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<br />DFi1LL1NG AND IXPL0RAT10N <br />". pRILL1NG & SAMPLING SYMBOLS: <br />SS :Split Spoon - 1 ' I.D., 2' O.D., unless otherwise noted PS :Piston Sample <br />ST :Thin-Walled Tube - 2' O.D., unless otherwise noted WS :Wash Sample <br />R :Ring Barrel Sampler - 2.42' I.D., 3' O.D. unless otherwise noted. <br />PA :Power Auger FT :Fish Tail Bit <br />HA :Hand Auger RB :Rock Bi[ <br />OB :Diamond Bit BS :Bulk Sample <br />AS :Auger Sample PM :Pressure Meter <br />HS :Hallow Stem Auger DC :Dutch Cone <br /> WB :Wash Bore <br />I Penetration Test: Blows per foot of a 140 pound hammer falling 30 inches an a 2~nch O.D. split spoon, except where noted. <br />WATER LEVEL MEASUREMENT SYMBOLS: <br />WL :Water Level WS :While Sampling <br />WCI :Wet Cave in WO :While Drilling <br />DCI :Dry Cave in BCR :Before Casing Removal <br />:II::. AB :After Baring ACA :After Casting Removal <br />f~ Water Levels indicated on the baring logs are the levels measured in the borings at the time indicated. In pervious soils, the <br />indicated levels may reflect the location of groundwater. In Icw permeability sails, the accurate determination of groundwater <br />levels is not possible with only short term observations. <br />DESCRIPTIVE SOIL CLASSIFICATION PHYSICAL PROPERTIES OF BEDROCK <br />Sail Classification is based on the Unified Scil DEGREE OF WEATHERING: <br />Classification system and the ASTM Designations D-2487 <br />and D-2488. Coarse Grained Soils have more than 50% Slight Slight decomposidon of parent material on <br />of their dry weight retained on a x200 sieve; they are joints. May be color change. <br />described as: boulders, cobbles, gravel or sand. Fine <br />Grained Soils have less than 50% of their dry weight Moderate Some decomposition and color change <br />retained an a X200 sieve; they are described as: clays, it throughout. <br />they are plastic, and silts if they are slightly plastic ar nan- <br />plastic. Major constituents may be added as modifiers and High Rock highly decomposed, may be <br />minor constituents may be added according to the relative extremely broken. <br />i prcoortions based on grain size. In addition to gradation, <br />coarse grained soils are defined on the basis of their HARDNESS AND DEGREE OF CEMENTATION: <br />relative in-place density and fine grained soils on the basis Limestone and Dolomite: <br />of their consistency. Example: lean clay witri sand, trace Hard Difficult to scratch with knife. <br />gravel, stiff (CLI; silty sand, trace gravel, metlium dense <br />(SM). Moderately Can be scratched easily with knde, <br /> Hard Cannot be scratched with fingemail. <br />CONSISTENCY OF FINE-GRAINED SOILS <br /> Soft Can be scratched with fingemail. <br />Unconfined Compressive <br />Strength, Qu, psf Consistency Shale, Sgtstone and Claystane: <br /> Hard Can be scratched easily with knife, Wnnot <br />< 500 Very Soft be scratched with fingemail. <br />500 - 7,000 Soft <br />1,001 - 2.000 Medium Moderately Can be scratched with fingemail. <br />2,001 - 4,000 Stiff Hard <br />4,001 - 8.000 Very Stiff <br />8,001 - 16,000 Very Hard Soft Can be easily dented but not molded with <br /> fingers. <br />RELATNE DENSITY OF COARSE-GRAINED SOILS: <br />N-Blowslft Relative Density Sandstone and Conglomerate: <br />0-3 Very Loose Well Capable of scratching a knife blade- <br />a-3 Lcase Cemamed <br />10-29 Medium Dense <br />30-x9 Dense Cemented Can be scratched with knife. <br />50-80 very Dense <br />80 ~ Extremely Dense Poorly Can be broken apart easily with fingers. <br /> Cemented <br />~- l~~rra~on - <br />