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- rotect the treatment area <br />- from disturbance, <br />compaction, or other damage <br />by staking, Fencing, etc. <br />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 Cell (612) 296-7715 <br />Revised April 5, 2022 <br />Swanson Homes <br />625 Pinehurst Court <br />Orono, Hennepin County <br />This on-site Sewage Treatment System is designed for a Type 1, Four-bedroom home in accordance with <br />the Minnesota Pollution Control Agency Chapter 7080 and local ordinances. <br />The periodically saturated soils were located at 16-24 inches (mottled soil). Due to the periodically <br />saturated soils, a pressurized mound system with 6 inches of rock will need to be installed to treat the septic <br />effluent. The bottom of the treatment area must be located at least 3' above the saturated soils. This system <br />is designed with 6 inches of rock. <br />The soils at a depth of 12" have a percolation rate averaging 16 MPI. <br />A 2250 -gallon septic tank or its equivalent needs to be installed. All tanks need to be insulated if there is <br />less than two feet of cover over the top of the tanks. Clean outs must be installed on the end of the laterals <br />for maintenance. <br />Use 7/32- inch perforations on the laterals. <br />A 1250 -gallon pumping chamber will need to be installed to lift the effluent to the treatment area. The <br />power supply and Switches must be located outside the manhole and pumping chamber in a weatherproof <br />enclosure. A warning device must be installed with light and sound devices; this is in case of a pump <br />failure. The manifold and supply line must have back drainage to the pumping chamber. <br />Keen all heavy equipment off of the proposed treatment areas before during and after construction. <br />The area around both sites must be fenced off by the contractor before any construction beLyins. <br />With proper installation and maintenance, this system should have no problem in treating septic effluent <br />effectively. Nothing other than gray water, (laundry, showers, etc.) Human water and toilet tissue should be <br />disposed of into the septic tanks. Iron filters and large discharge water treatments stems cannot go <br />into the septic system. Garbage disposals are not recommended. Additives must not be used they may <br />cause harmful damage to your septic system. It is recommended that you pump the septic tanks every two <br />years. <br />Sincerely, <br />Joseph J. Olson <br />