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S-P TESTING, INC. Steven B. Schirmers — MPCA Cert. No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> May 19 , 1992 <br /> Nancy Bordson <br /> Lot 3 , Block 1 <br /> Orono Oaks <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 /> The soils on this site are SCS soils mapped - EnB - Erin loam. A <br /> seasonally high water table was located at 12" to 22" , (mottled <br /> soil ) . Due to the seasonally high water table, a Pressurized <br /> Mound system will need to be installed. The bottom of the rock <br /> bed must be located at least 3 ' above the seasonally high water <br /> table. The future expansion area will• be located on 6% to 10% slopes , <br /> (rock bed 6% to 8%) . This will need to be approved by City Officials . <br /> The soils at a depth of 12" have a percolation rate averaging <br /> 14 . 4 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 <br /> be installed with a light and sound device, this is in case of a pump <br /> failure. Mercury floats are a good method. <br /> All neighboring wells are located greater than 100 ' away from the <br /> proposed treatment area . <br /> CONT ' D <br />