7505 SEAWAY BLVD Geotech Report 2022-10-25

RELATIVE DENSITY OR CONSISTENCY VERSUS SPT N-VALUE TEST SYMBOLS COHESIONLESS SOILS COHESIVE SOILS %F Percent Fines Approximate Approximate AL Atterberg Limits: PL=Plastic Limit Density N(blows/ft) Relative Density(%) Consistency N(blows/ft) Undrained Shear LL=Liquid Limit Strength(psf) CBR California Bearing Ratio Very Loose 0 to 4 0 - 15 Very Soft 0 to 2 <250 CN Consolidation Loose 4 to 10 15 - 35 Soft 2 to 4 250 - 500 DD Dry Density(pcf) Medium Dense 10 to 30 35 - 65 Medium Stiff 4 to 8 500 - 1000 DS Direct Shear Dense 30 to 50 65 - 85 Stiff 8 to 15 1000 - 2000 GS Grain Size Distribution Very Dense over 50 85 - 100 Very Stiff 15 to 30 2000 4000 K Permeability Hard over 30 >4000 MD Moisture/Density Relationship(Proctor) USCS SOIL CLASSIFICATION SYSTEM MR Resilient Modulus PID Photoionization Device Reading MAJOR DIVISIONS GROUP DESCRIPTIONS PP Pocket Penetrometer Approx Compressive Strength(tsf) •Gravel and ,I.GW SG Specific Gravity Well-graded GRAVEL Coarse Clean Gravel TC Triaxial Compression Gravelly Soils Grained (little or no fines) o TV Tonrane Soils o be GP Poorly-graded GRAVEL Approx Shear Strength(tsf) More than 50%of Coarse Gravel with a o GM Silty GRAVEL UC Unconfined Compression Fraction Retained Fines(appreciable ` on No.4 Sieve amount of fines) Jeg GC Clayey GRAVEL SAMPLE TYPE SYMBOLS Sand andClean Sand °. SW Well-graded SAND ® 2.0"OD Split Spoon(SPT) Sandy Soils (little or no fines) (140 lb.hammer with 30 in.drop) More than .'• SP Poorly-graded SAND T 50%Retained 1 Shelby Tube 50%or More on No. of Coarse Sand with SM Silty SAND • 3-1/4"OD Split Spoon with Brass Rings 200 Sieve Fines(appreciable Fraction Passing Size No.4 Sieve amount of fines) !!' : SC Clayey SAND 0 Small Bag Sample ML SILT Fine Silt il Large Bag(Bulk)Sample Grained and Liquid Limit Less than 50% / CL Lean CLAY Ill Core Run Soils l Clay -_ OL Organic SILT/Organic CLAY Z Non-standard Penetration Test ___ _ (3.0"OD split spoon) MH Elastic SILT 50%or More Silt Liquid Limit and CH Fat CLAY GROUNDWATER SYMBOLS Passing Cla 50%or More No.200 Sieve y Size w OH Organic SILT/Organic CLAY Groundwater Level(measured at a time of drilling) Highly Organic Soils / PT PEAT 1 Groundwater Level(measured in well or 4 0 r open hole after water level stabilized) COMPONENT DEFINITIONS COMPONENT PROPORTIONS COMPONENT SIZE RANGE PROPORTION RANGE DESCRIPTIVE TERMS Boulders Larger than 12 in <5% Clean Cobbles 3 in to 12 in Gravel 3 in to No 4(4.5mm) Coarse gravel 3 in to 3/4 in 5-12% Slightly(Clayey,Silty,Sandy) Fine gravel 3/4 into No 4(4.5mm) Sand No.4(4.5 mm)to No.200(0.074 mm) 12-30% Clayey,Silty,Sandy,Gravelly Coarse sand No.4(4.5 mm)to No.10(2.0 mm) Medium sand No.10(2.0 mm)to No.40(0.42 mm) 30-50% Very(Clayey,Silty,Sandy,Gravelly) Fine sand No.40(0.42 mm)to No.200(0.074 mm) Silt and Clay Smaller than No.200(0.074mm) I Components are arranged in order of increasing quantities. NOTES: Soil classifications presented on exploration logs are based on visual and laboratory observation. Soil descriptions are presented in the following general order. MOISTURE CONTENT Density/consistency,color,modifier(if any)GROUP NAME,additions to group name(if any),moisture DRY Absence of moisture,dusty, content. Proportion,gradation,and angularity of constituents,additional comments. dry to the touch. (GEOLOGIC INTERPRETATION) MOIST Damp but no visible water. Please refer to the discussion in the report text as well as the exploration logs for a more WET Visible free water,usually complete description of subsurface conditions. soil is below water table. LEGEND OF TERMS AND MISeaway Transit Facility SYMBOLS USED ON Community Transit HWAGEOSCIENCES INC Everett, Washington EXPLORATION LOGS PROJECT NO.: 2014-117-21 FIGURE: A-1 LEGEND 2014-117-21.GPJ 3/3/16