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ST □ A 1""'1@ Stork Twin City Testing Corporation Materials Technology Proposed New Residence at 1635 Sohns Point Road Orono, Minnesota Stork Twin City Testing Corporation Project #TCT006405P Page 6 of 11 our opinion that a limited soil correction to replace the upper frost susceptible soils would be necessary. Dewatering will be necessary to perform the soil correction. The earthwork and dewatering should be performed by an experienced contractor with a proven record for performing this type of work. Site preparation should consist of removing the existing construction and vegetation. After the implementation of a dewatering plan, we recommend a subcut of 5' below the existing grade to remove the existing fill and underlying lean clay be performed for the entire house building pad. The excavation base exposed at the final subcut grade should be subject to surface densification. We caution that surface densification performed close to the water level may pump up the water and disturb the natural clay soil. Dewatering of the excavation should be performed to lower the water level below the excavation base elevation to allow for surface densification. We recommend that the excavation at the footing locations be laterally oversized at least one foot for each foot (i.e., 1 :1 lateral oversizing) it extends below the bottom of foundation. This lateral oversizing is necessary to properly distribute the foundation loads through the fill placed to attain design footing grades. A drawing showing the recommended oversizing is included in the Appendix. The soils at the 5' subcut elevation should be evaluated by the project geotechnical engineer or their representative to verify density and bearing capacity. These services should be performed prior to placement of engineered fill to design grades. After the excavation base soil has been observed and tested, engineered fill may be placed in the excavation to attain the desired final grades. We recommend that the engineered fill soil be comprised of clean sand (SP) with less than 5% passing the #200 sieve and preferably less than 50% passing the #40 sieve. We recommend that the fill be compacted to 98% of the Standard Proctor dry density (ASTM: D 698). lnfcnn"'iion and statuments ln thls rep0rt are derived from material, information and/or specificauons fUrnished by the client and exciude any expressed or implied warranties as lo the fitness of the material tested or analyzed for any partk:ular purpose or use. This certificate or report is the confldentlal property of our client and may not be used for advertising purposes. This ceruricale or report shall not be reproduced e,cc:ept In full, without written approval of thls laboralory and shalt be signed or otherwfse approved by authorized staff members only. The recording of false, ficti1ious or fraudulent statements or entries on lhls document may be punished as a felony under Federal Statues Including Federal Law Title 18, Chapter 47. This dacumenl contains teotmical data whose export and rewexport/rewtransfer is subject lo control by the U.S. Department of Commerce under me Export Admlnlstrat!cn Act and the Export Administration Regt.dalions. The department of Commerce's prior wtilten approval is r~quired far the export or re.expo ft/re~ ttansfer of such technical information to any foreign person, foreign entity or rorelgn organizalion whether in the Uniled States or abroad. EAR-CONTROLLED DATA.