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Preliminary Report of Geotechnical Exploration <br />Main & Gates Redevelopment; Elk River, Minnesota AMERICAN <br />July 9, 2021 ENGINEERING <br />Report No. P-0001445 TESTING, INC. <br /> <br /> <br /> <br />Page iii <br /> <br />TABLE OF CONTENTS <br />1.0 INTRODUCTION .................................................................................................................................. 1  <br />2.0 SCOPE OF SERVICES .......................................................................................................................... 1  <br />3.0 PROJECT INFORMATION ................................................................................................................... 1  <br />4.0 SUBSURFACE EXPLORATION AND TESTING ............................................................................... 2  <br />4.1 Field Exploration Program .................................................................................................................. 2  <br />4.2 Laboratory Testing .............................................................................................................................. 2  <br />5.0 SITE CONDITIONS ............................................................................................................................... 2  <br />5.1 Surface Observations ........................................................................................................................... 2  <br />5.2 Subsurface Soils/Geology ................................................................................................................... 3  <br />5.3 Groundwater ........................................................................................................................................ 4  <br />6.0 RECOMMENDATIONS ........................................................................................................................ 4  <br />6.1 Approach Discussion ........................................................................................................................... 4  <br />6.2 Building Grading ................................................................................................................................. 4  <br />6.3 Foundation Design .............................................................................................................................. 6  <br />6.4 Floor Slab Design ................................................................................................................................ 7  <br />6.5 Basement Backfilling/Water Control .................................................................................................. 7  <br />6.6 Foundation and Exterior Building Backfilling .................................................................................... 8  <br />7.0 CONSTRUCTION CONSIDERATIONS .............................................................................................. 9  <br />7.1 Potential Difficulties ........................................................................................................................... 9  <br />7.2 Excavation Backsloping .................................................................................................................... 10  <br />7.3 Observation and Testing .................................................................................................................... 10  <br />8.0 ASTM STANDARDS .......................................................................................................................... 10  <br />9.0 LIMITATIONS ..................................................................................................................................... 10  <br /> <br />STANDARD SHEETS <br /> Floor Slab Moisture/Vapor Protection <br /> Basement/Retaining Wall Backfill and Water Control <br /> Freezing Weather Effects on Building Construction <br /> Definitions Relating to Pavement Construction <br /> <br />APPENDIX A – Geotechnical Field Exploration and Testing <br /> Boring Log Notes <br /> Unified Soil Classification System <br /> Figure 1 - Boring Locations <br /> Subsurface Boring Logs <br /> Results of Sieve Analysis Tests <br /> <br />APPENDIX B – Geotechnical Report Limitations and Guidelines for Use Draft