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Memo <br />To: Melanie Curtis <br />From: Willie Gibbs Onsite Septic Manager <br />Date: September 5, 2006 <br />Re: Septic Design for 560 Big Island <br />City of Orono <br />Melanie, the septic design for 560 Big Island is not adequate for the house plans that have <br />been submitted for review. The septic designer has called for the design to be sized for a <br />three bedroom type II residence. The Orono Septic Code has already been varied since this <br />is a new residence and the Code calls for a primary and secondary site capable of supporting <br />a 5 bedroom house, not 3. The limitations for allowing a residence to vary from a 5 to 3 <br />bedroom septic system was allowed due to the limitations of the lot and it be limited to <br />seasonal use. I have no problem with this part of it. <br />The designer then downsizes the drainfield even more by calling the residence a type II <br />under Minnesota Rules Chapter 7080. To be classified as a type II residence the total floor <br />area must be between 500 and 800 square feet per bedroom and no more than 2 water use <br />appliances. The proposed house has 790 square feet per bedroom but includes at least <br />three water use appliances as per the submitted plans. If the drainfield cannot be made <br />larger to accommodate the type of house plan submitted, then the house plan needs to <br />change to accommodate the limitations of the septic system. <br />The septic tank capacity also needs to be increased to 2-1000 gallon septic tanks in place of <br />the 1500 gallon tank in the design.