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Joseph Olson <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 Cell (612) 296-7715 <br />March 9, 2026 <br />2265 Devin Lane <br />Orono, Hennepin County <br />To whom it may concern, <br />I was contacted by Mark Hanson to check if the existing septic system at the property of <br />2265 Devin Lane in the City of Orono is an imminent threat to public health. There is no sign of <br />septic effluent surfacing. Therefore, it is not an imminent threat to public health at this time. <br />The pump to the existing mound system is unplugged on 3/08/2026. The system is now a <br />holding tank system. This is a compliant septic system. There is an alarm in the third 1000- <br />gallon tank that will trigger a warning light and a buzzer in the house when the tank fills up with <br />approximately 300-gallons. That means you have approximately 700-gallons time for the owner <br />to call the pumper to come out and empty the tanks. <br />There is a design to fix the existing septic system. Once it is repaired it will be a <br />compliant mound septic system. <br />If you have any questions please call. <br />Sincerely <br />Joseph J. Olson <br />