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s E GRAIN SIZE 0 O DESCRIPTION SIEVE SIZE GRAIN SIZE APPROXIMATE SIZE O m Boulders >12 in.(304.8 mm.) >12 in.(304.8 mm.) Larger than basketball-sized 2 a Cobbles 3-12 in.(76.2-304.8 mm.) 3-12 in.(76.2-304.8 mm.) Fist-sized to basketball-sized w coarse 3/4-3 in.(19-76.2 mm.) 3/4-3 in.(19-76.2 mm.) Thumb-sized to fist-sized o 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 c coarse #10-#4 0.079-0.19 in.(2-4.9 mm.) Rock salt-sized to pea-sized o Sand medium #40-#10 0.017-0.079 in.(0.43-2 mm.) Sugar-sized to rock salt-sized W 0 pfine #200-#40 0.0029-0.017 in.(0.07-0.43 mm.) Flour-sized to sugar-sized 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 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 Z5 to<15% z15 to<30% Visible free water, Will not crumble or Wet usually soil is beloA Strongly break with finger Modifier I z15% Z30% water table pressure CONSISTENCY-FINE-GRAINED SOIL REACTION WITH HYDROCHLORIC ACID SPT-N� Pocket Pen UNCONFINED CONSISTENCY (#blows/ft) Of) COMPRESSIVE VISUAL/MANUAL CRITERIA DESCRIPTION FIELD TEST STRENGTH(O,)(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 0.25 5 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 es Medium Stiff 4-8 0.5 S PP<1 1000-2000 Remolded by strong finger pressure. forming y Violent reaction, Stiff 8-15 1 5 PP<2 2000-4000 Can be imprinted with considerable pressure from thumb. Strong with bubbles forming O Thumb will not indent soil but readily indented with immediate) Y Very Stiff 15-30 2,PP<4 4000-8000 thumbnail. U O Hard >30 41 PP >8000 Thumbnail will not indent soil. tr APPARENT I RELATIVE DENSITY-COARSE-GRAINED SOIL PLASTICITY Lil LL PT N� MODIFIED CA CALIFORNIA RELATIVE DESCRIPTION LL Either the LL or the PI(or PI APPARENT SPT44 LL DENSITY (# ,ft) SAMPLER SAMPLER DENSITY both)may be used to (#blows/ft) (#blows/ft) (%) Non-Plastic NP describe the soil plasticity. NP > Very Loose <4 <4 <5 0-15 Low <3p T angel of numbers <15 W shown here do not imply U Loose 4-10 5-12 5-15 15-35 Medium 3()_50 that the LL ranges 15-25 U) correlate with the PI Medium Dense 10-30 12-35 15-40 35-65 High >50 >25 � 9 ranges for all soils. _< Dense 30-50 35-60 40-70 65-85 LL is from Casagrande,1948.PI is from Holtz,1959. O � w W Very Dense >50 >60 >70 85-100 lO J O O FROM TERZAGHI AND PECK,1948 N W STRUCTURE ANGULARITY u y w J 00 DESCRIPTION CRITERIA DESCRIPTION CRITERIA M Z Alternating layers of varying material or color with layers at Particles have sharp edges and relatively plane sides with unpolished I Stratified r- least 1/4-in.thick note thickness. Angular surfaces. W c0v Laminated Alternating layers of varying material or color with the layer p r less than 1/4-in.thick note thickness. Subangular Particles are similar to angular description but have rounded edges. a Breaks along definite planes of fracture with < Fissured little resistance to fracturing. Particles have nearly plane sides but havewell-foundedcomers and W Subrounded �r Slickensided Fracture planes appear polished or glossy,sometimes sMated. edges. Z Blocky Cohesive soil that can be broken down into small angular lumps Rounded Particles have smoothly curved sides and no edges. Cn which resist further breakdown. Lensed Inclusion of small pockets of different soils,such as small lenses < of sand scattered through a mass of da note thickness. Z PROJECT NO.: SOIL DESCRIPTION KEY FIGURE m Y ("KL 20210068.001A _r Ww E/NFEL DE DRAWN BY GG q_2 sl< D Hill Trucking W Bright People.Right Solutions. CHECKED BY: JW 28850 S Tracy Blvd LL Lu Tracy,California Z z DATE: 4/24/2020 rn rn