1991-003885 - septic system - Laserfiche WebLink

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S-P TE S TING, INC. 951 KATYDID LANE ST. MICHAEL, MN 55376 497-3566 Steven B. Schirmers May 16 , 1991 Mimi Ryerse 335 Old Crystal Bay Rd . Orono, Henn. Co. , MN This On-Site Sewage Treatment System is Designed for a Type 1, three bedroom home•'in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances . The soils on this site are typical of SCS soils mapped - LrB - Lester loam. A seasonally high water table was--located at 22" & 28" , (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. This site has an existing system which is located in strong clay soil with a high water table. The existing tank or tanks are old & must be abandoned, Pumped & filled with soil . A variance will be needed ior a property line setback of 10 ' & a 10 ' setback from the existing garage, slab on grade. • The soils at a depth of 12k' have a percolation rate averaging 3. 5 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 li a pipe must have back drainage to the pumping chamber. The distributionlpipes 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 Soil and Percolation Tests Septic System Design