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J-P TESTING, INC. Steven B. Schirmers • MPCA Cert.No. 627 <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> FAX (612)-497-5011 <br /> State License #394 <br /> November 29, 1999 <br /> Johnson Property <br /> Lot 1 & part of Lot 2 <br /> 4300 Watertown Rd. <br /> Orono, Henn. Co., MN <br /> This on-site sewage treatment system is designed for a Type 1, five bedroom home, in <br /> accordance with the Minnesota Pollution Control Agency Chapter 7080 and local <br /> ordinances. <br /> The soils on this site are SCS soils mapped - LmB - Lerdal loam. The seasonally <br /> saturated soils were located at 16" to 40" (mottled soil). Due to the seasonally saturated <br /> soils, a Pressurized Mound System will need to be installed to treat septic effluent. The <br /> bottom of the treatment area must be located at least 3' above the saturated soils. the <br /> length of the rock bed would be reduced approximately 13' per bedroom removed. <br /> The soils at a depth of 12" have a percolation rate of 3.5 mpi. <br /> A lift pump will be needed in the lower level to keep the tanks shallow. <br /> A pumping chamber will need to be installed to lift the effluent to the treatment area. <br /> The power supply and switches must be located outside the manhole and pumping <br /> chamber in a weather proof enclosure. A warning device must be installed with a light <br /> and sound device, this is in case of a pump failure. <br /> The manifold and supply line pipe must have back drainage to the pumping chamber. <br /> The distribution pipes shall have their ends capped. Be sure the rock and sand fill <br /> material are clean. The sod layer below the entire mounded area must be turned over, <br /> just break up the sod, be sure not to over work. <br /> 1 <br />