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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 10 of 10 <br />7.1.3 Cobbles and Boulders, Possible Construction Debris <br />The soils at this site can include cobbles and boulders. There may also be remnants of the <br />demolished residences. This may make excavating procedures somewhat more difficult than <br />normal if they are encountered. <br /> <br />7.2 Excavation Backsloping <br />If excavation faces are not retained, the excavations should maintain maximum allowable slopes <br />in accordance with OSHA Regulations (Standards 29 CFR), Part 1926, Subpart P, <br />“Excavations” (can be found on www.osha.gov). Even with the required OSHA sloping, water <br />seepage or surface runoff can potentially induce sideslope erosion or sloughing which could <br />require slope maintenance. <br /> <br />7.3 Observation and Testing <br />The recommendations in this report are based on the subsurface conditions found at our test <br />boring locations. Since the soil conditions can be expected to vary away from the soil boring <br />locations, we recommend on-site observation by a geotechnical engineer/technician during <br />construction to evaluate these potential changes. Soil density testing should also be performed on <br />new fill placed in order to document that project specifications for compaction have been <br />satisfied. <br /> <br />8.0 ASTM STANDARDS <br />When we refer to an ASTM standard in this report, we mean that our services were performed in <br />general accordance with that standard. Compliance with any other standards referenced within <br />the specified standard is neither inferred nor implied. <br /> <br />9.0 LIMITATIONS <br />Within the limitations of scope, budget, and schedule, we have endeavored to provide our <br />services according to generally accepted geotechnical engineering practices at this time and <br />location. Other than this, no warranty, express or implied, is intended. <br /> <br />Important information regarding risk management and proper use of this report is given in <br />Appendix B entitled “Geotechnical Report Limitations and Guidelines for Use.” Draft