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30 Revised 10/03/2019 Ordinance Language Commentary must be stabilized as soon as possible and appropriate facilities or methods used to retain sediment on the site. C. When development density, topography, soils, and vegetation are not sufficient to adequately handle stormwater runoff, constructed facilities such as settling basins, skimming devices, dikes, waterways, ponds and infiltration may be used. Preference must be given to surface drainage, vegetation, and infiltration rather than buried pipes and man-made materials and facilities. 8.42 Specific Standards: A. Impervious surfaces of lots must not exceed 25 percent of the lot area. B. When constructed facilities are used for stormwater management, documentation must be provided by a qualified individual that they are designed and installed consistent with the field office technical guide of the local soil and water conservation district or the Minnesota Stormwater Manual, as applicable. C. New constructed stormwater outfalls to public waters must be consistent with Minnesota Rules, part 6115.0231. 9.0 SUBDIVISION/PLATTING PROVISIONS 9.1 Purpose. To ensure that new development minimizes impacts to shoreland resources and is safe and functional. 9.2 Land suitability. Each lot created through subdivision, including planned unit developments authorized under Section 10.0 of this ordinance, must be suitable in its natural state for the proposed use with minimal alteration A suitability analysis must be conducted for each proposed subdivision, including planned unit developments, to determine if the subdivision is suitable in its natural state for the proposed use with minimal alteration and whether any feature of the land is likely to be harmful to the health, safety, or welfare of future residents of the proposed subdivision or of the community. 9.3 Consistency with other controls. Subdivisions and each lot in a subdivision shall meet all official controls so that a variance is not needed later to use the lots for their intended purpose. 9.4 Water and Sewer Design Standards. 9.41 A potable water supply and a sewage treatment system consistent with Minnesota Rules, Chapters 7080 – 7081 must be provided for every lot. 9.42 Each lot must include at least two soil treatment and dispersal areas that support systems described in Minnesota Rules, parts 7080.2200 to 7080.223 or site conditions described in part 7081.0270, subparts 3 to 7, as applicable. 9.43 Lots that would require use of holding tanks are prohibited. 8.42.A. Local governments may reduce the maximum amount of impervious surface allowed. Reducing the amount of allowed impervious surface will reduce the runoff volume and rate reducing the risk of erosion and nutrient loading into surface waters. Requiring a lower minimum (15% or 20%) only on new lots avoids the creation of nonconformities.