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9 ' Rusty Olson's--Soil and Percolation Testing Joseph J. Olson--MPCA License#810 11481 Riverview Rd.NE,Hanover,MN 55341 (612)498-8779 August 23, 1997 3580 Watertown Rd. Orono, MN Henn.Co. 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 proposed future site would be classified an experimental mound system due to the excavated soils. The soils on this site are SCS.soils mapped-LT.B LeSueur Loam. The seasonally saturated soils were located at 30"-36"(mottled soil). Due to the seasonally saturated soils, a pressurized mound system will need to be installed to treat septic effluent. The bottom of the treatment area must be located at least 3' above the saturated soils. The soils at a depth of 12"have a percolation rate averaging 3 min/inch. Property lines must be identified prior to construction of this system. A variance will be needed to allow the proposed system to be closer than 20' to property line. A 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 weather proof enclosure. A warning device must be installed with light and sound device,this is in case of a pump failure. The manifold and supply fine pipe must have back drainage to the pumping chamber. The distribution pipes shall have their ends capped. Be sure the rock and sand fill materials are clean. The sod layer below the entire mounded area must be turned over,just break up the sod,be sure not to over work All neighboring wells are located greater than 100' away from the proposed treatment area. Keep all heavy equipment off of the proposed treatment areas before and after construction. The treatment area should be marked off before construction.This Design is not valid&the System will need to be relocated if failure to protect the areas proposed for On-Site Sewage Treatment occurs. Nothing other than gray water,(laundry,showers,etc.)human waste&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. It is recommended that you pump the tank every year for 1 tank every two years for two tanks. Due to the fact that there is only one standard septic site on this property it is recommended but not mandatory that a pretreatment system be installed on this system to help prolong the life of the system. /Z&A" Joseph J.Olson