3535 RIVERFRONT BLVD Geotech Report 2023-02-22

N 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) ° Consistency N(blows/ft) Undrained Shear LL=Liquid Limit Relative Density(/°) 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 Photoionization Device Reading MAJOR DIVISIONS GROUP DESCRIPTIONS PP Pocket Penetrometer Approx Compressive Strength(tsf) Gravel and Clean Gravel •'a GW Well-graded GRAVEL SG Specific Gravity Coarse TC Triaxial Compression Gravelly Soils V Grained (little or no fines) o TV Torvane Soils o C° GP Poorly-graded GRAVEL More than Approx Shear Strength(tsf) 50%of Coarse Gravel with o GM Silty GRAVEL UC Unconfined Compression Fraction Retained Fines(appreciable on No.4 Sieve amount of fines) GC Clayey GRAVEL SAMPLE TYPE SYMBOLS Sand and •Clean Sand .• •• SW Well-graded SAND El 2.0"OD Split Spoon(SPT) ASandy Soils (little or no fines) (140 lb.hammer with 30 in.drop) More than SP Poorly-graded SAND T 50%Retained 1 Shelby Tube on No. 50%or More Sand with • •• SM Silty SAND 200 Sieve of Coarse Fines(appreciable ,•`.• • 3-1/4"OD Split Spoon with Brass Rings Fraction Passing Size No.4 Sieve amount of fines) /;' SC Clayey SAND Q Small Bag Sample ML SILT Fine Silt it Large Bag(Bulk)Sample Liquid Limit J Grained and l�f� CL Lean CLAY Soils Clay Less than 50% l/fl IllCore Run OL Organic SILT/Organic CLAY 7 Non-standard Penetration Test (3.0"OD split spoon) MH Elastic SILT 50%or More Silt and Liquid Limit Passing Cla 50%or More CH Fat CLAY GROUNDWATER SYMBOLS No.200 Sieve y vv�s Q Groundwater Level(measured at Size OH Organic SILT/Organic CLAY time of drilling)�\��,1 Highly Organic Soils PT PEAT I Groundwater Level(measured in well or 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 in to 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) 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. PUBLIC AMENITIES LEGEND OF TERMS AND IIMI RIVERFRONT DEVELOPMENT SYMBOLS USED ON HWAGEOSQF.NCE$INC EVERETT, WASHINGTON EXPLORATION LOGS PROJECT NO.: 2015-061 FIGURE: A-1 LEGEND 2007-087.GPJ 6/26/12