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... �i • : � , <br /> S-P TESTING, INC. ste�e� B. Schirmers — MPCA Cert. No. 62� <br /> 951 Katydid Lane NE • St. Michael, MN 55376 • (612) 497-3566 <br /> p ��� <br /> . �o <br /> � �c��ad� <br /> . June 26, 1992 <br /> Dick Nigon <br /> 445 Spring Hill Rd. �.lUL 1 6 1992 <br /> Orono, Henn. .Co. , MN , .,� _ _ __ <br /> This On-Site Sewage Treatment System is nesigned for a Type l, four <br /> bedroom home in accordance with the Minnesota Pollution Control <br /> Agency Chapter 7080 and local ordinances . <br /> The soils on this site are SCS soils mapped - HcC2 - Hayden clay <br /> loam. A seasonally high water table was located at 54" to 68" , <br /> (mottled soil) below the ground surfac�. F. Standard Trench <br /> System may be installed. The bottom of each trench must be <br /> located at least 3 ' above the seasonally high water table. <br /> The soils at a depth of 18" to 30" have a percolation rate averaging <br /> 9 .7 min/inch and are adequate for treating septic effluent. <br /> A pumping chamber will need to be installed to lift the effluent to the <br /> treatment area. <br /> The power supply and switches must be located. outside the manhole and <br /> pumping chamber in a weather proof enclosure. A warning device must <br /> be installed with a light and sound device, this is in case of a pump <br /> failure. Mercury floats are a good method. The supply line pipe <br /> must have back drainage to the pumping chamber. <br /> This site has an existing failing system with surface discharge. The <br /> existinq tank is old & may need to be abandoned, pumped & filled with <br /> soil . ' <br /> All neighboring wells are located greater than 100' away from the <br /> proposed treatment area & greater than 75 ' away on this site. <br /> Keep all heavy equipment off of the proposed treatment area before and <br /> after construction. The treatment area should be marked off before <br /> construction. This Design is not valid & the System will need to <br /> be relocated if failure to protect the areas proposed for On-Site <br /> Sewage Treatment occurs. ' <br /> CONT'D <br />