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.. - _'� <br /> S�P •T''ESTING, INC. Steven B. Schirmers — MPCA Ce"h. No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 � (612) 497-35$6 <br /> May 21, 1994 <br /> Tandem Properties <br /> Lot 18, Block 1 <br /> Coffin site <br /> Orono, Henn. Co. , MN <br /> This On-Site Sewage Treatrrient System is Designed for a Type l, five <br /> bedroom home Designed in accordance with the Minnesota Pollution <br /> Control Agency Chapter 708G and Iocal ordinances . <br /> The soils on this site are SCS soils mapped - LrB - Lester loam. <br /> A seasonally high water table was located at 14" to 24" , (mottled <br /> soil ) . Due to the seasonally high water table, a Pressurized <br /> Mound System will need to be installed. The bottom of the rock <br /> bed must be located at least 3 ' above the seasonally high water <br /> table. <br /> The soils at a depth of 12" have a percolation rate averaging <br /> 19.3 min/inch. <br /> A pumping charnber will tieed to be installed to lift the effluent <br /> to the treatment area. <br /> The manifold and supply line pipe must have back drainage to the <br /> pumping chamber. The distribution pipes shall have their ends <br /> capped. Be sure the rock and sand fill material are clean. The <br /> sod layer below the entire mounded area must be turned over, just <br /> break up the sod, be sure not to over work. <br /> The power supply and switches must be located outside the manhole <br /> and pumping chamber in a weather proof enclosure. A warning device <br /> must be installed with a light and sound device, this is in case of <br /> a pump failure. (mercury floats are a good method) . <br /> All neighboring wells are located greater than 100 ' away from the <br /> proposed treatment area. <br /> CONT ' D <br />