Laserfiche WebLink
1.6 Locations and Elevations <br /> The soil boring locations were selected by HGTS based on the anticipated construction and <br /> site access. The ground surface elevations at the boring locations were obtained by HGTS <br /> using GPS measuring equipment. The GPS measurements were based on the NN County <br /> Coordinate System(Hennepin County)in US Survey Feet using the GEOID09(Conus)model. <br /> The approximate location of the soil borings are shown on Figure 1, "Soil Boring Location <br /> Sketch", in the Appendix of this report prepared by HGTS using an aerial photograph from <br /> the Hennepin County GIS website as a base layer. The GPS coordinates are also included on <br /> Figure 1. <br /> 2.0 FIELD PROCEDURES <br /> Two (2) standard penetration test borings were advanced on April 11,2016 by HGTS with a <br /> rotary drilling rig, using continuous flight augers to advance the boreholes. Representative <br /> samples were obtained from the borings,using the split-barrel sampling procedures in general <br /> accordance with ASTM Specification D-1586. In the split-barrel sampling procedure,a 2-inch <br /> O.D.split barrel spoon is driven into the ground with a 140-pound hammer falling 30 inches. <br /> The number of blows required to drive the sampling spoon the last 12 inches of an 18-inch <br /> penetration is recorded as the standard penetration resistance value,or"N"value. The results <br /> of the standard penetration tests are indicated on the boring log. The samples were sealed in <br /> containers and provided to HGTS for testing and soil classification. <br /> A field log of each boring was prepared by the HGTS drill crew. The logs contain visual <br /> classifications of the soil materials encountered during drilling, as well as the driller's <br /> interpretation of the subsurface conditions between samples and water observation notes.The <br /> final boring logs included with this report represent an interpretation of the field logs and <br /> include modifications based on visual/manual method observation of the samples. <br /> The soil boring logs, general terminology for soil description and identification, and <br /> classification of soils for engineering purposes are also included in the appendix. The soil <br /> boring logs identify and describe the materials encountered,the relative density or consistency <br /> based on the Standard Penetration resistance (N-value, "blows per foot") and groundwater <br /> observations. <br /> The strata changes were inferred from the changes in the samples and auger cuttings. The <br /> depths shown as changes between strata are only approximate. The changes are likely <br /> transitions,variations can occur beyond the location of the boring. <br /> 2 <br />