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June 7, 1978 <br />Mr. Lester Kelly <br />125 South Brown Road <br />Long Lake, Minnesota 55356 <br />Res Percolation Tests for Subdivision Platting, Orono, Minnesota <br />Job Number 11-76-25 <br />Dear Mr. Kellys <br />Enalosed is information requested in regards to -the suitability of <br />Parcels 2 and 3 for on-site sewage treatment. <br />The drainfield information is based on percolation tests and soil <br />borings performed on May 23, 24, and 25, 1978, <br />Parcel 2 <br />The soils found on Parcel 2 are Glencoe silty clay loam, Hamel loam <br />and Lester loam. These soils are mapped in Figure 1. the percola- <br />tion rate for the primary field as tested was 9.7 minutes/inch. The <br />percolation rate for the secondary field as tested was 7.3 minutes/ <br />the proposed drainfield areas are indicated in Figure 1. Percolation <br />rates and depths to the water table are shown in Table 1. The soil <br />logs of the soil borings are shown in Table 2. <br />An 'innovative shallow trench systwm" or a mound system <br />ed for both the primary and secondary drainfield sites. <br />toms will allow for the required 3.0' separation between <br />of the drainfield and the water table. The soil borings <br />the primary and secondary drainfield sites indicate that <br />table is at a lepth )f 4.0' or greater. I have enclosed <br />tion view of such a system. <br />Parcel 3 <br />is recommend - <br />These sys- <br />the bottom <br />taken at <br />the water <br />an eleva- <br />`The soils found on Parcel 3 are Glencoe silty clay loam, Hanel loan <br />and Lester loam. These soils are mapped in Figure 1. The percola- <br />tion rate for the primary field as tested was 6.5 minutes/inch. The <br />percolation rate for the secondary field as tested was 11.5 minutes/ <br />inch. The location 3f the percolation rest holes, soil borings, and <br />proposed drainfield areas are indicated in Figure 1. Percolation <br />rates and depths to the water table are shown in Table 1. The soil <br />loqs of the soil borings are shown in Table 2. <br />