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August 8, 2023 <br />ITT Project 23-192 <br />City Project 24-12 <br />Juniper Woods 1-3 Street Reconstruction <br />Ramsey, Minnesota <br />In using the above R-value for bituminous pavement design, it is essential that the subgrade be <br />constructed of uniform soils at a moisture content and density in accordance with Mn Dot <br />specification 2105 and capable of passing a test roll in accordance with Mn Dot specification <br />2111. The native, undisturbed soils may need preparation (drying and compacting) to pass a <br />proof roll. If the subgrade is not compacted, uniform and capable of passing a test roll, then we <br />recommend the subgrade be scarified and recompacted or subcut and geotextile fabric placed <br />along with select granular material meeting Mn Dot specification 3149. The top of subgrade <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 <br />does 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 <br />horizontal distances. Also, the actual interface between strata will likely be a gradual transition <br />rather than an 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 <br />by a qualified geotechnical engineer or technician. We recommend ITT be retained to perform <br />construction observation and materials testing on this project due to our familiarity with the soils. <br />Any changes in the subsurface conditions from those found during this geotechnical exploration <br />should be brought to the attention of a soils engineer. <br />Page 8 <br />