8417 EVERGREEN WAY Geotech Report 2022-10-25

UNIFIED SOIL CLASSIFICATION SYSTEM Soil Classification Criteria for AssigningGroup Symbols and Group Names Using Laboratory Tests A GrouP e Group Name Gravels: Clean Gravels: 1 Cu>_4 and 1 <Cc<_3 GW Well-graded gravel 4 _ More than 50%of Less than 5%fines Q Cu<4 and/or 1>Cc>3 E 1 GP Poorly graded gravel" coarse fraction retained Gravels with Fines: Fines classify as ML or MH GM Silty gravel F.G" Coarse Grained Soils: on No.4 sieve More than 12%fines Q Fines classify as CL or CH GC Clayey gravel F,G," More than 50%retained -- on No.200 sieve Sands: Clean Sands: I Cu>_6 and 1 <Cc<3 E SW ,Well-graded sand' 50%or more of coarse Less than 5%fines Q Cu<6 and/or 1 >Cc>3 E SP f Poorly graded sand' fraction passes No.4 Sands with Fines: Fines classify as ML or MH SM ,Silty sand G,".' sieve More than 12%fines D Fines classify as CL or CH SC Clayey sand G'"'' PI>7 and plots on or above"A"line CL Lean clayK'L'M Inorganic: K,L,M Silts and Clays: PI<4 or plots below"A"line ML Silt Liquid limit less than 50 ! ,Liquid limit-oven dried I Organic clay K,L,M," Fine-Grained Soils: I Organic: <0.75 's OL K L M o Liquid limit not dried ; -- Organic silt '' ' 50%or more passes the I ,PI plots on or above"A"line CH ;Fat clayK,L'M No.200 sieve I Inorganic: ! ---- —----- Silts and Clays: I PI plots below"A"line MH ;Elastic Silt K,L,M Liquid limit 50 or more f i Liquid limit-oven dried ( l Organic clay K,L,M,P IOrganic: <0.75 OH KLMQ '— Liquid limit-not dried !Organic silt K.L." I Highly organic soils: I Primarily organic matter,dark in color,and organic odor I PT I Peat---- — A Based on the material passing the 3-inch(75-mm)sieve "If fines are organic,add"with organic fines"to group name. B If field sample contained cobbles or boulders,or both,add"with cobbles ' If soil contains>_15%gravel,add"with gravel"to group name. or boulders,or both"to group name. '1 If Atterberg limits plot in shaded area,soil is a CL-ML,silty clay. Q Gravels with 5 to 12%fines require dual symbols: GW-GM well-graded K If soil contains 15 to 29%plus No.200,add"with sand"or"with gravel," gravel with silt,GW-GC well-graded gravel with clay,GP-GM poorly whichever is predominant. graded gravel with silt,GP-GC poorly graded gravel with clay. L If soil contains>_30%plus No.200 predominantly sand,add"sandy"to D Sands with 5 to 12%fines require dual symbols: SW-SM well-graded group name. sand with silt,SW-SC well-graded sand with clay,SP-SM poorly graded M If soil contains>_30%plus No.200,predominantly gravel,add sand with silt,SP-SC poorly graded sand with clay "gravelly"to group name. D z "PI>_4 and plots on or above"A"line. E Cu=D60/Di0 Cc= ( ao) o PI<4 or plots below"A"line. D10 x D80 P PI plots on or above"A"line. F If soil contains>_15%sand,add"with sand"to group name. °PI plots below"A"line. Q If fines classify as CL-ML,use dual symbol GC-GM,or SC-SM. For classification offine-grained 1 soils and fine-grained fraction ,`r 50 - of coarse-grained soils Equation of"A"-line .+:1,t? gP CT Horizontal at Pl 4 to LL.=fib 5 1 X 40 . then P1=0.73(L1,-20) �.. .__ '0 .. i C Equation of~'U"-line Z 'Vertical at LL=16 to Pt=7, / co 30 < then P1=0.9(LL-8) �. i i f , c 20 v_._ -_. _. _ ...w _ i '_._.G`v _.... . ..:_ __.w.__#_ t } MHorOH 1 r 7 �- 4 °L NIL orOL ' # 0 r _. 0 10 16 20 30 40 50 60 70 80 90 100 110 LIQUID LIMIT(LL) iierracon Exhibit C-2