07/09/2021 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 9 810 11481 Riverview Rd. NE, Hanover, MN 55341 (763) 498-8779 Fax (763) 498-8290 July 9, 2021 Erik Schutz 250 Wakefield Road Orono, Hennepin County This on-site Sewage Treatment System is designed for a Type 1, five -bedroom home in accordance with the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. The periodically saturated soils were located at 38-48 Inches (mottled soil). Due to the periodically saturated soils, a pressurized dual rock bed at grade system 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. The rock bed will be divided into two 54 -foot -long rock beds. This system is designed as a non- level pressurized mound system using a gate valve to equalize the pressure. All neighboring wells are located greater than 100' away from proposed treatment area. The existing tanks need to be abandoned. A new 1250 and 1000 -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. Keep all heavy equipment off of the proposed treatment areas before during and after construction. The area around both sites must be fenced off by the contractor before any construction begins. This Design is not valid and the System will need to be relocated if failure to protect the areas proposed for On -Site Sewage Treatment occurs. 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. Garbage disposals are not recommended. Iron filters and water treatment systems cannot 20 into this system. 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. Sin cly, Joseph J. Olson