1975-03-11 Report on Variance - Laserfiche WebLink

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GENEML NOTES See attached data sheet and/or graph WATER LEVEL SYMBOL —'W Water levels shown on the boring logs are the levels measured in the borings at the time and under the conditions indicated. In sand, the indicated levels can be considered reliable ground water levels. In clay soil, it is not possible to determine the ground water level within the normal scope of a test boring investigation, except where lenses or layers of more pervious waterbearing soil are present and then a long period of time may be necessary to reach equilibrium. Therefore, the position of the water level symbol for cohesive or mixed texture soils may not indicate the true level of the ground water table. The available water level information is given at the bottom of the log sheet. DENSITY TERM Very loose Loose Medium Dense Dense Very Dense DESCRIPTIVE TERMINOLOGY "N" VALUE 0-4 5-8 9-15 16-30 Over 30 CONSISTENCY TERM "N" VALUE Soft Medium Rather Stiff Stiff Very Stiff 0-4 5-8 9-15 16-30 Over 30 Standard "N" Penetration: Blows per foot of a 140 pound hammer failing 30 inches on a 2 inch OD split spoon. RELATIVE PROPORTIONS TERM Trace A Little Some With PARTICLE SIZES Boulders G ra ve I Coarse Fine Sand Coarse Medium Fine Silt and Clay Note: Sieve sizes shown are U S. Standard SE -4(70A) RANGE 0-5% 5.15% 15-30`6 30-50% Over 3" ai-3' 114-'4.. #4-#10 1110-1140 440-#200 Determined by plasticity Characteristics DOLLING & SAMPLING SYIII111110ILS LABORATORY' TEST SYIWLS svrOl DEFINITION SYMBOL DEFINITION C.S. Continuous Sampling W Moisture content - percent of dry weight P. D. 2-3/8" Pipe Drill D Dry density-poundS per cubic foot C.O. Cleanout Tube LL, PL Liquid and plastic limits determined in 31A HSA 3%" I.D. Hollow Stem Auger accordance with ASTM D 423 and D 424 4 FA 4" Diameter Flight Auger Qu Unconfined compressive strength -pounds per 6 FA 6" Diameter Flight Auger square foot in accordance with ASTM D2166-66 2'/i C 21h" Casing 4C 4" Casing Additional insertions in Ou column D. M. DriIIingMud Pq Penetrometer reading-tons/square foot J. W. Jet Water Ts Torvane reading -tons 'square foot H. A. Hand Auger G Specific gravity - ASTM D 854-58 NXC Size NX Casing SL Shrinkage limit - ASTM D 427-61 BXC A XC A2" Size BX Casing Size AX Casing PN Hydrogen ion content -meter method SS O.D. Split Spoon Sample O Organic content -combustion method 2T 2" Thin Wall Tube Sample M.A.' Grain size analysis 3T 3" Thin Wall Tube Sample C. One dimensional consolidation Qc' Triaxial compression See attached data sheet and/or graph WATER LEVEL SYMBOL —'W Water levels shown on the boring logs are the levels measured in the borings at the time and under the conditions indicated. In sand, the indicated levels can be considered reliable ground water levels. In clay soil, it is not possible to determine the ground water level within the normal scope of a test boring investigation, except where lenses or layers of more pervious waterbearing soil are present and then a long period of time may be necessary to reach equilibrium. Therefore, the position of the water level symbol for cohesive or mixed texture soils may not indicate the true level of the ground water table. The available water level information is given at the bottom of the log sheet. DENSITY TERM Very loose Loose Medium Dense Dense Very Dense DESCRIPTIVE TERMINOLOGY "N" VALUE 0-4 5-8 9-15 16-30 Over 30 CONSISTENCY TERM "N" VALUE Soft Medium Rather Stiff Stiff Very Stiff 0-4 5-8 9-15 16-30 Over 30 Standard "N" Penetration: Blows per foot of a 140 pound hammer failing 30 inches on a 2 inch OD split spoon. RELATIVE PROPORTIONS TERM Trace A Little Some With PARTICLE SIZES Boulders G ra ve I Coarse Fine Sand Coarse Medium Fine Silt and Clay Note: Sieve sizes shown are U S. Standard SE -4(70A) RANGE 0-5% 5.15% 15-30`6 30-50% Over 3" ai-3' 114-'4.. #4-#10 1110-1140 440-#200 Determined by plasticity Characteristics