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02/19:11999 08: 41 4791547 vi ILKENAHT PAGE 01 January 19 , 1999 Bruce Clark 625 Old Long Lake Rd Wayzata Mn 55391 Re : Consultation on Septic System Dear Mr Clark : After our meeting on 1-14-99 and a quick review of your property, I did a proposed design for a new mound system. In doing so I made a few assumptions , and they are 1 . Approximate location of property lines . 2 . Depth of seasonal high water table is below 24 inches 3 . Approximate location of old system was pointed out by yourself . Due to frost we were not able to probe for actual location. 4 . There will be room to install new tanks without disturbing any soil in the proposed mound ares . 5 . The total water usage in the house can be limited to 600 gallons per day . 6 . The land slope is 4 to 5 % With these assumptions in mind and allowing for a 10 foot side yard setback , A 10 foot rear yard setback , and a 20 foot setback from the new addition this leaves a useable area of 34 foot by 70 feet . - A Minimum mound design for 600 gallons per day without any margin for extra ordinary use , such as special events , would require an area 38 feet by 77 feet . With this information in mind it seems that there are a couple of options to resolve the problem at hand . 1 . Obtain variances to be able to place the mound closer to the property lines . 2 . Lower the water usage in the house to be able to make the mound smaller . 3. Install a timer and an overflow tank to collect any extra effluent that the mound cannot handle . This overflow tank will then have to be treated as a holding tank and pumped as needed . The three recommendations listed above may be expanded upon after further research. I hope the work that we have done here will be of help to you . If I can be of any further assistance please feel free to contact me . Thank. You . 3speo full 4f ob V l encu , MPCA # 56