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March 2, 2020 <br />Project 19-460 <br />Jackson Hills Residential Suite <br />Phases II- IV <br />Elk River, Minnesota <br />should be compacted to a minimum of 100% of standard proctor maximum density. The <br />subgrade should be sloped towards the edges to provide drainage. <br />F. Closing <br />Our work was performed for geotechnical purposes only and not to document the presence or <br />extent of any contamination on the site. We can note that our crew did not detect any obvious <br />contamination by sight or smell during drilling operations. However, human senses are limited in <br />terms of contamination detection and, therefore, the lack of detection through human sensing does <br />not preclude the possibility of the presence of contamination of the site. <br />This report represents the result of our subsurface investigation and is based on information <br />gathered at specific locations. Subsurface conditions can change a great deal over short horizontal <br />distances. Also, the actual interface between strata will likely be a gradual transition rather than an <br />abrupt change as represented on the boring logs. <br />Geotechnical engineering is based extensively on opinion. Therefore, the data contained in this <br />report should be used as a guide, and we recommend that construction monitoring be performed by <br />a qualified geotechnical engineer or technician. Any changes in the subsurface conditions from <br />those found during this geotechnical investigation should be brought to the attention of a soils <br />engineer. <br />Page 10 <br />c:19406-rpt <br />