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IJ GRAIN SIZE G cD DESCRIPTION SIEVE SIZE GRAIN SIZE APPROXIMATE SIZE m Boulders >12 in.(304.8 mm.) >12 in.(304.8 mm.) Larger than basketball-sized Cobbles 3-12 in.(76.2-304.8 mm.) 3-12 in.(76.2-304.8 mm.) Fist-sized to basketball-sized M O r coarse 3/4-3 in.(19-76.2 mm.) 3l4-3 in.(19-76.2 mm.) Thumb-sized to fist-sized Q, Gravel o fine #4-3/4 in.(#4-19 mm.) 0.19-0.75 in.(4.8-19 mm.) Pea-sized to thumb-sized O coarse #10-#4 0.079-0.19 in.(2-4.9 mm.) Rock salt-sized to pea-sized o O o Sand medium #40-#10 0.017-0.079 in.(0.43-2 mm.) Sugar-sized to rock salt-sized o p fine #200-#40 0.0029-0.017 in.(0.07-0.43 mm.) Flour-sized to sugar-sized J a 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 Secondary Absence of Crumbles or breaks Term Secondary Constituent is Dry moisture,dusty, Weakly with handling or slight Constituent Coarse dry to the touch finger pressure Use Fine Grained Grained Damp but no Crumbles or breaks 0 o Moist visible water Moderately with considerable Trace <5% <15/ finger pressure With >_5 to<15% s 15 to<30% Visible free water, Will not crumble or Wet usually soil is Strongly break with finger Modifier z 15% _>30% below water table pressure CONSISTENCY-FINE-GRAINED SOIL REACTION WITH UNCONFINED HYDROCHLORIC ACID SPT-Nw Pocket Pen CONSISTENCY COMPRESSIVE VISUAL/MANUAL CRITERIA (#blows/ft) (tsf) STRENGTH(Q,)(psf) DESCRIPTION FIELD TEST Thumb will penetrate more than 1 inch(25 mm). Very Soft <2 PP<0.25 <500 e Extrudes between fingers when squeezed. None rvisible reaction Soft 2-4 0.25s PP<0.5 500-1000 Thumb will penetrate soil about 1 inch(25 mm). Remolded by light finger pressure. Some reaction, Thumb will penetrate soil about 1/4 inch 6 mm). Weak with bubbles Medium Stiff 4-8 0.5 s PP<1 1000-2000 p ( ) Remolded by strong finger pressure. forming slowly Violent reaction, Stiff 8-15 1<PP<2 2000-4000 g Can be imprinted with considerable pressure from Strong with bubbles thumb. forming o Thumb will not indent soil but readily indented with immediate) Y Very Stiff 15-30 2< PP<4 4000-8000 thumbnail. U Hard >30 45 PP >8000 Thumbnail will not indent soil. Lu FROM TERZAGHI AND PECK,1948;LAMBE AND WHITMAN,1969;FHWA,2002;AND ASTM D2488 r LL APPARENT/RELATIVE DENSITY-COARSE-GRAINED SOIL PLASTICITY Lu v MODIFIED CA CALIFORNIA RELATIVE DESCRIPTION LL FIELD TEST LL APPARENT SPT-N sa SAMPLER SAMPLER DENSITY O DENSITY (#blows/ft) A 1/8-in.(3 mm.)thread cannot be rolled at any water (#blows/ft) (#blows/ft) (/) Non-plastic NP content. YVery Loose <4 <4 <5 0-15 Low(L) <30 The thread can barely be rolled and the lump or thread cannot be formed when drier than the plastic limit. U) Loose 4-10 5-12 5-15 15-35 The thread is easy to roll and not much time is required to Medium(M) 30-50 reach the plastic limit. The thread cannot be rerolled Medium Dense 10-30 12-35 15-40 35-65 after reaching the plastic limit. The lump or thread < n crumbles when drier than the plastic limit. o w Dense 30-50 35-60 40-70 65-85 It takes considerable time rolling and kneading to reach othe plastic limit. The thread can be rerolled several times rLU Very Dense >50 >60 >70 85-100 High(H) >50 after reaching the plastic limit. The lump or thread can be 00 o LU formed without crumbling when drier than the lastic limit. N FROM TERZAGHI AND PECK,1948 STRUCTURE ANGULARITY J Lu Y 07 DESCRIPTION CRITERIA DESCRIPTION CRITERIA 5m zJ Alternating layers of varying material or color with layers at Particles have sharp edges and relative) lane sides with cD Stratified rP 9 Y P least 1/4-in.thick note thickness. Angular o unpolished surfaces. w o Alternating layers of varying material or color with the layer Laminated less than 1/4-in.thick note thickness. Particles are similar to angular description but have rounded o i Subangular Of Fissured Breaks along definite planes of fracture with edges. little resistance to fracturing. XSubrounded Particles have nearly plane sides but have well-rounded comers Ml Slickensided Fracture planes appear polished or glossy,sometimes striated. and edges. Z Blocky Cohesive soil that can be broken down into small angular lumps Rounded Particles have smoothly curved sides and no edges. r, which resist further breakdown. Lensed Inclusion of small pockets of different soils,such as small lenses a of sand scattered through a mass of clay;note thickness. o O 6 (n PROJECT SOIL DESCRIPTION KEY FIGURE J' 20200144.002A E Y —1 W fLU Q KL E/NFEL DER DRAWN BY: GG Escalon Ag Farm Complex /�-2 w Bright People.Right Solutions. CHECKED BY: AA 17950 S Van Allen Road M Escalon,California Z z DATE: 8/12/2019 rn m