07-20-2019 Septic Design - Laserfiche WebLink

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Joseph Olson D.B.A. Rusty Olson's--Soil and Percolation Testing Joseph J. Olson--MPCA License # 810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 July 20, 2019 Arla Engleman 315 Old Crystal Bay Road N. Orono, Hennepin County This on-site Sewage Treatment System is designed for a Type 1 four-bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The periodically saturated soils were located at 14-20 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 existing septic tanks must be abandoned and a 2250 -gallon septic tank needs to be installed or equivalent capacity. The existing supply line from the house to first tank may be cast iron. Remove as much of the cast iron pipe as possible and replace it with plastic pipe. Use 7132 Inch perforations must be used on the laterals. 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 1250 -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. With proper installation and maintenance, this system should have no problem in treating septic effluent effectively. Nothing other than gray water, (laundry, showers, etc.) Human water and toilet tissue should be disposed of into the septic tanks. Iron filters cannot go into the septic sstem. Garbage disposals are not recommended. Additives must not be used they may cause harmful damage to your septic system. It is recommended that you pump the septic tanks every two years. Sincerely, L- / Joseph J. Olson