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\ <br />Subp. 3. Sewage Treatr.ient. <br />The changes in the introductory paragraph and Items A and B <br />are needed to update the language and to eliminate <br />inappropriate or redundant phrasing. Generally, the notion <br />that sewage is to be "treated” as opposed to "disposed" is <br />conveyed with the new language. In Item A, "publicly-owned <br />sewer systems" is a better way of describing the types of <br />systems that should be utilized in Sloreland areas when they <br />are available. <br />In Item B, the changes made are needed to reflect more <br />appropriate and current terminology, and to specifically <br />refer the rule user to the comprehensive state rule (Minn. <br />Rule 7080) that is incorporated into the shoreland rules for <br />on-site sewage treatment. <br />In Items C, D, E, F and G, it is reasonable to delete from <br />the rule the stated standards, criteria and factors for <br />location and installation of sewage treatment systems, since <br />all of these items are addressed in a consistent and <br />comprehensive fashion in the relevant rules (Minn. Ru es <br />7080) that are referenced in Item B, above. <br />Further, the numerical sewage <br />the OHW of lakes are deleted <br />and subsequently re-arranged <br />the setback values for lakes <br />their new tabular arrangement <br />not changed from the original <br />for sewage treatment systems <br />from consideration of several <br />developmer. and protection. <br />system setback standards from <br />as they appeared in text format <br />in tabular form. In Item C, <br />are underlined only because of <br />, as the values themselves are <br />set of rules. The setbacks <br />for river classes are derived <br />aspects of shoreland <br />First, the system location is related to and dependent on <br />the location of the principal structure. Ordinarily, <br />along rivers at the area of the principal structure setback <br />is either flat or sloping toward the river at varying rate . <br />For sloping building sites, placement of the sewage <br />treatment system can use this natural slope for gravity f <br />of sewage effluent from the principal structure to the <br />septic tank and finally to the drainfield. Additionally, <br />the flow of groundwater is usually oriented towards the <br />river. This can enable dilution of the nitrate component of <br />the effluent in a manner that will not pose a health threa <br />to the well water supply of the principal structure, since <br />most residences would be designed with the well a or <br />the principal structure and upslope of the groundwater f <br />from the drainfield. For this reason it is reasonable to