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J <br />Hakanson <br />Anderson <br />Assoc, Inc. <br />Engineers. Surve> ..rs 8^ <br />Landscape Architects <br />September 22, 1987 <br />Mr. James Brownlee <br />250 Cygnet Place <br />Long Lake, MN 55356 <br />Dear Mr. Brownlee; <br />At your request, a site evaluation to determine soil suitability <br />for a replacement on-site sewage treatment system was performed at <br />Lot 9, Block 3, Swan Lake Addition in the City of Orono, Minnesota. <br />Standard methods of percolation testing were employed. Elevations <br />are relative to an assumed elevation of 100.0 feet based at the <br />top of the 12” concrete foundation blocks at the northeast corner <br />of the house (see enclosed sketch). <br />This report includes; <br />1. <br />2. <br />3. <br />4. <br />5. <br />Soil boring logs <br />Percolation test results <br />Testhole location and septic system configuration <br />sketch <br />Septic system design specifications <br />Discussion and recommendations. <br />The soil boring logs show that sandy loam surface soils overlie <br />sandy clay loam to sandy clay subsurface soil horizons. Soil <br />mottling begins at 2.0 to 3.0 feet depth at the boreholes. Soil <br />mottles (spots of contrasting color) are accepted indicators of <br />periodic saturation in soils. Ground water was encountered at <br />Borehole #4 at six feet depth on September 22, 1987. <br />Hole Elevation Depth (inches) <br />Soil Texture at <br />Bottom of Hole <br />Percolation Rate <br />(min/in)_ _ _ <br />P-1 <br />P-2 <br />96.2 <br />96.0 <br />12 <br />24 <br />Sandy loam <br />Sandy clay loam <br />9 <br />22 <br />The measured percolation rates are consistent with the texture of <br />the soil materails in which the percolation tests were run. <br />222 Mor.i Stf; <br />Anoka. Minnesota 5!>303 <br />612/427-5860 <br />Eugene ). Hakanson. PL <br />lames M. Winter. LS. <br />Lawrence G Koshak. PL <br />Peter R. Raatikka. PL