1990-05-25 Septic System Engineering Report

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S -P TESTING, INC. 951 KATYDID LANE ST. MICHAEL, MN 65379 4073696 Steven B. Schirsere May 25, 1990 Jim Olson 4360 Bayside Rd. Orono, Henn. Co., MN This system is Designed for a Type 1, three bedroom home and in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. This site has an existing system with a surface outlet which is not a legal system and is considerd a failing system. The Olsons bought the home In the fall of 85'. This system would have been illegal at that time also. The soil condidtions would be the same today as in 1985. The soils on this site are typical of SCS soils mapped - KkB - Kilkenny loam. A seasonally high water table was located at 18", 28" t 300, (mottled soil). Due to the seasonally high water table, a Pressurized Mound System will need to be installed. The bottom of the rock bed must be located at least 3' above the seasonally high water table. The soils at a depth of 12" have a percolation rate averaging 5.4 min/inch and are adequate for treating septic effluent. A pumping chamber will need to be installed to lift the effluent to the treatment area. The existing tanks are a block type s will need to be replaced. Pump 1� fill with soil. The manifold and supply line pipe must have back drainage to the pumping chamber. The distribution pipes shall have their ends capped. Be sure the rock and sand fill material are clean. The sod layer below the entire mounded area must be turned over, just b►eak up the sod, be sure not to over work. The power supply and switches must be located outside the manhole and pumping chamber in a weather proof enclosure. A warning device must be installed with a light and sound device, this is in case of a pump failure. (Mercury floats are a good method). CONT'D Self and Percolation Toole Sepik System Design