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S-P TESTING, INC. <br /> 951 KATYDID LANE <br /> ST. MICHAEL, MN 55376 <br /> 497-3566 <br /> Steven B. Schirmers <br /> July 11, 1991 <br /> Bob Roden <br /> 460 Orchard Park Rd. <br /> Orono, Henn. Co. , MN <br /> This On-Site Sewage Treatment System is Designed for a Type 1, four <br /> bedroom home in accordance with the Minnesota Pollution Control <br /> Agency Chapter 7080 and local ordinances: <br /> This site has an existing failing system due to strong clay soils <br /> with a high seasonally high water table. The existing tanks may <br /> be used upon approval by the local Inspector. <br /> The soils on this site are SCS soils mapped - EnC - Erin loam. A <br /> seasonally high water table was located at 26" , (mottled soil ) . Due <br /> to the seasonally high water table, a Pressurized Mound System will <br /> need to be installed. The bottom of the rock bed must be located at <br /> least 3 ' abovethe seasonally, high water table. <br /> The soils at a depth of 12" have a percolation rate averaging 9. 8 <br /> min/inch and are adequate for treating septic effluent. <br /> A pumping chamber will need to be installed to lift the effluent to the <br /> treatment area. <br /> The manifold and supply line pipe must have back drainage to the pumping <br /> chamber. The distribution pipes shall have their ends capped. Be sure <br /> the rock and sand fill material are clean. The sod layer below the <br /> entire mounded area must be turned over, just break up the sod, be sure <br /> not to over work. <br /> The power supply and switches must be located outside the manhole and <br /> pumping chamber in a weather proof enclosure. A warning device must be <br /> installed with a light and sound device, this is in case of a pump failure. <br /> '(Mercury floats are a good method) . <br /> CONT'D <br /> Soil and Percolation Tests <br /> Septic System Design <br />