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S -P TESTING, INC. <br />951 KATYDID LANE <br />ST. MICHAEL, MN 55376 <br />497.3566 <br />STEVE SHIRMERS <br />October 26, 1986 <br />Dale Lindquist <br />780 No. Brown Rd. <br />Orono, Henn. Co., M,;. <br />This system is designed for a Type 1, five bedroom home and in accordance <br />with the Minnesota Pollution Control Agency standards xPC 40 and local <br />ordinances. <br />The soils on this site are typical of SCS soils napped - FtcC2 - Hayden clay <br />loam. A seasonally high water table was located at 16", 20", & 24", <br />(mottling). <br />This site has an existing failing system due to a strcnj clay soil with a <br />seasonally high water table within 2.5' of the surface. A pressurized <br />mound system would need to be installed but the slope of the land is great- <br />er than 164, which is too steep for a mound system. There is no system that <br />can be installed that will meet state and local codes. In a meeting with <br />the city inspector, the owner and myself, the conclusion was to design a <br />shallow trench system 18" deep with a holding tan< after the last trench <br />with an alarm system. This will be used as an overflow tank if the system <br />cannot ab.orb all the effluent during %he wet seasons. Also recommend to <br />oversize the system as much as possible. The L isting tanks I.:ust be pumped <br />and abandoned (collapse and fill with soil). <br />The soils at a depth of 18" & 24" have a percolation rate averaging 17.6 <br />min/inch and are adequate for treating septic effluent. <br />All neighboring wells are located mora than 100' away from the proposed <br />treatment area. <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 mark- <br />ed off before construction. <br />With proper installation and maintenance, this system should have no prob- <br />lem in treating septic effluent effectivel}'- <br />It is recommended that the septic tanks be pumped every 2 years. <br />stc�� II. Schirmers <br />Soil anti percolation Tette <br />Septic System Design <br />SBS/cis <br />