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4—Bedroom City of Orono Septic Plan Review <br />2-10 X 25 Rock Beds Reviewer �� <br />1-1300 Pump tank All work shall be done in full compliance <br />with all applicable septic and zoning code. <br />1-2250 Septic Tank Joseph Olson D.B.A. <br />Rusty Olson's--Soil and Percolation Testing <br />29 GPM pump Joseph J. Olson--MPCA License # 810 <br />24 #TDR 11481 Riverview Rd. NE, Hanover, MN 55341 <br />(763) 498-8779 Fax (763) 498-8290 <br />May 16, 2018 <br />Dave Mariani <br />1180 Homestead Trail <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 10-22 inches (mottled soil). Due to the periodically <br />saturated soils, a pressurized mound system will need to be installed to treat the septic effluent. The bottom <br />of the treatment area must be located at least 3' above the saturated soils. The future system is a type 111 <br />because fill soils and less than 12 inches of original soils.. The fill soils will need to be removed if the <br />system is ever used. <br />Both septic sites are partially in the Great River Energy power line easement. A variance to encroach into <br />that easement from Great River Energy has been applied for. See attached application. <br />Due to limited space. The mound rock bed must be split into two 25 -foot rock beds. The absorption area of <br />the proposed systems does not overlap. <br />This system is designed as a non- level pressurized mound system using gate valves to equalize the <br />pressure. Use 7/32 -inch perforations on the laterals. <br />The soils at a depth of 12" have a percolation rate averaging 10.6 MPI. <br />All neighboring wells are located greater than 100' away from proposed treatment area. <br />A new 2250 -gallon septic tanks are to be installed. All tanks need to be insulated if there is less than two <br />feet of cover over the top of the tanks. Clean outs must be installed on the end of the Laterals for <br />maintenance. <br />A 1300 -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. A flow measurement device must be installed. Including but not limited to a water meter, event <br />counter, running time clocks or electronically controlled dosing. <br />Keep all heavy equipment off of the proposed treatment areas before, during and after construction <br />Nothing other than gray water. (laundry, showers, etc.) Human water and toilet tissue should be <br />disposed of into the sentic tanks. Garbage disposals are not recommended Additives must not be <br />used, they may cause harmful damage to your septic system. Iron filters must not go into the system <br />It is recommended that you pump the tank every two vears for two sentic tanks. <br />Sin rely, <br />Joseph J. Olsan <br />