1991-003809 - sewer system - Laserfiche WebLink

Home Browse Search

• S-P TESTING, INC. 951 KATYDID LANE ST. MICHAEL, MN 55376 497-3566 Steven B. Schirmers May 24, 1991 Anand & Marian Gopinath 705 Old Long Lake Rd. Orono, Henn. Co. , MN This On-Site. Sewage Treatment System is Designed for a Type 1, four bedroom home in accordance with the Minnesota Pollution Control Agency Chapter' 7080 and local ordinances. The soils on this site are typical of SC soils mapped - HbB - Hayden loam. A seasonally high water table was located at 24" , (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 12" have a percolation rate averaging 15.1 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 light and sound device, this is in case of a pump failure. (Mercury floats are a good method) . A lift pump will be needed in the lower level to keep the tanks shallow. This site has an existing failing system due to the high water table. The existing tanks are old & must be abandoned, pumped & filled with soil . The second tank is located under the garage concrete slab. Cont'd Soil and Percolation Tests Septic System Design