1989-09-28 Septic System Design Report

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Whitney MacMillan 1560 Fox. Street New House Parcel Orono, Henn. Co., S-P .TESTING, IA"C"S 951 KATY D i D LAN E ST. MICHAEL, MN 55376 . 497.3566 Steven B.- Sphirmers . 3000 & 2400 MN September 28, 1989 This system is Designed for a Type 1, four bedroom home and in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The soils on this site are typical of SCS soils mapped - KkC - Kilkenny loam. A seasonally high water table was located at 22", 24", 36" 48", (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 18" have a percolation rate averaging 12.4 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 manifold a:,d 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 more than 1001.away from the proposed treatment area. Keep all heavy equipment 'off of the proposed treatment area before and after construction as much as possible. The treatment area should be marked off before construction. Soil and Percolation Tests CONT' D Septic System Design