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� . `-P TES TING� I NC. 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 /> August 30, 1996 <br /> ��� � . � i <br /> unlap �c.,+.�c� Lt,1 i I 1 �►c�r»� �...�,R � <br /> 951 Spring Hill Rd. <br /> Orono, Henn. Co., MN <br /> This on-Site Sewage Treatment System is Designed for a Type 1, four bedroom home, <br /> in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local <br /> ordinances. <br /> This site has an existing system consisting of two tanks and trenches or a seepage bed. <br /> Soil Borings indicate mottled soil less than 3' below the ground surface which would put <br /> the bottom of the system less than 3' away from the saturated soil & is classified as <br /> failed. <br /> The soils on this site are SCS soifs mapped - HbD - Hayden loam bordered by - Ha - <br /> Hamel loam.. The seasonally saturated soils were located at 16" to 20" (mottled soil). <br /> Due to the seasonally saturated soils, a Pressurized Mound System will need to be <br /> installed to treat septic effluent. The bottom of the treatment area must be located at <br /> feast 3' above the saturated soils. <br /> Due to the limited space available on this lot, the system will need to be less than 75' <br /> away from Long Lake (Recreational Lake). A 50' setback will be needed and will require <br /> a variance from the City of Orono. <br /> The soils at a depth of 12" have a percolation rate averaging 2.1 mpi. The system is <br /> Designed for the type of soil using a sizing factor for clay loam. <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 />