11-16-1992 Planning Packet - Laserfiche WebLink

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To:Jeanne A. Mabusth, Building & Zoning Administrator Stephen Weckman, On-Site Systems Manager Date November 2, 1992 Subject: Septic Review - Application #1745, David Carlson Both 610 and 620 Big Island have cabins which are not attached to on-site sewage treatment systems. Human wastes are treated by outhouses which are located very near lake level. The cabins have sinks which drain to the surface. Neither the outhouses nor sinks meet Minnesota Pollution Control Agency (MPCA) and City of Orono standards for waste disposal. The proposed cabin at 620 Big Island has two bedrooms, a bathroom and a kitchen sink requiring the use of an on-site sewage treatment system, however soil testing indicates that a 1' separation from the seasonally high water table is not achievable on this lot. The adjacent property, 610 Big Island, has been acquired by the applicant to provide a suitable area for on-site sewage treatment for both properties. The cabin at 610 Big Island is in poor condition and will be replaced with a ^bedroom cabin as well. Soil testing and system design has been approved for a Type 2. 2-bedroom home for each cabin (225 gal/day/cabin). The system meets MPCA and most City ordinances. A variance will be required for a 10* setback from the mound site to the east and west property lines of 610 Big Island. A 10* setback variance will also be required between the septic tanks and the lot line between 610 and 620 Big Island. The proposed soil treatment area is suitable for a mound and lies entirely within the redefined lot lines of 610 Big Island property. The proposed tanks lie within redefined lot lines of 620 Big Island. Therefore, easements will be required on each property for the shared use and maintenance of the septic system. Due to the site slope and water table conditions, the proposed sewage treatment site is the only area available for these two properties. Although no alternate site is available, the proposed septic system will provide a means of sewage treatment for both properties which will meet the new DNR Shoreland Regulations. As the use of these cabins will be on a seasonal basis and would not likely be used to capacity for extended periods of time, an alternate site may not be necessary. Staff will approve the required septic variances provided the easements for the use of the on-site sewage treatment system can be provided. A condition limiting the number of bedrooms to two on both properties should be included since no area is available to expand the drainfield area. Isv ! ) i-/ .1 -'jiilr I • iT-i