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, <br /> PxoNE: 763-633-2222 <br /> Fn3c: 763-633-2224 <br /> Miller Environmental Inc. 11040 183rd Circle N.W.,Suite AA• Elk River,MN 55330 <br /> � <br /> � May 19, 2006 <br /> � Gabriel Jabbour <br /> 220 Tonka Bay Road <br /> Tonka Bay, Minnesota 55331 <br /> � <br /> Subject: Onsite Wastewater System (OWS) Design <br /> � Le�al Description - 4455 Bayside Road; City of Orono; He epin County <br /> � Site Conditions - The property has four bedroom residen e, private well and OWS. The OWS was <br /> deemed in non-compliance by others and in need of placement. The proposed OWS site is <br /> predominantly vegetated with mowed Kentucky blue gr�ss ith a few trees on an 8-14% slope. <br /> � Soil Conditions — The Hennepin County soil survey mappe the proposed drain field area as the Lester <br /> Series. The Lester Series is the unofficial Minnesota state s il and is very common in Des Moines Lobe <br /> � glacial till deposits of central Minnesota, specifically Wright and Hennepin Counties. <br /> A copy of the description for the Lester Series is included i Appendix A. The soil survey indicates the <br /> � soils in the Lester Series are very deep, well drained lo y soils formed in glacial till. Three soil <br /> observation pits were completed in the area of the propos d drain field area, see Figure 1. The soil <br /> profile descriptions closely matched the soil survey descripti n of the Lester Series in the proposed drain <br /> � field location (S 1 and S2). <br /> Soil observation pits 1 and 2 in the drain field area indicat the site is underlain by high chroma loam <br /> and clay loam soils to approximately 6 feet. The parent m terial for the area, high chroma loam soils <br /> � with many threads of calcium carbonates (often misidenti ed as low chroma iron reductions), were <br /> found to the depth of the borings. Few gray sand coatings o ped faces, calcium carbonates, and reddish <br /> iron concretions (referred to as ochres in the geologic cultu ) were observed. These soil features are a <br /> � result of the soil parent material not a fluctuating seasonal w ter table. <br /> Moving down slope (S3) yielded the observation of a perch d water condition at approximately 2.5 feet <br /> � below the surface. It is believed that a higher clay content i the Bt horizon and the increase watershed <br /> area moving down slope causes an epi-saturation condition above the C-horizon parent material. This <br /> area was avoided with the proposed drain field. <br /> � Two ercolation tests were erformed at the locations o Fi <br /> P p gure 1. The depth of the tests were <br /> , approximately 22 and 24 inches. The results of the tests wer favorable and are found in Appendix A. <br /> � 1 <br /> ' <br />