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2250,1300 10 X 50 Joseph Olson D.B.A. 29 GPM Rusty ©lson's--Soil and Percolation Testing 13' TDH Joseph J. Olson--MPCA License # 810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 City of Orono Septic Plan Review December 20, 2017 ��,✓% William Jenney Reviewer: 1320 Orono Oaks Drive All work shall /Jbe done in full compliance Orono, Hennepin County with all applicable septic and zoning code. This on-site Sewage Treatment System is designed for a Type III four-bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The system is a type III because Fill soils and existing system. The existing system is not overloaded. The proposed new system should be built over the top of the existing system. Break the lines between the drop boxes. The periodically saturated soils were located at 16-18 inches (mottled soil). Due to the periodically saturated soils, a pressurized mound system with 6 inches of rock will need to be installed to treat the septic effluent. The bottom of the treatment area must be located at least 3' above the saturated soils. This system is designed with 6 inches of rock The existing septic system does not conform to the state code chapter 7080 All neighboring wells are greater than 100' from proposed treatment areas. The soils at a depth of 12" have a percolation rate averaging 10 MPI. The existing septic tanks must be abandoned and a 2250 -gallon septic tank needs to be installed. All new tanks need to be insulated if there is less than two feet of cover over the top of the tanks. Clean outs must be installed on the end of the laterals for maintenance. A 1300 -gallon pumping chamber will need to be installed to lift the effluent to the treatment area. The power supply and switches must be located outside the manhole and pumping chamber in a weatherproof enclosure. A warning device must be installed with light and sound devices; this is in case of a pump failure. A flow measurement device must be installed. Including but not limited to a water meter, event counter, running time clocks or electronically controlled dosing. Nothing other than grav water, (laundry, showers etc.) Human water and toilet tissue should be disposed of into the septic tanks. Garbage disposals are not recommended. Additives must not be used, they may cause harmful damage to your septic system. Iron filters must not go into the system It is recommended that you pump the tank every two years for two septic tanks Sincerely, Joseph J. Olson