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Report of Geotechnical Exploration and Review <br /> 1105 Ferndale Road West,Orono,Minnesota AMERICAN <br /> June 21,2013 ENGINEERING <br /> Report No.01-05798 TESTING,INC. <br /> house is unknown or is not supported on a deep foundation system, you could also consider a <br /> deep foundation using helical piers(such as A.B. Chance helical piers or Atlas helical piers). <br /> As discussed above, new loads imparted by placing fill to raise grade will cause significant <br /> settlement of the swamp deposits. The settlement will occur not only at the location where the <br /> fill is placed, but will also cause settlement of the ground surface in the area surrounding the new <br /> fill. Therefore, it will be very important to limit the placement of new fill in the building and <br /> grading design. It is our understanding that the new building footprint will roughly match the old <br /> building footprint (and the old footprint is typically 2 to 3 feet below suriounding grade). We <br /> strongly recommend that the new building utilize precast concrete plank supported on grade <br /> beams for the first floor (including the garage), so that significant amounts of new fill will not <br /> need to be placed in the building footprint. <br /> Based on the grading plan, it appears that the only area outside the building to receive significant <br /> amounts of fill is the garage approach area, where grade will be raised up to about 2 feet. Note <br /> that the ground surface in this area(and possibly to a lesser extent in other azeas)will continue to <br /> settle over time (for decades, with most settlement occurring in the first few years), which will j <br /> result in settlement of the landscaping,pavement, sidewalks and any other exterior structures not I <br /> supported on driven piles or helical piers. Therefore, settlement sensitive exterior structures such <br /> as steps, canopies and decks should be supported on driven piles or helical piers. It is our <br /> understanding that the driveway is currently gravel surface; we recommend postponing placing <br /> any paving or pouring the garage apron for some time (at least a couple seasons) to allow for <br /> some settlement to occur and so that the amount of settlement can be evaluated. In general, you <br /> should anticipate the need for greater than normal maintenance of exterior structures. <br /> Details of our recommendations are given below. <br /> Page 5 of 10 <br />