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• <br /> • <br /> • S-P TESTING, INC. <br /> 951 KATYDID LANE <br /> ST. MICHAEL, MN 55376 <br /> 497-3566 <br /> STEVE SHIRMERS <br /> August 31, 1987 <br /> Dave Guimand <br /> 2900 Watertown Rd. <br /> Orono, Henn. Co. , MN. <br /> This system is designed for a Type 1, Five bedroom home and in accordance <br /> with the Minnesota Pollution Control Agency standards )C' 'gO and local <br /> ordinances . <br /> The soils on this site are typical of SCS soils mapped - LrB - Lester loam. <br /> A seasonally high water table was located at 22" & 24" , (mottling) . Due to <br /> the seasonally high water table , a pressurized mound system will need to be <br /> installed. The bottom of the rock bed must be located at least 3 ' above <br /> the seasonally high water table. <br /> The soils at a depth of 18" have a percolation rate averaging 7. 5 min/inch <br /> and are adequate for treating septic effluent. <br /> The existing tank is old and must be abandonded, pump & fill with soil . <br /> A pumping chamber will need to be installed to lift the effluent to the <br /> treatment area. <br /> The manifold and supply line pipe must have back drainage to 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 be <br /> installed with a light and sound device , this is in case of a pump failure. <br /> (Mercury floats are a good method) . <br /> All neighboring wells are located more than 100 ' away from the proposed <br /> treatment area.•and 50 ' away from the new tanks and 100 ' away from the <br /> treatment area on this site. <br /> Keep all heavy equipment off of the proposed treatment area before and <br /> after construction as much as possible. The treatment area should be <br /> marked off before construction. <br /> • <br /> With proper installation and maintenance, this system should have no <br /> problem in treating septic effluent effectively. <br /> It is recommended that the septic tanks be pumped every 2 years . <br /> Soil and Percolation Tests ..,--± e.)• <br /> Septic System Design Steven B. Schirmers <br /> SBS/ds <br />