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ADVANCE SURVEYING & EHGINEERING C0. <br /> 5811 Cedar Lake Road, Minneapolis, MN 55416 Phone 541 0500 <br /> December 8, 1987 <br /> Robert Posthumus <br /> 24200 Natches . <br /> Lakeville, MN 55044 <br /> Dear Robert: <br /> At your request we have conducted an investigation of soil <br /> conditions on a proposed building site designated by you. The <br /> site is located at Big Island on Lake Minnetonka in Orono, <br /> Minnesota. <br /> The investigation was to determine the percolation rate of the <br /> soils on site and to check for the presence of a high water table <br /> or evidence of mottled soil that might indicate a seasonally <br /> high, fluctuating water table. <br /> The investigation consisted of exploratory soil borings to aid in <br /> identifying soil texture and water conditions. The borings were <br /> taken at the locations indicated on the attached site plan. <br /> INVESTIGATION METHODS: <br /> Percolation tests and one or more deep borings were taken at <br /> the locations indicated on the enclosed site plan. Logs of the <br /> borings and tests are attached for your installer and inspector's <br /> reference. <br /> �� <br /> RESIILTS: <br /> Because the attached boring logs reveal the presence of mottled <br /> soil and/or high water table at a high level in the borings, a <br /> conventional system will not function at the proposed site. <br />