5304 EAST DR Geotech Report 2022-10-25

Unified Soil Classification System (USCS) MAJOR DIVISIONS .YMBOL TYPICAL DESCRIPTION Clean Gravels � GW Well-graded gravels,gravels,gravel-sand mixtures,little or no fines Gravels (less than 5% ,€ GP (more than 5o% fines) f6 Poorly graded gravels,gravel-sand mixtures,little or no fines re.. of coarse fraction r retained on Noe 4 Gravels with GMSilty gravels,gravel-sand-silt mixtures COARSE sieve) Finesf more than 12% O� GC GRAINED ( ��. Clayey gravels,gravel-sand-clay mixtures SOILS fines) %4 (more than 50% sw Well-graded sands,gravellysands,little or no fines retained on Clean Sands � No.zoo sieve) Sands (less than 5% SP (5o%or more fines) Poorly graded sand,gravelly sands,little or no fines of coarse fraction passes the No.4 sM Sands with , Silty sands,sand-silt mixtures sieve) Fines (more than 12% sc fines) Clayey sands,sand-clay mixtures ML Inorganic silts of low to medium plasticity,sandy silts,gravelly silts, or clayey silts with slight plasticity Silts and Clays Inorganic r cL Inorganic clays of low to medium plasticity,gravelly clays,sandy clays (liquid limit less '' silty clays,lean clays FINE GRAINED than 5o) .._`- OL SOILS Organic Organic silts and organic silty clays of low plasticity (5o%or more passes the MH Inorganic silts,micaceous or diatomaceous fine sands or silty soils, No.200 sieve) elastic silt Silts and Clays Inorganic CH Inorganic clays of medium to high plasticity,sandy fat clay, (liquid limit 5o or or gravelly fat clay more) OH Organic Organic clays of medium to high plasticity,organic silts HIGHLY ORGANIC Primarily organic matter,dark in color, PT Peat,humus,swamp soils with high organic content(ASTM D4427) SOILS and organic odor Classification of Soil Constituents Grain Size Definitions Description Sieve Number and/or Size MAJOR constituents compose more than 5o percent, Fines <#zoo(0.08 mm) by weight,of the soil. Major constituents are capitalized Sand (i.e.,SAND). -Fine #20o to#40(o.08 to 0.4 mm) Minor constituents compose 12 to 50 percent of the soil -Medium #40 to Co(0.4 to 2 mm) and precede the major constituents(i.e.,silty SAND). Coarse #lo to#4(2 to 5 mm) Minor constituents preceded by"slightly"compose Gravel 5 to 12 percent of the soil(i.e.,slightly silty SAND). -Fine #4 to 3/4 inch(5 to 19 mm) Trace constituents compose o to 5 percent of the soil -Coarse 3/4 to 3 inches(19 to 76 min) (i.e.,slightly silty SAND,trace gravel). Cobbles 3 to 12 inches(75 to 305 mm) Boulders >12 inches(305 mm) Relative Density Consistency (Coarse Grained Soils) (Fine Grained Soils) N,SPT, Relative N,SPT, Relative Moisture Content Definitions Blows/FT Density Blows/FT Consistency o-4 Very loose Under 2 Very soft 4-lo Loose 2-4 Soft Dry Absence of moisture,dusty,dry to the touch 10-3o Medium dense 4-8 Medium stiff 3o-5o Dense 8-15 Stiff Moist Damp but no visible water Over 5o Very dense 15-3o Very stiff Wet Visible free water,from below water table Over 3o Hard Cobalt Geosciences,LLC x1' P.O.Box 82243 'ti= Kenmore,WA 98028 Soil Classification Chart Figure Ci �� (206)331-1097 COBALT www.cobaltgeo.com G E o S C I E N C E S ..cobaltgeoPgmail.com