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To: <br />Prom: <br />Date: <br />Jeanne A. Mabusth, Building & Zoning Administrator <br />Michael P. Gaffron, Asst Planning & Zoning Administrator <br />March 1, 1990 <br />D <br />Subject: #1506 Carol Senn, 3220 Watertown Road - <br />Septic System Testing Review <br />I walked this property in February 1990 prior to the <br />subdivision application at the request of the surveyor. Septic <br />testing had been completed in December, and the test holes were <br />staked. <br />I would like to make the following regarding the proposed <br />drainfield sites: <br />1. Lot 1 is a 5.25 acre proposed building site, with 2.57 <br />acres of contiguous dry buildable. For purposes of the <br />Carlson subdivision adjacent to the east, the 970' contour <br />was accepted as the flood plain elevation, and that would <br />appear to be an acceptable elevation for flood plain in Lot <br />1. Further detailed analysis downstream might allow a <br />lowering of the flood plain elevation in Lot 1 if that <br />becomes a critical issue. <br />2. Both primary and alternate drainfield sites have been <br />tested for Lot 1. The sites are generally on a peninsula of <br />higher ground extending from the proposed building site. <br />Both sites are substantially above the flood plain and are <br />acceptable for mound drainfiel. Both sites are more than <br />75' from the defined chan' «•' ■ ‘‘ creek. These sites are <br />designed for a 4-bedroom ^ could be lengthened if <br />necessary to accommodate a 5-b?ui.oom home. <br />3. Based upon the above information, I would recommend <br />approval of Lot 1 as a reasonable building site with <br />adequate sewage treatment sites. <br />4. Lot 2 is proposed to contain 2.83 acres, all of which is <br />dry buildable land. Two drainfield sites have been tested <br />directly east and northeast of the existing boarded up <br />house. Both these sites are acceptable for mound sewage <br />treatment systems.