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Joseph Olson D.B.A. <br />Rusty Olson's--Soil and Percolation Testing <br />Joseph J. Olson--MPCA License # 810 <br />11481 Riverview Rd. NE, Hanover, MN 55341 <br />(763) 498-8779 Fax (763) 498-8290 <br />May 23, 2019 <br />Todd Urness <br />2630 Countryside Drive <br />Orono, Hennepin County <br />To whom it may concern, <br />I was contacted by Todd Urness to design new septic tanks for the house at 2630 <br />Countryside Drive. In the City of Orono. The results of the design are as follows. <br />The existing mound septic system was installed in 1995 and has an approximately 10 X <br />63 -foot rock bed that is compliant, 2- approximately 1300 -gallon septic tanks and 1 -1300 -gallon <br />lift station. The existing tanks are non -watertight and must be replaced. The existing grade at the <br />first existing tank is at elv-99.3 The top of the existing first tank is at elv-97.9. The top of the <br />existing lift station is at elv-97.5. This design proposes the existing tanks be removed and a new <br />2250 -gallon combination septic tank and a 1300 -gallon lift station be replaced in the same <br />location. The top of the new tanks needs to have 2.0 feet of cover over them. This will put them <br />0.6 feet deeper than the existing tanks. The original design pump curve will stay the same. <br />See the two drawings for the location of the existing tanks and new tanks. <br />If you have any questions please call. <br />Sincerely, <br />Joseph J. Olson <br />