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o Well graded gravel and Terms Describing Relative Density and Consistency <br /> °°°°'OW gravel with sand, little to 12) <br /> 0000c Density SPT blows/foot <br /> a, c o c no fines Very Loose 0 to 4 <br /> w It�0 o Coarse-a) Zi3 Loose 4 to 10 <br /> o ' 0 0°0° Poorly-graded gravel Grained Soils Medium Dense 10 to 30 <br /> in `^'o 0 0 0 o GP and gravel with sand, Test Symbols <br /> 0 0 000p0 toDense 30to50 G=Grain Size <br /> o d 00000 little no fines Very Dense >50 <br /> N o z 0 0 0 0 0 t21 M= Moisture Content <br /> Z o c L <br /> cx Consistency SPT blows/foot A=Atterberg Limits <br /> 10-0 o o Silty gravel and silty Very Soft 0 to 2 C=Chemical <br /> o .2 a=-N c°c°( GM gravel with sand Fine- <br /> a) ° 0° 0 Soft 2 to 4 DD= Dry Density <br /> Grained Soils <br /> c ° o Medium Stiff 4 to 8 K=Permeability <br /> .� 1 N ,� t, Stiff 8 to 15 <br /> N ..�.. Clayey gravel and Very Stiff 15 to 30 <br /> > NI GC clayey gravel with sand Hard >30 <br /> 10 c5 �'f.,/ Component Definitions <br /> m Well-graded sand and Descriptive Term Size Range and Sieve Number <br /> U �' <br /> Sys sand with gravel,little Boulders Larger than 12" <br /> a) <br /> o m ”,- to no fines Cobbles 3"to 12" <br /> i Gravel 3"to No.4(4.75 mm) <br /> o Poorly-graded sand Coarse Gravel 3"to 3/4" <br /> 0 ---- SP and sand with gravel, Fine Gravel 3/4"to No.4(4.75 mm) <br /> a o .e little to no fines <br /> c a, Sand No.4(4.75 mm)to No.200(0.075 mm) <br /> t„ z Coarse Sand No.4(4.75 mm)to No.10(2.00 mm) <br /> m so °N' SM Silty sand and Medium Sand No.10(2.00 mm)to No.40(0.425 mm) <br /> N silty sand with Fine Sand No.40(0.425 mm)to No.200(0.075 mm) <br /> a m <br /> v o a LL gravel Silt and Clay Smaller than No.200(0.075 mm) <br /> a - SC Clayey sand and (3)Estimated Percentage Moisture Content <br /> Ail clayey sand with gravel Component Percentage by Weight Dry-Absence of moisture, <br /> dusty,dry to the touch <br /> Trace <5 <br /> Silt,sandy silt,gravelly silt, Slightly Moist-Perceptible <br /> moisture <br /> a, o ML silt with sand or gravel Some 5 to<12 <br /> > in <br /> Moist-Damp but no visible <br /> i. Modifier 12 to<30 water <br /> o m : ' Clay of low to medium (silty,sandy,gravelly) Very Moist-Water visible but <br /> `� U a not free draining <br /> d j plasticity;silty,sandy,or <br /> z j CL Very modifier 30 to<50 Wet-Visible free water, <br /> j gravelly clay, lean clay usually <br /> o w (silty,sandy,gravelly) from below water table <br /> a Organic clay or silt of low Symbols <br /> 2 — OL plasticity Blows/6"or <br /> 0 2 _= Sampler portion of 6" c Cement grout <br /> o — — Type \ >> surface seal <br /> Elastic silt,clayey silt,silt 2 0"OD O / Sampler Type <br /> p Yp <br /> v0 1" Bentonite <br /> with micaceous or 15 Description <br /> o a, MH Split-Spoon p c<> seal <br /> o diatomaceous fine sand or Sampler <br /> co p 3.0"OD Split-Spoon Sampler -.:; Filter pack with <br /> .o m$ E silt (SPT) 3.25"OD Split-Spoon Ring Sampler (4> ;. ::_blank casing <br /> co G o % Clay of high plasticity, section <br /> le) "' sandyor gravellyclay, Bulk sample =- <br /> c�= CH Y 3.0"OD Thin-Wall Tube Sampler = •= Screened casing <br /> m N clay with sand or gravel _ (including Shelby tube) or Hydrotip <br /> Grab Sample <br /> _ with filter pack <br /> c c- /ii�l Organic clayor silt of 0 Portion not rccovcrcd • .• End cap <br /> ii�i g <br /> z, L.L. J ;�„� OH medium to high tit I4> <br /> 0 ��i��i;i Percentage by dry weight Depth of ground water <br /> d. 2- plasticity (2) (SPT)Standard Penetration Test <br /> b 1 ATD=At time of drilling <br /> _ _ (ASTM D-1586) Q Static water level(date) <br /> w L ,, Peat, muck and other t3> In General Accordance with <br /> r rn a,'3 PT highly organic soils Standard Practice for Description (5) Combined USCS symbols used for <br /> O= � <br /> F .,.Ati and Identification of Soils(ASTM D-2488) tines between 5%and 12% <br /> D <br /> oClassifications 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 /> 3 methods of ASTM D-2487 and D-2488 were used as an identification guide for the Unified Soil Classification System. <br /> 1) 00 I 0 yI (� )5 <br /> . ; associated <br /> -iz, iiiii„,,",j earth sciences EXPLORATION LOG KEY FIGURE a`i,,_ _ / <br /> incorporated <br /> a <br />