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RELATIVE DENSITY I CONSISTENCY TEST SYMBOLS <br /> for In Situ and Laboratory Tests <br /> SAND/GRAVEL SILT/CLAY listed in"Other7ests"column. <br /> Density SPT Approx.Rel�ative : Consistency : SPT Approx.Undrained Shear ATT Atterberg Limit Test <br /> � N-values � Density(/o) N•values Strength(ps� <br /> Comp Compaction Tests <br /> Very Loose : <4 <15 : Very Soft <2 <250 Con Consolidation <br /> Loose 4 to 10 15-35 � Soft 2 to 4 250-500 DD Dry Density <br /> Med.Dense : 10 to 30 � 35-65 : Med.Stiff 4 to S 500•1000 DS Direct Shear <br /> Dense 30 to 50 ' 65•85 � Stiff 8 to 15 1000-2000 %F Fines Content <br /> Very Dense : >50 85•100 : Very Stiff 15 to 30 2000-4000 GS Grain Size <br /> � Hard >30 >4000 Perm Permeability <br /> PP Pocket Penetrometer <br /> UNIFIED SOIL CLASSIFICATION SYSTEM R R-value <br /> MAJOR DIVISIONS GROUP DESCRIPTIONS SG SpecificGravity <br /> � •�• GW: Well•graded GRAVEL N Torvane <br /> Gravel : GRAVEL <5%fines � ������•••••• ••�� �������� � <br /> ............................... <br /> ( ) � . TXC Triaxial Compression <br /> 50%or more of the coarse : � GP : Poorly-graded GRAVEL <br /> - •• •�•�� ���� � ������ � ������������� � UCC UnconfinedCam ression <br /> fraction retained on the#4 '� ������ � � � ����� , , • P <br /> sieve.Use dual symbols(eg. : o GM: Silty GRAVEL <br /> - GP-GM)for 5%to 12%fines. . . GRAVEL(>12/o fines) �o ..:.......... .. ..... ..... .... .. .. . . ... . <br /> . GC: Clayey GRAVEL SYMBOLS <br /> ..........................:. ............................ ......:....................................................... Samplelin Situ test types and intervals <br /> ' : :::::::: SW: Well-graded SAND <br /> Sand : SAND(<5/o fines� �.�;': � = � •�� • • � ������� ���������� � 2-inch OD Split Spoon,SPT <br /> 50%or more of the coarse : o ';':� SP : Poorly-graded SAND 140-Ib.hammer,30"dro <br /> ........................... �:.•.> . ..:.......................... <br /> ........................... <br /> fraction passing the#4 sieve. : �'�""� SM: Sil SAND <br /> Use duai symbols(eg.SP•SM) ��,, � . �' <br /> ...,: <br /> ..SAND >12%fines ......................................................... <br /> for 5%to 12/fines. : ( 1 � 3.25-inch OD S ilt S oon <br /> . SC : Clayey SAND p P <br /> ...................................:. ............................. . . ..:....................................................... (300-Ib hammer,30"droP) <br /> ML : SILT <br /> Liquid Limit<50 CL, Lean CLAY ............................ � Non-stantlard penetration <br /> ; .....:......................... . <br /> Silt and Clay =— OL : Organic SlLT or CLAY test(see boring log for details) <br /> 50%or more passing#200 sieve :.................................. _— .....:...................................................... <br /> MH: Elastic SILT.. . . . .. .... ....... . , Thin wall(Shelby)tube <br /> : Liquid Limit>50 CH Fat CLAY <br /> . .. .... . <br /> : OH : Organic SILT or CLAY <br /> ......................9..y...9....:.................................. ....:....................................................... � Grab <br /> Hi hl Or anic Soils � PT : PEAT <br /> NOt@S: 1. Soil exploration logs contain material descriptions based on visual observation and feld tests using a system <br /> modified from the Uniform Soil Classification System(USCS�.Where necessary laboratory tests have been � Rock core <br /> conducted(as noted in the"Other Tests"column),unit descriptions may include a classification.Please refer to the <br /> discussions in the report text for a more complete description of the subsurface conditions. <br /> 2. The graphic symbols given above are not inclusive of all symbols that may appear on the borehole logs. � Vane Shear <br /> Other symbols may be used where feld observations indicated mixed soil constituents or dual constituenf materials. <br /> DESCRIPTIONS OF SOIL STRUCTURES <br /> Layered: Units of material distinguished by color andlor Fissured: Breaks along defined planes MONITORING WELL <br /> compositlon from material units above and below <br /> Slickensided: Fracture planes that are polished or giossy SZ Groundwater Level at <br /> Laminated: Layers of soil typically 0.05 to 1 mm thick,max.1 cm Block : An ular soil lum s that resist breakdown time of drilling(ATD) <br /> Y 9 P 1 Static Groundwater Level <br /> . Lens: Layer of soil that pinches out laterally Disrupted: Soil that is broken and mixed Cement/Concrete Seal <br /> Interlayered: Alternating layers of differing soil material Scattered: Less than one per foot <br /> Pocket: Erratic,discontinuous deposit of limited extent Numerous: More than one per foot Bentonite grout/seal <br /> ' Homogeneous: Soil with uniform color and composition throughout BCN: Angle between bedding plane and a plane �� Silica sand backfll <br /> normal to core axis <br /> COMPONENT DEFINITIONS .��� Slottedtip <br /> N <br /> N COMPONENT SIZE/SIEVE RANGE COMPONENT SIZE/SIEVE RANGE '''� slough <br /> a <br /> � Boulder: � >12 inches Sand Bottom of Boring <br /> � Cobbles: � 3 to 12 inches Coarse Sand: � #4 to#10 sieve(4.5 to 2.0 mm) MOISTURE CONTENT <br /> 0 <br /> Z Gravel Medium Sand: : #10 to#40 sieve(2.0 to 0.42 mm) Dry Dusty,dry to the touch <br /> a Coarse Gravel: : 3 to 3/4 inches Fine Sand: #40 to#200 sieve(0.42 to 0.074 mm) Moist Damp but no visible water <br /> � Fine Gravel: � 3l4 inches to#4 sieve Silt � 0.074 to 0.002 mm Wet Visible free water <br /> � Clay � <0.002 mm <br /> 0 <br /> J <br /> �I <br /> wPanGEO Terms and Symbols for <br /> ; � N � o R P o R A T E o Boring and Test Pit Logs Figure A-1 <br /> o Phone: 206.262.0370 <br />