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MAJOR
<br />DIVISIONS
<br />Soil Classification System
<br />uscS
<br />GRAPHIC LETTER TYPICAL
<br />SYMBOL SYMBOL DESCRIPTIONS"112)
<br />CLEAN GRAVEL
<br />���%
<br />GW
<br />Well -graded gravel; gravel/sand mixture(s); little or no fines
<br />GRAVEL AND
<br />'.i`,'� �':
<br />GP
<br />N N
<br />GRAVELLY SOIL
<br />(Little or no fines)
<br />Poorly graded gravel; gravel/sand mixture(s); little or no fines
<br />O Co .N
<br />,,. .
<br />GRAVEL WITH FINES
<br />•►'�
<br />,..;..
<br />♦.• t.•
<br />GM
<br />.�
<br />(More than 50% of
<br />Silty gravel; gravel/sand/silt mixture(s)
<br />W E'er
<br />Z o o
<br />coarse fraction
<br />retained on No. 4
<br />(Appreciable amount of
<br />fines)
<br />Clayey
<br />t.. t.• t.r
<br />,�.� ,� t ,, t
<br />GC
<br />00
<br />Q \ N
<br />sieve)
<br />�..�.••
<br />.�•�,�•�,�
<br />gravel; gravel/sand/clay mixture(s)
<br />o
<br />CLEAN SAND
<br />SW
<br />Well -graded sand; gravelly sand; little or no fines
<br />w
<br />SAND AND
<br />SIP
<br />N
<br /><-
<br />SANDY SOIL
<br />(Little or no fines)
<br />Poorly graded sand; gravelly sand; little or no fines
<br />Q $�
<br />SAND WITH FINES
<br />$M
<br />L
<br />( More than 50% of
<br />coarse fraction passed
<br />Silty sand; sand/silt mixture(s)
<br />SC
<br />through No. 4 sieve)
<br />(Appreciable amount of
<br />Clayey sand; sand/clay mixture(s)
<br />fines)
<br />"
<br />Inorganic silt and very fine sand; rock flour; silty or clayey fine
<br />�
<br />SILT AND CLAY
<br />sand or clayey silt with slight plasticity
<br />/%;:-!;, ,, '
<br />CL
<br />o
<br />p @ N
<br />Inorganic clay of low to medium plasticity; gravelly clay; sandy
<br />(n E d
<br />0 Z
<br />(Liquid limit less than 50)
<br />'�� -����%
<br />clay; silty clay; lean clay
<br />wQL
<br />Organic silt; organic, silty clay of low plasticity
<br />o L a�
<br />�to`m a>>
<br />MH
<br />Inorganic silt; micaceous or diatomaceous fine sand
<br />U L m .N
<br />SILT AND CLAY
<br />CH
<br />Z d in
<br />Inorganic clay of high plasticity; fat clay
<br />o N
<br />u_ g -
<br />(Liquid limit greater than 50)
<br />QH
<br />Organic clay of medium to high plasticity; organic silt
<br />HIGHLY ORGANIC SOIL
<br />$ -
<br />PT
<br />Peat; humus; swamp soil with high organic content
<br />GRAPHIC LETTER
<br />OTHER MATERIALS SYMBOL SYMBOL TYPICAL DESCRIPTIONS
<br />PAVEMENT
<br />AC or PC
<br />Asphalt concrete pavement or Portland cement pavement
<br />ROCK
<br />RK
<br />Rock (See Rock Classification)
<br />WOOD
<br />WD
<br />Wood, lumber, wood chips
<br />DEBRIS
<br />DB
<br />Construction debris, garbage
<br />Notes: 1. Soil descriptions are based on the general approach presented in the Standard Practice for Description and Identification of Soils (Visual -Manual
<br />Procedure), as outlined in ASTM D 2488. Where laboratory index testing has been conducted, soil classifications are based on the Standard Test Method
<br />for Classification of Soils for Engineering Purposes, as outlined in ASTM D 2487.
<br />2. Soil description terminology is based on visual estimates (in the absence of laboratory test data) of the percentages of each soil type and is defined as
<br />follows:
<br />Primary Constituent: > 50% - "GRAVEL," "SAND," "SILT," "CLAY," etc.
<br />Secondary Constituents: > 30% and < 50% - "very gravelly," "very sandy," "very silty," etc.
<br />> 12% and < 30% - "gravelly," "sandy," "silty," etc.
<br />Additional Constituents: > 5% and < 12% - "slightly gravelly," "slightly sandy," "slightly silty," etc.
<br />< 5% - "trace gravel," "trace sand," "trace silt," etc., or not noted.
<br />Drilling and Sampling Key
<br />Field and Lab Test Data
<br />SAMPLE NUMBER & INTERVAL SAMPLER TYPE
<br />Code Description
<br />Code
<br />Description
<br />Sample Identification Number a 3.25-inch O.D., 2.42-inch I.D. Split Spoon
<br />PP = 1.0
<br />Pocket Penetrometer, tsf
<br />b 2.00-inch O.D., 1.50-inch I.D. Split Spoon
<br />TV = 0.5
<br />Torvane, tsf
<br />�— Recovery Depth Interval c Shelby Tube
<br />PID = 100
<br />Photoionization Detector VOC screening, ppm
<br />1� 14- Sample Depth Interval d Grab Sample
<br />W = 10
<br />Moisture Content, %
<br />J e Other - See text if applicable
<br />D = 120
<br />Dry Density, pcf
<br />Portion of Sample Retained 1 300-lb Hammer, 30-inch Drop
<br />-200 = 60
<br />Material smaller than No. 200 sieve, %
<br />for Archive or Analysis 2 140-lb Hammer, 30-inch Drop
<br />GS
<br />Grain Size - See separate figure for data
<br />3 Pushed
<br />AL
<br />Atterberg Limits - See separate figure for data
<br />4 Other - See text if applicable
<br />GT
<br />CA
<br />Other Geotechnical Testing
<br />Chemical Analysis
<br />Groundwater
<br />V Approximate water elevation at time of drilling (ATD) or on date noted. Groundwate
<br />ATD levels can fluctuate due to precipitation, seasonal conditions, and other factors.
<br />M
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