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3.4 Groundwater Conditions <br /> WSB took groundwater level readings in the exploratory borings, reviewed the data obtained, and <br /> discussed its interpretation of the data in the text of the report. <br /> Groundwater was not observed during or shortly after drilling and sampling, however, many of the borings <br /> encountered lean clay soils at depth. In clay soils, it may take a long time (longer than what was <br /> available with our time on site) for water to enter a bore hole and rise to its hydrostatic level. <br /> Nevertheless, the lean clay soils in many instances were wet and contained sand lenses. Based on our <br /> observations and the apparent moisture content in the penetration test samples it is our opinion that <br /> water, given time, would have seeped into many of our boreholes where wet clays were encountered. <br /> Note that groundwater levels may fluctuate due to seasonal variations (e.g. precipitation, snowmelt and <br /> rainfall) and/or other factors not evident at the time of measurement. <br /> Geotechnical Report <br /> 2020 PMP Street Improvements <br /> Arden Hills,Minnesota <br /> WSB Project No.014297-000 Page 4 <br />