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. � <br /> S�� T,�STING, INC. Steven B. Schirmers — MPCA Cert. No. 627 <br /> 951 Katydid Lane NE • St. Michaei, MN 55376 • (612) 497-3566 <br /> b <br /> September 24 , 1993 �.�A,�� <br /> , <br /> Garth Johnson <br /> 1000 Heritage Lane <br /> Orono, Henn. Co. , MN <br /> This On-Site Sewage Treatment System is Designed for a Type l, 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 - HeB - Heyder sandy loam <br /> & LrB - Lester loam. A seasonally high water table was not present <br /> in the area of the proposed system. <br /> This site has an existing non-conforming system due to a seasonally <br /> high water table less than 36" below the bottom of the treatment <br /> area, fill soils & in a drainage pattern. The existi�g tanks are <br /> recorderd at the city as block type and will need to be abandoned, <br /> pumped & filled with soil . <br /> The soils at a depth of 30" have a percolation rate averaging <br /> 11. 5 min/inch. A Standard Trench System may be installed. <br /> A pumping chamber will need to be installed to lift the effluent <br /> to the treatment area. <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. The supply line pipe <br /> must have back drainage to the pumping chamber. <br /> All neighboring wells are located greater than 75 ' away from the <br /> proposed treatment area. <br /> CONT ' D <br />