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ti <br /> i <br /> Well-graded gravel and Terms Describing Relative Density and Consistency <br /> 8°8° GW gravel with sand, little to (2) <br /> o r c 0 Density SPT blows/foot <br /> Li- �� no fines Very Loose 0 to 4 <br /> a) kJ > e44,o Coarse- Loose 4 to 10 <br /> Poorly-graded gravel Grained Soils Medium Dense 10 to 30 <br /> 2 v in vit° o 0 o GP andgravel with sand Test Symbols <br /> o o v 0 o 9 0 0 Dense 30 to 50 G=Grain Size <br /> o " d ° ° ° little to no fines Very Dense >50 <br /> N o z °o°o° M =Moisture Content <br /> Z° c 0), <br /> Consistency SPT(2)blows/foot A=Atterberg Limits <br /> o 0�' GM Silty gravel and siltyVery Soft 0 to 2 C=Chemical <br /> s 2s gravel with sand Fine- Soft 2 to 4 DD—Dry Density <br /> •3aGrained Soilsc E a, : Medium Stiff 4 to 8 K=Permeability <br /> 2. mStiff 8 to 15 <br /> 0, NGC Clayey gravel and Very Stiff 15 to 30 <br /> clayey gravel with sand Hard >30 <br /> -• Component Definitions <br /> c CD <br /> C • Well-graded sand and Descriptive Term Size Range and Sieve Number <br /> SW sand with gravel,little Boulders Larger than 12" <br /> o �i or " <br /> to no fines Cobbles 3"to 12 <br /> a) Gravel 3"to No.4(4.75 mm) <br /> Poorly-graded sand Coarse Gravel 3"to 3/4" <br /> co C)°' -:• - SP and sand with gravel, Fine Gravel 3/4"to No.4(4.75 mm) <br /> a o little to no fines <br /> Sand No.4(4.75 mm)to No.200(0.075 mm) <br /> t° o z i..-'':-. Coarse Sand No.4(4.75 mm)to No.10(2.00 mm) <br /> a— .:. : Silty sand and Medium Sand No. 10(2.00 mm)to No.40(0.425 mm) <br /> • ui . SM silty sand with Fine Sand No.40(0.425 mm)to No.200(0.075 mm) <br /> cm -- m n,.:_ .-.•'- <br /> o o a [2.1- gravel Silt and Clay Smaller than No.200(0.075 mm) <br /> :, N , Sc Clayey sand and (3)Estimated Percentage Moisture Content <br /> clayey sand with gravel DryAbsence of moisture. <br /> f=: Component Percentage by Weight - <br /> /f•�. : dusty,dry to the touch <br /> :/ Trace <5 <br /> Slightly Moist-Perceptible <br /> Silt, sandy silt,gravelly silt, <br /> a� F ML. silt with sand or gravel Some 5 to<12 <br /> moisture <br /> n Moist-Damp but no visible <br /> -CO tO Modifier 12 to<30 water <br /> o e�''''C' �% Clay of low to medium (silty,sandy,gravelly) Very Moist-Water visible but <br /> C" v a % not free draining <br /> d 2 J �;,� CL plasticity; silty, sandy,or <br /> z = :/ Very modifier 30 to<50 Wet-Visible free water,usually <br /> N •• E gravelly clay, lean clay y gravelly) from below water table <br /> a) _ J /, (silty,sandy, ravel/ <br /> O 5 !. Organic clay or silt of low Symbols <br /> m `_= OL plasticity Blows/6"or <br /> o == Sampler portion of 6" :< Cement grout <br /> — — Type N >> surface seal <br /> ° Elastic silt,clayey silt,silt 2.0"OD t Sampler Type <br /> o <br /> a, MH with micaceous or Split-Spoon p x, Description t.� 111 Ben onite <br /> 0 io diatomaceous fine sand or <br /> o Sampler �/ " 3.0"OD Split-Spoon Sampler ; : Filter pack with <br /> • 0 o silt (SPT) ' 3.25"OD Split-Spoon Ring Sampler (4) .blank casing <br /> co Clay of high plasticity, <br /> U in Bulk sample .section <br /> ail c cH sandy or gravelly clay,fat 3.0"OD Thin-Wall Tube Sampler ' — casing <br /> ;Screened <br /> f° E clay with sand or gravel 0 (including Shelby tube) =or Hydrotip <br /> J i <br /> Grab Sample — with filter pack <br /> C9 - 2 �ir 'End cap <br /> ✓ c • <br /> � �i;;/;; Organic clay or silt of ® Portion not recovered <br /> 0 u- J /,/// OH medium to high i1; i4j <br /> �;i% plasticity Percentage by dry weight Depth of ground water <br /> b , 12> (SPT)Standard Penetration Test 1 ATD=At time of drilling <br /> N (ASTM D-1586) Static water level(date) <br /> v ,,_ Peat, muck and other (3) In General Accordance with <br /> L C N ✓,N�✓ <br /> • Ca a PT highly organic soils Standard Practice for Description t5j Combined USCS symbols used for <br /> l6 Q • <br /> co ./,..1/../lIJ <br /> = and Identification of Soils(ASTM D-2488) fines between 5%and 12% <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 /> 5 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 /> -o <br /> d <br /> x <br /> o associated <br /> , 40.,... <br /> earth sciences EXPLORATION LOG KEY FIGUREA1 <br /> 0 <br />