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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 /> December 22, 1997 <br /> Doug Hart <br /> 3280 Watertown Rd. <br /> Orono, Henn. Co., MN <br /> This site has an existing on-site sewage treatment system classified as failed due to not <br /> meeting a 3' separation from the bottom of the system and the saturated soil. The <br /> existing system is 2-1/2' deep with mottled soil found at 24" to 30" deep. To adequately <br /> treat septic effluent, a new system will need to be installed. <br /> This on-site sewage treatment system is designed for a Type 1, four 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 - LrB - Lester loam. The seasonally <br /> saturated soils were located at 34" & 36" (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. <br /> The soils at a depth of 12" have a percolation rate averaging 4.1 mpi. <br /> The existing 1 st tank is a block type and less than 50' from the existing well and will <br /> need to be abandoned, pumped and filled with soil. The 2nd tank is a newer tank and <br /> may be used if water tight. <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 /> 1 <br />