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„ , ,7��P TESTING� �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 /> Aprii 29, 1998 <br /> Bryce Johnson <br /> 580 North Arm Drive <br /> Orono, Henn. Co., MN <br /> This site has an existing on-site sewage treatment system which is classified as failed <br /> due to not meeting a 3' separation from the bottom of the system and the mottled soil <br /> (highest known saturated soil). <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 - KkB - Kilkenny loam. The seasonally <br /> saturated soils were located at 22” to 30" (mottled soil). Due to the seasonally saturated <br /> soils, a Pressurized Mound System will need to be installed to tneat septic effluent. The <br /> bottom of the treatment area must be located at least 3' above the saturated soils. The <br /> northeast comer of the system has 6"to 12" of fill soil with the original soil not being <br /> compacted. The fill soil will need to be removed with a backhoe prior to pfacing the <br /> washed sand for the mound. City approval will be needed to have the system 10' from <br /> the property line along North Arm Drive and the existing driveway. <br /> The soils at a depth of 12" have a peroolation rate averaging 9.5 mpi. <br /> The existing pumping chamber may be used upon approval from the local Inspector, the <br /> tank must be water tight. The pump may be used if it meets the required pump curve, <br /> gal/min & head pressure. The power supply and switches must be tocated outside the <br /> manhole and pumping chamber in a weather proof enclosure. A waming device must be <br /> installed with a light and sound device, this is in case of a pump failure. <br /> 1 <br />