3400 RIVERFRONT BLVD Geotech Report 2022-10-25

• • RELATIVE DENSITY - COARSE-GRAINED SOILS Standard Penetration Dames& Moore Sampler Dames& Moore Sampler • Relative Density Resistance (140-pound hammer) (300-pound hammer) • Very Loose 0-4 0- 11 0 -4 • Loose 4 - 10 1 1 - 26 4- 10 Medium Dense 10 - 30 26- 74 10- 30 • Dense 30 - 50 74- 120 30-47 • Very Dense More than 50 More than 120 More than 47 • CONSISTENCY - FINE-GRAINED SOILS . Consistency Standard Penetration Dames& Moore Sampler Dames& Moore Sampler Unconfined Compressive Resistance (140-pound hammer) (300-pound hammer) Strength (tsf) • Very Soft Less than 2 Less than 3 Less than 2 Less than 0.25 • Soft 2 -4 3 -6 2 - 5 0.25 - 0.50 • Medium Stiff 4- 8 6- 12 5 -9 0.50- 1.0 Stiff 8- 15 12 -25 9- 19 1.0- 2.0 • Very Stiff 15 - 30 25 -65 19- 31 2.0-4.0 • Hard More than 30 More than 65 More than 31 More than 4.0 • PRIMARY SOIL DIVISIONS GROUP SYMBOL GROUP NAME CLEAN GRAVELS •GW or GP GRAVEL GRAVEL (< 5%fines) • GRAVEL WITH FINES GW-GM or GP-GM GRAVEL with silt (more than 50%of • (> 5%and <_ 12%fines) GW-GC or GP-GC GRAVEL with clay coarse fraction • COARSE GRAINED retained on GRAVELS WITH FINES — GM silty GRAVEL SOILS No. 4 sieve) (> 12%fines) GC clayey GRAVEL • GC-GM silty, clayey GRAVEL . (more than 50% CLEAN SANDS retained on SAND (<5%fines) SW or SP SAND • No. 200 sieve) • SANDS WITH FINES SW-SM or SP-SM SAND with silt (50%or more of (> 5%and <_ 12%fines) SW-SC or SP-SC SAND with clay • coarse fraction passing SM silty SAND No. 4 sieve) SANDS WITH FINES SC clayey SAND • (> 12%fines) • SC-SM silty, clayey SAND ML SILT IIII FINE-GRAINED CL CLAY SOILS Liquid limit less than 50 CL-ML silty CLAY • (50%or more SILT AND CLAY OL ORGANIC SILT or ORGANIC CLAY . MH SILT passing Liquid limit 50 or • No. 200 sieve) CH CLAY greater OH ORGANIC SILT or ORGANIC CLAY • HIGHLY ORGANIC SOILS PT PEAT • MOISTURE ADDITIONAL CONSTITUENTS CLASSIFICATION • Secondary granular components or other materials • Term Field Test such as organics, man-made debris,etc. Silt and Clay In: Sand and Gravel In: • very low moisture, Percent Fine-Grained Coarse- Percent Fine-Grained Coarse • - dry dry to touch Soils Grained Soils Soils Grained Soils • damp,without < 5 trace trace < 5 trace trace- • moist visible moisture 5 - 12 minor with 5 - 15 minor minor wet visible free water, > 12 some silty/clayey 15 - 30 with with • usually saturated « > 30 sandy/gravelly Indicate% • GEODESIGNz • �55755W Sequoia Parkway Suite 100 SOIL CLASSIFICATION SYSTEM TABLE A-2 • Portland OR 97224 Off 503 968 8787 Fax 503.968.3068 • •