1993-12-10 Septic System Design Report

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S-P TESTING, INC. Steven B. Schirmers — MPCA Cert. N,o. 627 Coffin Site Lot 2, Block 1 Orono, Henn. Co., MN 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 December 10, 1993 This On -Site Sewage Treatment System is Designed for a Type 1, five bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 708C and local ordinances. The soils on this site are SCS soils mapped - KkB - Kilkenny loam. A seasoriall}l hich water table was located at 22" to 44", (mottled soil). Cue to i.iit aeas3null h h otnr *�h��; a Pressurized Mound system will need to be installed. The bottom of the rock bed :rust be located at least 3' above the seasonally high water table. The future expansion is at: the bash of a slope and to keep the absorption area of the mouri-? 75' from a wetland, approximately 1/3 of the upslope portion of the mound will be or, 6 to 8% slope. This will need tc he approved by city officials and rust remain future expansion ::n!y. The soils at a depth of 12" have a percolation rate averaging 6.8 min /inch. A pumping chamber will need o be installed to lift the effluent to the treatment area. _.ie 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 an,' pumping chamber in a weather proof enclosure. A warning dt-!vice must be installed with a light and sound device, this is in case of a pump failure. Mercury floats are a qood method.