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0 ;o Well-graded gravel and Terms Describing Relative Density and Consistency <br /> m o° GW gravel with sand, little to lei <br /> u- Iu o 0 0 0( Density SPT blows/foot <br /> N D o c no fines Coarse- Very Loose 0 to 4 <br /> a� gl,0 Loose 4 to 10 <br /> Coarse- <br /> as m > 0 00000 <br /> Poorly-graded gravel Grained Soils Medium Dense 10 to 30 <br /> w cn '1 o o 0 o p GP andgravel with sand, Test Symbols <br /> Dense 30 to 50 <br /> o �o d o 0 0 0 o Very Dense >50 G=Grain Size <br /> little to no fines <br /> w o z 00000; M=Moisture Content <br /> z° - o ° 0°o Consistency SPT(2)blows/foot A=Atterberg Limits <br /> a c -a c Silty gravel and silty Very Soft 0 to 2 C=Chemical <br /> 0 w c N ° °( GM gravel with sand Fine- Soft 2 to 4 DD=Dry Density <br /> a a'� LL °0° 0 Grained Soils <br /> c Medium Stiff 4 to 8 K=Permeability <br /> .� ce o ( Stiff 8 to 15 <br /> 4 ��� Clayey gravel and Very Stiff 15 to 30 <br /> a N t GC clayey gravel with sand Hard >30 <br /> to c0 ��• Component Definitions <br /> o Well-graded sand and Descriptive Term Size Range and Sieve Number <br /> SW sand with gravel, little Boulders Larger than 12" <br /> o v to no fines Cobbles 3"to 12" <br /> a1 tLL <br /> Gravel 3"to No.4(4.75 mm) <br /> y F2 N - "- Poorly-graded sand <br /> "o o >� vilCoarse Gravel 3"to 3/4" <br /> e U SP and sand with gravel, Fine Gravel 3/4"to No.4(4.75 mm) <br /> a o v little to no fines <br /> Sand No.4(4.75 mm)to No.200(0.075 mm) <br /> z° Coarse Sand No.4(4.75 mm)to No.10(2.00 mm) <br /> N o h- _-_ Silty sand and Medium Sand No.10(2.00 mm)to No.40(0.425 mm) <br /> v, - sM silty sand with Fine Sand No.40(0.425 mm)to No.200(0.075 mm) <br /> a f0 m-_- <br /> U o a LL _::: • gravel Silt and Clay Smaller than No.200(0.075 mm) <br /> "n o/ .-. <br /> a N SC Clayey sand and (3)Estimated Percentage Moisture Content <br /> Al'-' clayey sand with gravel Component Percentage by Weight Dry-Absence of moisture, <br /> dusty,dry to the touch <br /> - / Trace <5 Slightly Moist-Perceptible <br /> Silt, sandy silt,gravelly silt, <br /> a 0 ML silt with sand or gravel Some 5 to<12 moisture <br /> >a Moist-Damp but no visible <br /> in co z Modifier 12 to<30 water <br /> o m us j VeryMoist-Water visible but <br /> Clay of low to medium (silty,sandy,gravelly) <br /> (N 0 a not free draining <br /> a w A <br /> CL plasticity;silty,sandy,or <br /> z (a._ Very modifier 30 to<50 Wet-Visible free water,usually <br /> gravelly clay, lean clay <br /> a .J (silty,sandy,gravelly) from below water table <br /> CO _= Organic clay or silt of low Symbols <br /> Ecr — OL plasticity Blows/6"or <br /> 0 <br /> _= Sampler portion of 6" '� .<Cement grout <br /> — — Type surface seal <br /> ° Elastic silt,clayey silt,silt / Sampler Type <br /> with micaceous or 2.0"OD ' 15 Description sentonite <br /> o �, pMH Split-Spoon ,. (e seal <br /> rn o diatomaceous fine sand or Sampler P II 3.0"OD Split Spoon Sampler ::Filter pack with <br /> v, o silt (SPT) ' 3.25"OD Split-Spoon Ring Sampler (4) :- blank casing <br /> o Clay of high plasticity, section <br /> �==--- <br /> c wCH sandy or gravelly clay,fat Bulk sample 3.0"OD Thin Wall Tube Sampler — Screened casing <br /> E r;'� clay with sand or gravel 0 (including Shelby tube) -:-=or H droti <br /> _ with filter pack <br /> c7 —a Grab Sample - <br /> -- i/ii� _---End cap <br /> t a i%i%% Organic clay or silt of Q Portion not recovered <br /> U u- J /;;;III OH medium to high (i) (4) <br /> o �����i�� Percentage by dry weight Depth of ground water <br /> a i0i;; plasticity (2) (SPT)Standard Penetration Test <br /> 5 % 1 ATD=At time of drilling <br /> N (ASTM D-1586) Z Static water level(date) <br /> "f >,U N Peat, muck and other (3) In General Accordance with <br /> r a� a)'o PT highly organic soils Standard Practice for Description (5) Combined USCS symbols used for <br /> z O- and Identification of Soils(ASTM D-2488) fines between 5%and 12% <br /> 0 <br /> o 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 /> 3 methods of ASTM D-2487 and D-2488 were used as an identification guide for the Unified Soil Classification System. <br /> V <br /> > <br /> 0 <br /> YII <br /> � <br /> 2 associated <br /> i earth sciences EXPLORATION LOG KEY FIGURE Al <br /> incorporated <br /> a <br />