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Orono, MN Code of Ordinances Pagel of 3 <br /> Sec.58-50.-More restrictive design and construction standards. <br /> All ISTS permit applications,site evaluations,design specifications,construction methods,and material specifications <br /> shall meet the parts of Minnesota Rules chapter 7080 adopted by reference in section 58-43 with the following additional <br /> minimum standards: <br /> (1) Site evaluation.The site evaluation report shall include the following: <br /> a. Soil borings.At least three soil borings shall be completed for each new drainfield site designed.Each soil boring <br /> must be located within the drainfield site or within close proximity along similar contours such that similar soil <br /> conditions are likely.For additions to an ISTS,at least one soil boring shall be made in the expansion area. <br /> b. Percolation tests.At least two percolation tests shall be completed for each new drainfield site designed. Each <br /> percolation test must be located within the drainfield site or within close proximity along similar contours such <br /> that similar soil conditions are likely. For additions to existing ISTS's,at least one percolation test shall be <br /> completed in the expansion area. <br /> c. Plot plan.A scale drawing of the entire lot showing the following: <br /> 1. All property lines and lot dimensions. <br /> 2. All existing and proposed structures. <br /> 3. All existing or proposed well locations,or water supply piping. <br /> 4. Relative elevations of house,lot corners and drainfield areas. <br /> 5. Slope of ground at drainfield sites by contour lines or direction arrows and slope percentages. <br /> 6. Location of all percolation test holes and soil borings with identifying symbols and relative ground <br /> elevations of each. <br /> 7. Primary and alternate drainfield areas identified. <br /> 8. Distance from primary and alternate drainfield areas to property lines,well locations,and any lake,stream, <br /> marsh or drainage channel within 75 feet of any part of the system. <br /> (2) ISTS design. ISTS design specifications shall include proposed flows or other sizing information,minimum sewage <br /> tank capacity,minimum soil treatment area requirements,a plan of the component layout,and all other <br /> information necessary to assure the city that the ISTS is designed and will be constructed to receive,treat and <br /> dispose of all of the sewage from the building served.Footing or roof drainage,water softener recharge water, <br /> garage floor drainage,toxic chemicals,flammable liquids,animal wastes,commercial process water and <br /> commercial kitchen grease shall not enter any portion of the ISTS but shall be separately treated and disposed of <br /> according to the applicable regulations of the MPGA,the state board of health and the city. <br /> a. Setbacks.The minimum setback distance requirements are as follows: <br /> Feature Sewage Soil <br /> Tank Treatment <br /> (feet) Area <br /> Water supply <br /> well: <br /> IDeep well 50 50 <br /> Shallow 50 100 <br /> well <br /> Wetland SQ 50 <br /> Lake: <br /> General 75 75 <br /> development <br /> 75 75 <br /> Recreational <br /> development <br /> about:blank 7/30/2015 <br /> about:blank 7/30/2015 <br /> 7/30/2015 <br />