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TERM�AND SYMBOLS USED ON BONG LOGS SOIL TYPES SAMPLER TYPES Sand ® Silt ® Clay Grovel Thin- NN Auger Inner 6c 7.beN TuI^I Silty Sandy Sandy ® Peat or Sand Silt Clay Highly Organic Split- Rock No Cloyey Cioyes, Silty Debris barrel Core Recovery Sand Silt ® Clay Fill SOIL GRAIN SUE I' U.S.STANDARD STEVE 6' 3' 34' 4 10 40 200 BOULDERS COBBLES 1 GRAVEL I SAND SILT CLAY COARSE I FINE I COARSE I MEDIUM FINE 152 76.2 19.1 4.76 2.00 0.420 0.074 0.002 SOIL GRAIN SIZE IN MILOMETERS STRENGTH OF COHESIVE SOILS(1) DENSITY OF GRANULAR SO1LS(2.3) Undrained Shear Strength, Descriptive *Relative Consistency Kips Per Sq Ft Term Density,% Very Soft .....................less than 0.25 Very Loose .................... less than 15 Soft ........................... 0.25 to 0.50 Loose ............................ 15 to 35 Finn .......................... 0.50 to 1.00 Medium Dense .................... 35 to 65 s Stiff ........................... 1.00 to 2.00 Dense ............................ 65 to 85 Very Stiff ...................... 2.00 to 4.00 Very Dense .................greater than 85 Hard ......................greater than 4.00 *Estimated from sampler driving record SPLIT-BARREL SAMPLER DRIVING RECORD Blows Per Foot Description 25 ............................................ 25 blows drove sampler 12 inches,after initial 6 inches of seating. 50/7".......................................... 50 blows drove sampler 7 inches,after initial 6 inches of seating. Ref/3................. ......................... 50 blows drove sampler 3 inches during initial 6-inch seating interval. Note : To avoid damage to sampling tools,driving is limited to 50 blows during or after seating interval. SOIL STRUCTURE(1) Slickensided............. Having planes of weakness that appear slick and glossy.The degree of skkensidedness depends upon the spacing of slickensides and the ease of breaking along these planes. Fissured ................ Containing shrinkage or relief cracks,often filled with fine sand or silt;usually more or less vertical. Pocket ................. Inclusion of material of different texture that is smaller than the diameter of the sample. Parting ................. Inclusion less than 1/8 inch thick extending through the sample. Seam................... Inclusion 1/8 inch to 3 inches thick extending through the sample. Layer .................. Inclusion greater than 3 inches thick extending through the sample. Laminated ...............Soil sample composed of alternating partings or seams of different soil type. Interlayered ............. Soil sample composed of aftemating layers of different soil type. Intermixed .............. Soil sample composed of pockets of different soil type and layered or laminated structure is not evident. Calcareous.............. Having appreciable quantities of carbonate. REFERENCES: Infornotion on each boring log is a compilation o/ subsurface conditions and soil or rock (1) ASTM D 2488 classifications obramed from the field as wellos from laboratorytesting of samples.Smato have been interpreted by commonly accepted procedures.The stratum lines an the logs may be transitional and (2) ASCE Manual 56(1976) oppmm,note in nature.Water leaelmeasurements refer only to those obseadat the 1imeSandPk)ce3 (3) ASTM D 2049 indicated, and moy wry with time,geologic condition or comnuctdn acra.ry. 1McClelland consultants PLATE 10