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Soil Classification System uSCS MAJOR GRAPHIC LETTER TYPICAL DIVISIONS SYMBOL SYMBOL DESCRIPTIONSf 1121 u U u D GRAVEL AND CLEAN GRAVEL jro 0 0 0 a: GW Well-graded gravel;graveVsand mixture(s);little or no fines GRAVELLY SOIL (Little or no fines) 0.0 0°o: OP Poorly graded gravel;gravel/sand mixture(s);little or no fines O:�•N 0 ° 0 CO— ° (More than 50%of t I o GRAVEL WITH FINES ;:. ;.:.;:. GM Silty gravel;graveVsand/silt mixture(s) coarse fraction retained W E'y (Appreciable amount of Z,�o on No.4 sieve) o .. Q o N fines) �if i GC Clayey gravel;gravel/sandfclay mixture(s) C0� ° z SW Well-graded sand;gravelly sand;little or no fines w F c SAND AND CLEAN SAND U.c L SANDY SOIL (Little or no fines) Qa, SP Poorly graded sand;gravelly sand;little or no fines 0 OU @ (More than 50%of • SM Silty sand;sand/silt mixture(s) coarse fraction passed SAND WITH FINES 1 through No.4 sieve) (Appreciable amount of fines) SC Clayey sand;sand/clay mixture(s) Inorganic fi —1 m 1 SILT AND CLAY ?-1 ML sand or clayeysiltand silt withveryslightne plasticitysand;rock flour;silty or clayey fine p a3 N CL Inorganic clay of low to medium plasticity;gravelly clay;sandy coco N• ELiquid limit less than 50) clay;silty clay;lean clay L. ° d OL Organic silt;organic,silty clay of low plasticity zo z,F —. Vrsol CD SILT AND CLAY MH Inorganic silt;micaceous or diatomaceous fine sand W d m CH Inorganic clay of high plasticity;fat clay Z 0 E (Liquid limit greater than 50) -') OH Organic clay of medium to high plasticity;organic silt HIGHLY ORGANIC SOIL PT Peat;humus;swamp soil with high organic content v GRAPHIC LETTER OTHER MATERIALS SYMBOL SYMBOL TYPICAL DESCRIPTIONS PAVEMENT AC or PC Asphalt concrete pavement or Portland cement pavement ROCK 4.Am. 4s, RK Rock(See Rock Classification) WOOD 99V view' WD Wood,lumber,wood chips DEBRIS ' DB Construction debris,garbage Notes: 1. Soil descriptions are based on the general approach presented in the Standard Practice for Description and Identification of Soils(Visual-Manual Procedure), as outlined in ASTM D 2488.Where laboratory index testing has been conducted,soil classifications are based on the Standard Test Method for Classification of Soils for Engineering Purposes,as outlined in ASTM D 2487. 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 follows: 1 Primary Constituent: >50%-"GRAVEL,""SAND,""SILT,""CLAY,"etc. Secondary Constituents: >30%and<50%-"very gravelly,""very sandy,""very silty,"etc. >12%and<30%-"gravelly,""sandy,""silty,"etc. Additional Constituents: > 5%and<12%-"slightly gravelly,""slightly sandy,""slightly silty,"etc. < 5%-"trace gravel,""trace sand,""trace silt,'etc.,or not noted. Drilling and Sampling Key Field and Lab Test Data SAMPLE NUMBER&INTERVAL SAMPLER TYPE Code Description Code Description 1Sample Identification Number a 3.25-inch O.D.,2.42-inch I.D.Split Spoon PP=1.0 Pocket Penetrometer,tsf b 2.00-inch O.D.,1.50 inch I.D.Split Spoon TV=0.5 Torvane,tsf f----- Recovery Depth Interval c Shelby Tube PID=100 Photoionization Detector VOC screening,ppm 1-j 1 14— Sample Depth Interval d Grab Sample W=10 Moisture Content, ITT a Other-See text if applicable D=120 Dry Density,pcf "- Portion of Sample Retained 1 300-lb Hammer,30-inch Drop =60 Material_smallerthan No.200 sieve, for Archive or Analysis 2 140-lb Hammer,30-inch Drop GS Grain Size-See separate figure for data 3 Pushed AL Atterberg Limits-See separate figure for data 4 Other-See text if applicable GT Other Geotechnical Testing Groundwater CA Chemical Analysis 2 Approximate water elevation at time of drilling(ATD)or on date noted. Groundwater ATD levels can fluctuate due to precipitation,seasonal conditions,and other factors. Proposed Building Figure oG OTG 5TDevelopment Soil Classification System and Key A 3313 Oakes Avenue 4 1 Everett, WA