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SUBSURFACE EXPLORATION <br /> LOT 2, BLOCK 1 <br /> KELLY 2nd ADDITION <br /> ORONO, MINNESOTA <br /> ALLIED No. 94117 <br /> of 939.4 feet was used for this temporary benchmark as shown on the lot survey provided. The <br /> surface elevadons at each of the drilling locations is shown on the respective boring log included <br /> in the appendix to this report. These elevations are intended to provide a relatively fixed <br /> reference for the location of the subsurface conditions encountered. The depths shown on the <br /> boring logs are with respect to the existing ground surface at the time of drilling. <br /> FIELD EXPLORATION <br /> Inidally, three Standard Penetration Test, (SPT), borings were drilled to depths ranging <br /> from 16.5 to 26.5 feet on November 1 st, 1994. At some depths within these preliminary <br /> borings, 3" Shelby tube samples were collected in accordance with ASTM D: 1587-83, <br /> "Standard Pracdce for Thin-Walled Tube Sampling of Soils". Selected portions of the samples <br /> obtained from the borings were subjecteti to laboratory index property and strength tests. After <br /> reviewing the information obtained from the test borings, an additional, deeper, penetration <br /> boring was put down to a depth of 51.5 feet using fluid drilling techniques. <br /> All of the exploratory borings were drilled in accordance with ASTM: D 1586-84, <br /> "Standard Method for Penetration Test and Split-Barrel Sampling od Soils". Using this <br /> procedure, a 2" O.D. split barrel sampler is driven into the soil by a 140 lb weight falling a <br /> distance of 30". After an initial set of 6", the number of blows required to drive the sampler an <br /> additional 12" is known as the Standard Penetration Resistance or "N" value. The "N" value <br /> provides an indication of the relative density of cohesionless, (sandy or coarse grained), soils <br /> and of the consistency of cohesive, (fine grained or clayey), soils. <br /> 3 <br />