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, � < , ♦ ITCO ALLIED ENGINEERING CO. AN ALLIANCE OF INSTANT TESTING COMPANY AND ALLIED TEST DRILLING Jobsite and Laboratory Testing, Geotechnica/Services, Commercial, Residentia/and Municipal 7125 West 126th Street, Suite#500 - Savage, MN 55378 Telephone: (952)890-7366 Fax: (952)890-5883 June 11, 2014 Atlashomes Phone: 763-425-3333 14450- 117'h Avenue North Fax: 763-390-0039 Dayton, Minnesota 55369 mark@atlashomesmn.com RE: Lot 8 Block 6, Maple Place Orono, Hennepin County, Minnesota As requested, a site visit was made on June 11, 2014 at 11:08 A.M, to evaluate and test soils for the construction of a full basement single-family residence. At the time of the inspection, an � excavation with sides collapsed from recent rains and with about 6"of water in the center. The base of the excavation consisted of approximately 18"of a wet, soft clay on top of a fairly solid Clay base. To assess the relative strength of the base soils, a 5/8'h inch diameter smooth probe was used at random to penetrate the excavation circumference. With full body weight applied, the probes indicated solid clay base at all points. The load bearing capacity of the soils were evaluated by a dynamic cone penetrometer test conducted at the base of the excavation. The dynamic cone penetrometer (DCP), employs a eight kilogram (17.6 pound) hammer to drive a 20 millimeter diameter conical point into the soil, with the penetration recorded in millimeters per blow. From the DCP readings, a per blow, penetration average was recorded and a N-value derived. This N-value is an empirical relationship we have established to equate the dynamic cone data to the more familiar blows per foot(8PF)standard penetration soil boring test. Test#1 — Excavation Base (East side) DCP Depth Per Blow Avct. / N-Value Estimated Load 158 MM (6.2") 16 MM/ N—20 >4000 PSF Based upon our observations and tests, it is recommended that all soft clay be excavated from the building pad, and replaced with a granular engineered fill to proposed footing elevation. This fill material should be consolidated with a vibratory compaction device at intervals of approximately 8 to 10 inches. In our opinion, with the noted corrections, the observed and tested sub-grade soils are acceptable, and would be expected to meet an assumed minimum bearing capacity requi�ement of 2000 PSF, for the proposed construction. Our observations and subsequent soil evaluation on this date is limited in scope to soil conditions observed within the completed excavation, and to the depths achieved by shallow probes and a dynamic cone penetrometer test. Sincerely, Itco Allied Engineering Company Reviewed By: ��6'�sG;.G.(I �� Gp"__" Ken Schaaf Robert P. Sullentrop, P.E. Senior Inspector Minnesota Reg. # 17823 CC: City of Orono Building Inspections 701 - 0 / #605— 1 / #610—'/< /#304/(1) DCP / #612—53