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S-P TESTING, INC. Steen S. Schirmers — MPCA Cert. No. 627 <br />951 Katydid Lane NE * St. Michael, MN 65376 • (612) 497-3566 <br />December 13, 1993 <br />Coffin site <br />Lot 8, Block 1 <br />Orono, Henn. Co., MN <br />This On -Site Sewage Treatment System is Designed for a Type 1, five <br />bedroom home in accordance with the Minnesota Pollution Control <br />Agency Chapter 7080 and local ordinances. <br />The soils on this -A-*-_* are SCS soils :napped - KkB - Kilkenny loam <br />& LrB - Lester loaff. A seasonally high water table was located <br />at 24" to 30", (mottled soil). Due to the seasonally high water <br />table, a Pressurized Mound System will need to be installed. <br />The bottom of the rock bed must be located at least 3' above the <br />seasonally high water table. <br />The soils at a depth of 12" have a percolation rate averaging <br />5.9 min/inch. <br />A pumping chamber will need to be installed to lift the effluent <br />to the treatment area. <br />The manifold and supply line pipe must have back drainage to the pumping <br />chamber. The distributir.)n 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 />