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, ,�<: <br /> , ' '� <br /> . . :�� <br /> April 15 1999 <br /> Re: Soil Boreings, Percolation Tests, System Design. <br /> We were retained by Rich Valiton to provide criteria for the design and installation of an on-site <br /> sewage system for the property located at 2135 County Rd 6 , In the City of Orono <br /> This design is based on a four bedroom, type one, single family home with maximum flow of <br /> 600 gallons per day. <br /> A total of 2 soil boreings and 2 perc tests were done. From these tests it was determined that a <br /> high water table exists at a depth of 30 to 35 inches below the ground surFace. The high water , r <br /> table determines that only a mound type drainfield may be installed. <br /> The soils on this site are Hayden Clay Loam HcB2, 2 to 6% Slope as identified by the <br /> Hennepin County soil map. <br /> The system shall consist of the following: <br /> -Two new 1000 gallon septic tanks <br /> --One new 1000 gallon pump chamber <br /> -548 square feet of rock bed, mound type drainfield <br /> -Upslope length of 77 feet <br /> -Width of 37 feet <br /> Materials needed for the mound construction include: <br /> -Clean washed sand 100 cubic yards <br /> -1 foot deep upslope <br /> -1.3 feet deep-downslope <br /> -Clean washed rock, 21 cubic yards <br /> -Sandy Loam soil, 18 cubic yards <br /> -Top soil, 100 cubic yards <br /> The mound must be pressurized, therefore a pump must be installed that can pump 40 gallons <br /> per minute with a total head of 23 feet. An alarm system must also be installed to warn of pump <br /> failure. <br /> The entire area that is to be used for th�drainfield shall be protected from any traffic to prevent <br /> any compaction prior to and during construction. Failure to do so shall result in this design <br /> becoming VOID. At that time the site may have to be tested again or an alternate site Iocated <br /> and testing done. <br /> All neighboring wells are located greater than 100 feet from the proposed drianfield site. <br /> Nothing other than gray water (laundry, showers etc.) human waste &toilet tissue should be <br /> disposed of into the septic system. Garbage disposals are not recomended due to the addition <br /> of more solids of a fine nature that may pass through the system. Excess amounts of soap, <br /> cleaning agents& chlorine may kill the bacteria needed to treat septic effluent. Additives of any <br /> kind must not be used. They may cause damage to the system. <br /> It is recommended to pump and service the septic tanks every two to three years for maximum <br /> life of the system. <br /> All requirements of this design must be followed in order for the system to perform to the design <br /> ; '. <br />