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� ' ` <br /> S�P TESTING, INC. Steven B. Schirmers — MPCA Cert. No:K627 <br /> � <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> December 11, 1993 <br /> Coffin site <br /> Lot 7, Block 1 <br /> Orono, Henn. Co. , MN <br /> This On-Site Sewage Treatn�ent System is Designed for a Type l, five <br /> bedroom home in accordance with the Minnesota Pollution Control <br /> Agency Chapter 7080 and iocal ordinances . <br /> The soils on tYiis site are SCS soils mapped - LrB - L�ster loam_ <br /> bordered by - Ha - Hamel loam. A seaosnally high water table <br /> was located at 12" to 36" , (mottled soil ) . Due to the seasonally <br /> high water table, a Pressurized Mound System will need to be <br /> installed. The b�Ltom of the rock bed must be located at least <br /> 3 ' above the seas�nally hiqh water table. <br /> The � soils at a depth of 12" have a percolation rate averaging <br /> 8 . 2 min/inch. <br /> A pumping chamber will neeci to be installed to lift the effluent <br /> to the treatment area . <br /> The manifold and supply line pipe must have back drainage ta 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 Iight 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 />