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19 MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS 7081.0270 <br />C. The pump discharge capacity must be based on the perforation's discharge, with a minimum <br />average head of two feet for 1/4 inch and 3/16 inch perforations and five feet for 1/8 inch perforations. <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 32 SR 1400 <br />Published Electronically: March 11, 2011 <br />7081.0270 FINAL TREATMENT AND DISPERSAL. <br />Subpart 1. General. Final treatment and dispersal must be according to applicable design <br />requirements in chapter 7080, except as modified in this part. Code of Federal Regulations, title 40, parts <br />144 and 146, prescribe additional design regulations applicable to certain systems designed under this <br />chapter. At a minimum, flow amounts to be used for the purposes of this part must be derived from part <br />7081.0110. <br />Subp. 2. Setbacks. MSTS components must meet the setbacks in Table II. <br />Feature <br />Table II <br />Minimum Setback Distances (feet) <br />Sewage Tank, Absorption Area Building Sewer <br />Holding Tank, or Sealed or Sewage <br />or Sealed Privy Privy Supply Pipes <br />Water supply wells <br />Buried water lines <br />Buildings** 10 20 <br />System site boundaries 10 10 <br />The ordinary high water level of public <br />waters <br />* <br />* <br />*Setbacks from buried water pipes and water supply wells are governed by chapters 4715 and 4725, <br />respectively. <br />**If setbacks are reduced through local administrative processes, the system shall not be located under or <br />within the structure. <br />***Setbacks from lakes, rivers, and streams are governed by chapters 6105 and 6120. <br />Subp. 3. Minimal soil and site conditions. The site proposed to support the soil treatment and <br />dispersal system must: <br />A. have the upper 12 inches of the absorption area: <br />(1) be original soil; <br />Copyright ©2014 by the Rev <br />so <br />of Statutes, State of Minnesota. All Rights Reserved. <br />