7423 LOWER RIDGE RD 2024-10-25 - Laserfiche WebLink

• • Unified Soil Classification System (USCS) MAJOR DIVISIONS SYMBOL TYPICAL DESCRIPTION 1,cw Clean Gravels I Well-graded gravels,gravels,gravel-sand mixtures,little or no fines i Gravels (less than 5% I cP (more than 5o% fines) Poorly graded gravels,gravel-sand mixtures,little or no fines of coarse fraction — - GM retained on No.4 Gravels with Silty gravels,gravel-sand-silt mixtures COARSE sieve) Fines GRAINED (more than 12% GC SOILS fines) Clayey gravels,gravel-sand-clay mixtures (more than 5o% - 1 sw - retained on Clean Sands Well-graded sands,gravelly sands,little or no fines No.200 sieve) I Sands (less than 5% SP (5o%or more fines) Poorly graded sand,gravelly sands,little or no fines of coarse fraction the No. g sM passes 4 Sands with Silty sands,sand-silt mixtures sieve) Fines (more than 12% SC fines) Clayey sands,sand-clay mixtures MI-- Inorganic silts of low to medium plasticity,sandy silts,gravelly silts, Silts and Clays Inorganic or clayey silts with slight plasticity CL Inorganic clays of low to medium plasticity,gravelly clays,sandy clays (liquid limit less silty clays,lean clays FINE GRAINED than 50) SOILS OL (So%or more _ Organic Organic silts and organic silty clays of low plasticity passes the MH Inorganic silts,micaceous or diatomaceous fine sands or silty soils, No.200 sieve) elastic silt Silts and Clays Inorganic CH (liquid limit 5o or Inorganic clays of medium to high plasticity,sandy fat clay, more) or gravelly fat clay 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(0.08 to 0.4 mm) Minor constituents compose 12 to 5o percent of the soil -Medium #40 to#10(0.4 to 2 mm) and precede the major constituents(i.e.,silty SAND). -Coarse #10 to#4(2 to 5 mm) Minor constituents preceded by"slightly"compose 5 to 12 percent of the soil(i.e.,slightly silty SAND). Gravel -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 mm) (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 Blows/FT Density Blows/FT Consistency Moisture Content Definitions 4- o loose Under 2 Very soft 4-10 Loose 2Dry Absence of moisture,dusty,dry to the touch 2-4 Soft 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 Over 3o Hard Wet Visible free water,from below water table iiii Cobalt Geosciences,LLC P.O.Box 82243 Kenmore,WA 98028(206)331-1097 Soil Classification Chart Figure Ci COBALT www.cobaltgeo.com GE O S C I E N C E S cobaltgeoPgmail.com