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N E GRAIN SIZE 0 C7 DESCRIPTION SIEVE SIZE GRAIN SIZE APPROXIMATE SIZE m Boulders >12 in.(304.8 mm.) >12 in.(304.8 mm.) Larger than basketball-sized CL Cobbles 3-12 in.(76.2-304.8 mm.) 3-12 in.(76.2-304.8 mm.) Fist-sized to basketball-sized v coarse 3/4 3 in.(19-76.2 mm.) 3/4 3 in.(19-76.2 mm.) Thumb-sized to fist-sized o Gravel N fine #4-3/4 in.(#4-19 mm.) 0.19-0.75 in.(4.8-19 mm.) Pea-sized to thumb-sized O Q coarse #10-#4 0.079-0.19 in.(2-4.9 mm.) Rock salt-sized to pea-sized 0 o Sand medium #40-#10 0.017-0.079 in.(0.43-2 mm.) Sugar-sized to rock salt-sized Lu o r fine #200-#40 0.0029-0.017 in.(0.07-0.43 mm.) Flour-sized to sugar-sized J CL Fines Passing#200 <0.0029 in.(<0.07 mm.) Flour-sized and smaller SECONDARY CONSTITUENT MOISTURE CONTENT CEMENTATION AMOUNT DESCRIPTION FIELD TEST DESCRIPTION FIELD TEST Absence of Crumbles or breaks Term Secondary Secondary Dry moisture,dusty, Weakly with handling or slight Of Constituent is Constituent is dry to the touch finger pressure Use Fine Grained Coarse Grained Damp but no Crumbles or breaks Moist visible water Moderately with considerable finger Trace <5% <15% pressure With a5 to<15% a15 to 30% Visible free water, Will not crumble or Wet usually soil is belo Strongly break with finger Modifier a15% 1 a30% water table pressure CONSISTENCY-FINE-GRAINED SOIL REACTION WITH SPT-N60Pocket Pen UNCONFINED HYDROCHLORIC ACID CONSISTENCY (#blows/ft) (tsf) COMPRESSIVE VISUAL/MANUAL CRITERIA DESCRIPTION FIELD TEST STRENGTH(Qu)(psf) Very Soft <2 PP<0.25 <500 Thumb will penetrate more than 1 inch(25 mm).Extrudes None No visible reaction between fingers when squeezed. Soft 2-4 0.255 PP<0.5 500-1000 Thumb will penetrate soil about 1 inch(25 mm). Remolded by light finger pressure. Some reaction, Weak with bubbles Medium Stiff 4-8 0.55 PP<1 1000-2000 Thumb will penetrate soil about 1/4 inch(6 mm). forming slowly Remolded by strong finger pressure. Violent reaction, Stiff 8-15 1;PP<2 2000-4000 Can be imprinted with considerable pressure from thumb. Strong with bubbles forming Zimmediate) O Thumb will not indent soil but readily indented with Y Very Stiff 15-30 2;PP<4 4000-8000 thumbnail. U O U) Hard >30 4;PP >8000 Thumbnail will not indent soil. W LU APPARENT/RELATIVE DENSITY-COARSE-GRAINED SOIL PLASTICITY LL Lu MODIFIED CA CALIFORNIA RELATIVE DESCRIPTION LL Either the LL or the PI(or pl U APPARENT SPT-Nso LL DENSITY (#blows/ft) SAMPLER SAMPLER DENSITY both)may be used to O (#blows/ft) (#blows/ft) N Non-Plastic NP describe the soil plasticity. NP wVery Loose <4 <4 <5 0-15 Low <30 The ranges of numbers <15 Y shown here do not imply 0 Loose 4-10 5-12 5-15 15-35 Medium 30-50 that the LL ranges 15-25 Lu correlate with the PI Medium Dense 10-30 12-35 15-40 35-65 High >50 ranges for all soils. >25 < Dense 30-50 35-60 40-70 65-85 LL is from Casagrande,1948.PI is from Holtz,1959. O N or-� w Very Dense >50 >60 >70 85-100 (O J o O FROM TERZAGHI AND PECK,1948 N w N �' STRUCTURE ANGULARITY Lu rr Y J DESCRIPTION CRITERIA DESCRIPTION CRITERIA � m Z Alternating layers of varying material or color with layers at Particles have sharpedges and relative) lane sides with unpolished Stratified Angularg y P P least 1/4-in.thick note thickness. surfaces. Lu o Alternating layers of varying material or color with the layer L N Laminated O >- less than 1/4-in.thick note thickness. Subangular Particles are similar to angular description but have rounded edges. a WBreaks along definite planes of fracture with Fissured little resistance tofracturing. Particles have nearly plane sides but have well-rounded comers and M Subrounded es. ed 7� Slickensided Fracture planes appear polished or glossy,sometimes striated. g zCohesive soil that can be broken down into small angular lumps Rounded Particles have smoothly curved sides and no edges. 0 Blocky which resist further breakdown. it Lensed Inclusion of small pockets of different soils,such as small lenses < of sand scattered through a mass of clay;note thickness. Z N, PROJECT No.: SOIL DESCRIPTION KEY FIGURE E� �� 20210067.001A Y I iu KLE/NFELDA DRAWN BY: GG CHECKED BY: JW S. B q_2 Lu Bright People.Right Solutions. SCK Air Cargo Facility Street and Earhart Avenue P �� Stockton,Califonria F- z DATE: 4/27/2020 m m