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Arne 16 2000 <br /> Re: Soil Boreings, Percolation Tests,System Design. <br /> We were retained by Brian Kerber to provide criteria for the design and installation of an on-site <br /> sewage system for the property located at 740 Orchard Road In the City of Orono. <br /> This design is based on a three bedroom,type one,single family home with maximum flaw of <br /> 450 gallons per day. <br /> A total of 6 soil borings and 4 perc tests were done. From these tests it was determined that a <br /> high water table exists at a depth of 18 inches below the ground surface. The high water table <br /> determines that only a mound type drainfield may be installed,to meet with code. <br /> The soils on this site are Erin Clay Loam,ErC2, 6 to 12%Slope as identified by the <br /> County soil map. Hennepin <br /> The system shall consist of the following: <br /> Two new 1000 gallon septic tanks <br /> -One new 1000 gallon pump chamber <br /> -675 square feet of rock bed,mound type drainfield <br /> -Upslope length of 93.5 feet <br /> -Width of 41 feet <br /> Materials needed for the mound construction include: <br /> -Clean washed sand 220 cubic yards <br /> -1.5 foot deep upsiope <br /> -1.8 feet deep-downslope <br /> -Clean washed rock,25 cubic yards <br /> -Sandy Loam soil,30 cubic yards <br /> -Top soil. 110 cubic yards <br /> The mound must be pressurized,therefore a pump must be installed that can pump 51 <br /> gallons <br /> per minute with a total head of 35 feet. An alarm system must also be installed to warn ofpump <br /> failure. <br /> The entire area that is to be used for the drainfield shall be protected from <br /> emy traffic to prevent <br /> any compaction priorto and during construction. Failure to do so shall resutt this design <br /> becoming VOID. At that lime the site may have to be tested again or an alternate site located <br /> and testing done. <br /> All neighboring wells are located greater than 100 feet from the proposed Tanfield site. <br /> intoNothing other <br /> deposed of s�eptr'csystemGwater �,showers etc.)humanposals waste&toilet tissue should be <br /> of more solids of a fine nature that may pass through the recommended due to the ad los <br /> ung & hiorine may kill the bacteria needed to treat Excess amounts ptic effluent.uerrt.Adai tsoap, <br /> kind must not be used. They may cause damage to the system. soap, <br /> of any <br /> it is recommended to pimp and service the septic tanks every two to three yews for maximum <br /> life of the system. <br />