1992-004604 - replace drnfld/or tank

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• , • • S=P TESTING, INC. Steven B. Schirmers — MPCA Cert. No. 627 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 • June 10, 1992 Harry Martin 685 Old Long Lake Rd. Orono, Henn. Co. , MN • This On-Site Sewage Treatment System is Designed for a Type 1, four bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The soils on this site are SCS soils mapped - HbC - Hayden loam bordered by - Gc - Glencoe silty clay loam. A seasonally high water table was located at 14" to 22" , (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 proposed mound site is located in a low area. This is the only area available. All surface run off & drainage to the east must be diverted around the system. This site has an existing failing system due to the clay soils with a high seasonally high water table. The existing tanks may be used upon approval by the local Inspector. The soils at a depth of 12" have a percolation rate averaging 6.2 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 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 break 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. All neighboring wells are located greater than 100 ' away from the proposed treatment area. CONT'D