1810 104TH ST SE A T AND T WIRELESS ANTENNA 2022-12-02

UNIF :--:) SOIL CLASSIFICATION S+EM Soil Classification Criteria for Assigning Group Symbols and Group Names Using Laboratory Tests A Group Group Name Symbol Gravels: Clean Gravels: Cu>_4 and 1 <Cc<3 E GW Well graded gravel F More than 50%of Less than 5%fines c Cu<4 and/or 1>Cc>3 F GP Poorly graded gravel F --— coarse fraction retained Gravels with Fines: Fines classify as ML or MH GM Silty gravel Coarse Grained Soils: on No.4 sieve More than 12%fines c Fines classify as CL or CH GC Clayey gravel ' ' More than 50%retained - on No.200 sieve Sands: Clean Sands: Cu>_6 and 1 <_Cc<3 e SW Well-graded sand' 50%or more of coarse Less than 5%fines° Cu<6 and/or 1>Cc>3 e SP Poorly graded sand' fraction passes No.4 Sands with Fines: Fines classify as ML or MH SM Silty sand c'H" sieve More than 12%fines° Fines classify as CL or CH SC Clayey sand c'"'' PI>7 and plots on or above"A"line CL Lean clayKLM Inorganic: - Silts and Clays: PI<4 or plots below"A"line� ML Silt K-�•M Liquid limit less than 50 Liquid limit-oven dried Organic clayK,L.M,N Fine-Grained Soils: Organic: <0.75 OL K,L,M,O Liquid limit-not dried Organic silt 50%or more passes the -Inorganic: K L M No.200 sieve PI plots on or above"A"line CH Fat clay ' ' Silts and Clays: PI plots below"A"line MH Elastic SiItK,L,M Liquid limit 50 or more Liquid limit-oven dried Organic clayK,L,M,P Organic: <0.75 OH K,L,M,O Liquid limit-not dried Organic silt Highly organic soils: Primarily organic matter, dark in color,and organic odor PT 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. j If Atterberg limits plot in shaded area,soil is a CL-ML,silty clay. c 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 °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 30)Z "PI>_4 and plots on or above"A"line. E Cu=D60010 Cc= °PI<4 or plots below"A"line. D10 x D60 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. G If fines classify as CL-ML,use dual symbol GC-GM,or SC-SM. 60 For classification of fine-grained soils and fine-grained fraction 50 of coarse-grained soils Equation of"A/20 CL Horizontal at 5.5. X 40 then PI=0.7 .' Q W �t p Equation of'"U .'Vertical at LL ,�f '�30 then PI=0.9r -QV++rJ) 20 —G� Q MH or OH d 1a 7 __ _ 4 - L' ML or OL o 0 10 16 20 30 40 50 60 70 80 90 100 110 LIQUID LIMIT (LL) Irerracon Exhibit C-2