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AMERICAN ENGINEERING TESTING, INC. AET Project No. 26-00538 <br /> of the existing street grades. Underground utilities (watermain) will be replaced as part of this <br /> construction on 3 d Street NW. New watermain will be a part of this project at 185 1h Avenue <br /> NW. <br /> The information stated above represents our understanding of the proposed construction. This <br /> information is an integral part of our engineering review. It is important that you contact us if <br /> there are changes from that described so that we can evaluate whether modifications to our <br /> recommendations are appropriate. <br /> 4.0 SUBSURFACE EXPLORATION AND TESTING <br /> 4.1 Field Exploration Program <br /> The subsurface exploration program conducted for the project consisted of fourteen(14) standard <br /> penetration test borings. The logs of the borings and details of the methods used appear in <br /> Appendix A. The logs contain information concerning soil layering, soil classification, geologic <br /> description, and moisture condition. Relative density or consistency is also noted for the natural <br /> soils, which is based on the standard penetration resistance (N-value). <br /> The boring locations are shown on Figures 1, 2, and 3 in Appendix A. The borings were located <br /> in the field by personnel from AET. Surface elevations at the boring locations were measured in <br /> the field by AET personnel using multiple benchmarks provided by the City of Elk River. <br /> 4.2 Laboratory Testing <br /> The laboratory test program included six (6) sieve analysis tests and four (4) water content tests. <br /> The test results appear in Appendix A on the individual boring logs adjacent to the samples upon <br /> which they were performed. <br /> Page 2 of 9 <br />