and sand w€th gravel, <br />Fine Gravel 3/4" to No. 4 4.75 mm <br />( ) <br />c <br />c v <br />as <br />little to no fines <br />Sand No. 4 (4.75 mm) to No. 200 (0.075 mm) <br />z <br />Coarse Sand No. 4 (4.75 mm) to No. 10 (2.00 mm) <br />° <br />Silty sand and <br />Medium Sand No. 10 (2.00 mm) to No. 40 (0.425 mm) <br />L <br />w <br />�' <br />SM <br />silty sand with <br />Fine Sand No. 40 (0.425 mm) to No. 200 (0.075 mm) <br />�j <br />o o <br />::.:: <br />gravel <br />Silt and Clay Smaller than No. 200 (0.075 mm) <br />to <br />_ - <br />' <br />sc <br />Clayey sand and <br />0) Estimated Percentage <br />Moisture Content <br />An <br />: <br />clayey sand with gravel <br />Component Percentage by Weight <br />Dry - Absence of moisture, <br />dusty, dry to the touch <br />Trace <5 <br />Slightly Moist - Perceptible <br />Silt, sand silt, ravel) silt, <br />y gravelly <br />mo isture <br />m <br />N <br />MIL <br />silt with sand or gravel <br />Some 5 to <12 <br />> <br />Moist - Damp but no visible <br />in <br />0 <br />Modifier 12 to <30 <br />water <br />Clay of low to medium <br />N <br />W m <br />(silty, sandy, gravelly) <br />Very Moist - Water visible but <br />CL <br />plasticity; silty, sandy, or <br />not free draining <br />z° <br />N <br />y <br />gravelly clay, lean clay <br />Very modifier 30 to <50 <br />Wet Visible free water, usually <br />_ <br />(silty, sandy, gravelly) <br />from below water table <br />A <br />a <br />Organic clay or silt of low <br />Symbols <br />42 <br />— _ <br />OIL <br />plasticity <br />Blows/0'or <br />2 <br />___ <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 Sampler Type <br />MH <br />with micaceous or <br />;s Description (4) <br />Split -Spoon 2 <br />Bentonite <br />seal <br />0 <br />� <br />h 0 <br />diatomaceous fine sand or <br />Sampler 3.0 OD Split -Spoon Sampler <br />" <br />;• Filter pack with <br />c <br />eTa `o <br />silt <br />(SPT) 3.25" OD Split -Spoon Ring Sampler (4) <br />: blank casing <br />Clay of high plasticity, <br />w <br />avi <br />o <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 />`6 <br />clay with sand or.gravel <br />(including Shelby tube) <br />or Hydrotip <br />with filter pack <br />c� <br />o <br />g <br />Grab Sample <br />: End cap <br />rrrir <br />c <br />M <br />a <br />J <br />i�fri�rr <br />Organic clay or silt of <br />o Portion not recovered <br />r, <br />rrrrrrr <br />OH <br />medium to high <br />(1) (41 <br />Percentage by dry weight Depth of ground water <br />rif�rrrr <br />plasticity <br />(2) (SPT) Standard Penetration Test <br />ASTM D-1566 1 ATD = At time of drilling <br />( ) Static water level (date) <br />(3) In General Accordance with <br />> •C <br />Peat, muck and other <br />= <br />co <br />PT <br />highly organic soils <br />Standard Practice for Description (5) Combined USCS symbols used for <br />O <br />and Identification of So€Is (ASTM D-248B) 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€ a t e d <br />I earth sciences EXPLORATION LOG KEY FIGURE Al <br />:. i n, 0 r p 0 r a t a d <br />