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SOIL & MATERIALS ENGINEERS, INC <br />Van Eeckhout Building Corporation <br />1055 East Wayzata Boulevard <br />Wayzata, Minnesota 55391 <br />Attention: Mr. Jerry Finnamore <br />Soil Percolation Test for Proposed Residence at Lots 6 and 7» Block 2, <br />Swanlake Addition, Orono, Minnesota <br />Gentlemen: <br />We were retained by you to perform soil percolation tests at the above <br />property (see Drawing No. 1 attached). The tests were performed on May 18, <br />1976. The procedure was in accordance with the methods designated by the <br />Minnesota Department of Health, 1971, and somewhat modified by our engineering <br />Judgment. <br />The attached log sheets indicate the observed percolation rates at each of <br />the test holes (P-1 through P-6). The observed percolation rates at each of <br />the test holes was within the maximum allowable rate of 60 minutes per inch, <br />as recommended by the Minnesota Department of Health. Based on these observa­ <br />tions, the installation of an individual soil absorption system will be accept­ <br />able in the areas tested. <br />In addition to the above percolation test holes, one test boring was drilled <br />to a depth of 15.0 feet below the existing ground surface to determine if the <br />water table Is less than that depth. According to the readings listed on the <br />attached log sheets, it is our opinion that the level of the groundwater table <br />was below that depth at the time of the Investigation. <br />Fluctuations in the water level may occur over a wide range, depending <br />upon the amount of precipitation, evaporation and surface runoff which will vary <br />with seasonal changes. <br />Based on the test results, installation of an individual soil absorption <br />disposal system should be acceptable for a recommended design rate of 30 minutes <br />per inch ii the vicinity of P-4 through P-6; or a rate of 60 minutes per inch In <br />the vicinity of P-1 through P-3* The observed water table In the area is at a <br />depth greater than 6 1/2 feet below the existing ground surface, making an <br />absorption system acceptable according to State Code regulations. <br />SOIL & MATERIALS ENGINEERS. INC ■ 7900 77TH AVENUE NORTH.MINNEAPOLIS.MINNESOTA 55445 ■ (612) 425-6478 <br />DARRELL F. SCHNEIDER PE <br />MICHAEL L. LARSON PE <br />JAMES H.OVERTOOM P.E. <br />KEITH P. CASWELL JR PE <br />JOHN P. GNAEDINGER PE. <br />CLYDE N.BAKER JR PE, <br />Affiliate of <br />STS CONSULTANTS.LTD. <br />consulting ENGINEERS DIVERSIFIED INC.