2022-12-16_PERMIT FILE - M2021067

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UNIFIED SOIL CLASSIFICATION SYSTEM Soil Classification Group Group Name Criteria for Assigning Group Symbols and Group Names Using Laboratory Tests Symbol Coarse-Grained Soils Gravels more than Clean Gravels Less Cu24 and 1<Cc53E GW Well-graded gravel r more than 50% 50%of coarse than 5%fines retained on No.200 fraction retained on Cu<4 and/or 1>Cc>3E GP Poorly-graded gravel F sieve No.4 sieve Gravels with Fines a,H Fines classify as ML or MH GM Silty gravel more than 12% fines Fines Classify as CL or CH GC Clayey Gravel F,a," Sands 50%or more Clean Sands Less Cu26 and 1<Cc53E SW Well-graded sand coarse fraction than 5%fines passes No.4 sieve Cu<6 and/or i>Cc>3E SP Poorly-graded sand Sands with Fines Fines classify as ML or MH SM Silty sand 6 H more than 12% fines Fines classify as CL or CH SC Clayey sand Fine-Gralned Soils Silts and Clays inorganic K4M PI>7 and plots on or above"A"Line CL Lean clay 50%or more passes Liquid limit less the No.200 sieve than 50 Pi<4 or plots below"A"Line ML Silt organic Liquid Limit-oven dried Organic clay 9,4M,N <0.75 OL Liquid Limit-not dried Organic silt Ki M•o Silts and Clays inorganic PI plots on or above"A"Line CH Fat clay Koss Liquid Limit 50 or more PI plots below"A"Line MH Elastic Silt KU" organic Liquid Limit-oven dried Organic clay MlmlP <0.75 OH Liquid Limit-not dried Organic silt K"10 Highly organic soils Primarily organic matter,dark in color,and organic odor PT Peat "Based on the material passing the 3-1n.(75-mm) r = Cu=Dw/D�Cc- (DD0) Kif soil contains 15 to 29%plus No.200,add"with sand" sieve D1.x Dw or"with gravel",whichever is predominant, sif field sample contained cobbles or boulders,or rlf soil contains t 30%plus No.200 predominantly sand, both,add"with cobbles or boulders,or both"to add"sandy"to group name. group name. 'if soil contains a15%sand,add"with sand"to Mif soil contains 230%plus No.200 predominantly gravel, `Gravels with 5 to 12%fines required dual symbols: sit fines classify as CL-ML,use dual symbol GC- add"gravelly"to group name. GW-GM well graded gravel with sift CM,or SC-SM. "PI2:4 and plots on or above"A"line. GW-GC well-graded gravel with day "If fines are organic,add"with organic fines"to °PIS4 or plots below"A"line. GP-GM poorly-graded gravel with sift group name °PI plots on or above"A"line. GP-GC poorly-graded gravel with day 'If soil contains>15%gravel,add"with gravel"to "PI plots below"A"line. "Sands with 5 to 12%fines require dual symbols: group name SW-SM well-graded sand with sift If Atterberg limits plots shaded area,soil Is a CL- SW-SC well-graded sand with day ML,Silty day SP-SM poorly graded sand with silt SP-SC poorly graded sand with clay 60 For Classification of fine-grained soils and fine-grained fraction of coarse-grained 50 soils, Equation of"A"Ane a 40 Horizontal at Pk4 to LL=255 W then PI-0.73(LL-20) Z Equation of"U"Ifne 30 Vertical at LL=16 to PI-7, �j then PI--0.9(LL-8) a 20 p� MH at OH 10 ow ,lab I ML 40L 0 0 10 20 30 40 5o 60 70 80 90 100 110 LIQUID LIMIT(LL) Earth Engineering Consultants,LLC