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Old Snelling Avenue Roadway Improvements <br />Arden Hills, Minnesota <br /> NTI Project No. 19.MSP09107.000 <br />GENERAL NOTES <br />DRILLING and SAMPLING SYMBOLS LABORATORY TEST SYMBOLS <br />SYMBOL DEFINITION SYMBOL DEFINITION <br />C.S.Continuous Sampling W Moisture content-percent of dry weight <br />P.D.2-3/8” Pipe Drill D Dry Density-pounds per cubic foot <br />C.O.Cleanout Tube LL, PL Liquid and plastic limits determined in accordance <br />with ASTM D 423 and D 424 <br />3 HSA 3 ¼” I.D. Hollow Stem Auger QU Unconfined compressive strength-pounds per <br />square foot in accordance with ASTM D 2166-66 <br />4 FA 4” Diameter Flight Auger <br />6 FA 6” Diameter Flight Auger <br />2 ½ C 2 ½” Casing <br />4 C 4” Casing <br />D.M.Drilling Mud Pq Penetrometer reading-tons/square foot <br />J.W.Jet Water S Torvane reading-tons/square foot <br />H.A.Hand Auger G Specific Gravity – ASTM D 854-58 <br />NXC Size NX Casing SL Shrinkage limit – ASTM 427-61 <br />BXC Size BX Casing Ph Hydrogen ion content-meter method <br />AXC Size AX casing O Organic content-combustion method <br />SS 2” O.D. Split Spoon Sample M.A.Grain size analysis <br />2T 2” Thin Wall Tube Sample C* One dimensional consolidation <br />SH 3” Thin Wall Tube Sample QC Triaxial Compression <br />* See attached data Sheet and/or graph <br />WATER LEVEL SYMBOL <br />Water levels shown on the boring logs were determined at the time and under the conditions indicated. In <br />sand, the indicated levels can be considered relatively reliable for most site conditions. In clay soils, it is not <br />possible to determine the ground water level within the normal scope of a test boring investigation, except <br />where lenses or layers of more pervious water bearing soil are present; and then a long period of time may be <br />necessary to reach equilibrium. Therefore, the position of the water level symbol for cohesive or mixed soils <br />may not indicate the true level of the ground water table. The available water level information is given at the <br />bottom of the log sheet. <br />DESCRIPTIVE TERMINOLOGY <br />RELATIVE DENSITY CONSISTENCY <br />TERM N60 Value (corrected) TERM N60 Value (corrected) <br />Very Loose 0 – 4 Soft 0-4 <br />Loose 5 – 8 Medium 5-8 <br />Medium Dense 9 – 16 Rather Stiff 9 – 15 <br />Dense 16 – 30 Stiff 16 – 30 <br />Very Dense Over 30 Very Stiff Over 30 <br />RELATIVE PROPORTIONS PARTICLE SIZES <br />TERMS RANGE MATERIAL DESCRIPTION U.S. SIEVE SIZE <br />Trace 0 – 5% Boulders Over 3” <br />A little 5 – 15% Gravel Coarse 3” to ¾” <br />Some 15 – 30% Medium ¾” to #4 <br />Sand Coarse #4 to #10 <br />Medium #10 to #40 <br />Fine #40 to #200 <br />Silt and Clay Determined by Hydrometer Test