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Bremer Financial Corporation <br />Project B2008939 <br />November 17, 2020 <br />Page 24 <br /> <br /> <br />D.3. Material Classification and Testing <br /> <br />D.3.a. Visual and Manual Classification <br />We visually and manually classified the geologic materials encountered based on ASTM D2488. When we <br />performed laboratory classification tests, we used the results to classify the geologic materials in <br />accordance with ASTM D2487. The Appendix includes a chart explaining the classification system we <br />used. <br /> <br />D.3.b. Laboratory Testing <br />The exploration logs in the Appendix note the results of the laboratory tests performed on geologic <br />material samples. We performed the tests in general accordance with ASTM procedures. <br /> <br />D.4. Groundwater Measurements <br /> <br />The drillers checked for groundwater while advancing the penetration test borings, and again after auger <br />withdrawal. We then filled the boreholes or allowed them to remain open for an extended period of <br />observation, as noted on the boring logs. <br /> <br /> <br />E. Qualifications <br /> <br />E.1. Variations in Subsurface Conditions <br /> <br />E.1.a. Material Strata <br />We developed our evaluation, analyses and recommendations from a limited amount of site and <br />subsurface information. It is not standard engineering practice to retrieve ma terial samples from <br />exploration locations continuously with depth. Therefore, we must infer strata boundaries and <br />thicknesses to some extent. Strata boundaries may also be gradual transitions, and project planning <br />should expect the strata to vary in depth, elevation and thickness, away from the exploration locations. <br /> <br />Variations in subsurface conditions present between exploration locations may not be revealed until <br />performing additional exploration work, or starting construction. If future activity for thi s project reveals <br />any such variations, you should notify us so that we may reevaluate our recommendations. Such <br />variations could increase construction costs, and we recommend including a contingency to <br />accommodate them.