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. r ' � , . '' ' � • , �� S-P TE S TING, INC. � 951 KATYDID LANE. ' ST. MICHAEL, MN 65376 497-3566 , Steven B. Schirmers_ . May 29, 1991 Dale Pfeilsticker � � OP� . . �� 1830 Lakeview Terrace � .� Orono, Henn. Co. , MN . This On-Site ,Sewage Treatment System is �esigned for a Type l, three bedroom home in accordance with the Minnesota Pollution Control Agency Chapter:7080 and local ordinances. _ _. The soils on this site site are typic�l of SCS soils mapped - HbB - . Hayden loam bordered by - ErB2 - Erin clay loam. A seasonally hiqh water table was located at 18" , 20" & 26" , (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 tahle. . . The soils at a depth of 12" have a percolation rate averaging 8.7 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 liqht and sound device, this is in case of a pump failure. (Mercury floats are a good method) . This site has an existing failing system due to high water table, strong clay soils & .fill soil . Over the winter of 1990-91, the system was surface �discharging. This spring the system was no longer surfacing. A boring into the rock indiated effluent 12" over the rock, this is a sign of• system failure. � � . CONT'D So�t and Percolatlon Teiti Septic Syste�n De�ign