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C. Holding tanks. Holding tanks may be used for the following applications only after it can be <br /> shown conclusively by the property owner that a SSTS permitted under this ordinance cannot be <br /> feasibly installed: <br /> 1. As a replacement for an existing failing SSTS; <br /> 2. For an SSTS that poses an Imminent Threat to Public Health and Safety; or <br /> 3. For use with buildings with limited water use. <br /> D. Determination of hydraulic loading rate and SSTS sizing <br /> Table IX from Minn. R. 7080.2150, subp. 3(E) entitled"Loading Rates for Determining Bottom <br /> Absorption Area and Absorption Ratios Using Detailed Soil Descriptions""and <br /> Table IXa from Minn. R. 7080.2150, subp. 3(E)entitled"Loading Rates for Determining Bottom <br /> Absorption Area" Using Percolation Tests"and herein adopted by reference shall both be used to <br /> size SSTS infiltration areas using the larger sizing factor of the two for SSTS design. <br /> Sec.58-73. Maintenance report <br /> Licensed maintenance businesses must abide by the requirements described in Minn. R. <br /> 7083.0770, subp. 2. All written reports required by Minn. R. 7083.0770, subp. 2 must be provided <br /> to the homeowner and the Health Authority within 30 days a8er any maintenance work is <br /> performed. <br /> A. Systems Not Operated Under A Management Plan. Owners of SSTS that are not operated <br /> under a management plan or operating permit must inspect treatment tanks and remove solids if <br /> needed every three years. Solids must be removed when their accumulation meets the limit <br /> described in Minn. R. 7080.2450. <br /> Sec. 58-74.- Special provisions for Lake Minnetonka Islands. <br /> All lots, properties, buildings and structures on Big Island, Mahpiyata Island and Deering Island, <br /> Lake Minnetonka,shall be provided with SSTS's which comply with the requirements of this article, <br /> as amended by the following special provisions and specific exceptions pertaining to island <br /> properties: <br /> (1) Systems not required. Vacant property or property used solely for one-family seasonal <br /> recreational use of land without structures, or with accessory structures only, as permitted <br /> in the RS zoning district, need not be provided with an SSTS, provided that, at any time <br /> such property is actually in use by one or more persons for overnight or longer stays, an <br /> approved marine toilet or portable holding tank toilet shall be available on the property or <br /> within a watercraft docked or moored at the properly. <br /> (2) SSTS required. Each building or structure within the RS zoning district must be connected <br /> to an ISTS according to the provisions of this article as follows: <br /> a. For each principal dwelling. <br /> b. For each dwelling on a property containing two or more dwellings pursuant to a private <br /> guest cabin conditional use permit. <br /> c. For each seasonal dwelling over 800 square feet in floor area. <br /> 13 <br />