5001 23RD AVE W Geotech Report 2022-10-25

AMERICAN GEOSERVICES DESCRIPTIVE TERMINOLOGY & SOIL CLASSIFICATION UNIFIED SOIL CLASSIFICATION SYSTEM UNIFIED SOIL CLASSIFICATION AND SYMBOL CHART LABORATORY CLASSIFICATION CRITERIA COARSE-GRAINED SOILS (more than 50%of material is larger than No.200 sieve size.) Clean Gravels(Less than 5%fines) b 0 Well-graded gravels,gravel-sand Cu = D60 greater than 4;Cc = D30 between 1 and 3 GRAVELS 'AP GW mixtures,little or no fines GW D10 D10 x D60 More than 50% oo Gp Poorly-graded gravels,gravel-sand of coarse ,oS mixtures,little or no fines GP Not meeting all gradation requirements for GW frathanctionNo.larger Gravels with fines(More than 12%fines) 4 oti sieve size ) GM Silty gravels,gravel-sand-silt mixtures GM Atterberg limits below"A" Above"A"line with P.I. between line or P.I.less than 4 4 and 7 are borderline cases GC Clayey gravels,gravel-sand-clay GC Atterberg limits above"A" requiring use of dual symbols :3 mixtures line with P.I.greater than 7 Clean Sands(Less than 5%fines) D60 D SW Well-graded sands,gravelly sands, SW Cu = D greater than 4;Cc = D z D between 1 and 3 little or no fines 10 10 60 SANDS 50%or more ; Sp Poorly graded sands,gravelly sands, of coarse little or no fines Sp Not meeting all gradation requirements for GW fraction smaller Sands with fines(More than 12%fines) than No.4 A.sieve size SM Silty sands,sand-silt mixtures SM Atterberg limits below"A" Limits plotting in shaded zone line or P.I.less than 4 with P.I.between 4 and 7 are '';%i. borderline cases requiring use F SC Clayey sands,sand-clay mixtures SC Atterberg limits above"A" of dual symbols. line with P.I. greater than 7 FINE-GRAINED SOILS (50% or more of material is smaller than No.200 sieve size.) Determine percentages of sand and gravel from grain-size curve. Depending on percentage of fines(fraction smaller than No.200 sieve size), Inorganic silts and very fine sands,rock coarse-grained soils are classified as follows: SILTS ML flour,silty of clayey fine sands or clayey Less than 5 percent GW,GP,SW,SP AND silts with slight plasticity More than 12 percent GM,GC,SM,SC ire.;' 5 to 12 percent Borderline cases requiring dual symbols CLAYS V Inorganic clays of low to medium 4 g y Liquid limit %%? ' CL plasticity,gravelly clays,sandy clays, less than j silty clays,lean clays PLASTICITY CHART 50% =— OL Organic silts and organic silty clays of 60 low plasticity ii X Inorganic silts,micaceous or 50 r) MH diatomaceous fine sandy or silty soils,SILTS a CH AND elastic silts 40 A LINE: Z PI=0.734-20) CLAYS CH Inorganic clays of high plasticity,fat �. 30 CL MH`&OH Liquid limit clays t 50% U 20 I or greater avN y OH Organic clays of medium to high 10 plasticity,organic silts a cL+ML .ML&OL 1 I HIGHLY '"' 0 0 10 20 30 40 50 60 70 80 90 100 ORGANIC PT Peat and other highly organic soils LIQUID LIMIT(LL)(%) SOILS