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Dan Hoffman <br />Lot 2, Block <br />Foxhill <br />Orono, Henn. <br />E <br />Co., MN <br />951 KATYD!D :ANc, <br />ST. M!Ct:Ac! , .V.N 55375 <br />497-3563 = •- <br />$'-even 3. Schirme�w;� <br />April 19, 1989 <br />A site evaluation was completed for a Future expansion area for a <br />Sub -Division. <br />This system is Designed for a Type 1, four bedro --me and in accordance <br />with the Minnesota Pollution Control Agency Chap 7080 and local <br />ordinances. <br />The soils on this site are typical of SCE soils Tapped - HeB - Heyder <br />sandy loam. A seasonally high water table was located at 60" & 64", <br />(mottled soil). ".he bottom of each trench must be located at '_east <br />3' above the seasonally high water table. <br />The existing system is located west of the house. The soil west of <br />the existing system are fill soils and are not adequate for expanding <br />the existing system. The flow line from the 2nd tan;. is approx. 42" <br />below the ground surface & is too deep for a gravity :.ystem. The area <br />north of the house is adequate for a standard treatment system. <br />The soils at a depth of 24" have a percolation rate aver:tng 4.1 loin/inch. <br />Each trench will need to be over excavated a minimum of 12" and be <br />replaced with uncompacted loamy sand. This liner is -needed to .;low the <br />effluent down for treatment. If. :rop boxes are used with a minimum of <br />4 trencht-. this liner is not needed. <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 mist be <br />installed with a light and sound device, this is in case of a pump failure. <br />(Mercury floats.are a good method). The supply line pipe must nave back <br />drainage to the pumping chamber. <br />All neighboring wells are located more than 100' away from the proposed <br />treatment area. <br />' CONT'D <br />Soil and Percolation Text - <br />Septic System Design <br />