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7 MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS 7081.0130 <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 32 SR 1400 <br />Published Electronically: March 11, 2011 <br />7081.0110 SEWAGE FLOW DETERMINATION. <br />The design flow is the combined values determined in parts 7081.0120, 7081.0130, and 7081.0140. <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 32 SR 1400 <br />Published Electronically: March 11, 2011 <br />7081.0120 DESIGN FLOW DETERMINATION FOR DWELLINGS. <br />Subpart 1. Sum of design flow for existing dwellings. The design flow for MSTS serving existing <br />dwellings is determined by the following calculation in conjunction with part 7080.1850: <br />the total flow from the ten highest flow dwellings + (total flow from the remaining dwellings * 0.45) <br />Subp. 2. New housing developments. For new housing developments to be served by a common <br />SSTS, the developer must determine and restrict the total number of bedrooms for the development. <br />Proposed dwellings are determined to be Classification I dwellings for flow determination purposes unless <br />different classifications are approved by the local unit of government. The determined classification system <br />must be used in conjunction with the flow calculation method in subpart 1. If the ultimate development <br />of phased or segmented growth meets or exceeds the thresholds in part 7081.0040, subpart 1, item B, the <br />initial system or systems and all subsequent systems require a state disposal system permit. <br />Subp. 3. Additional capacity. If construction of additional dwellings or bedrooms, installation <br />of additional water -using devices, or other factors likely to increase the flow volumes can be reasonably <br />anticipated, the MSTS must be designed to accommodate the additional capacity as determined by the local <br />unit of government. <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 32 SR 1400; 35 SR 1353 <br />Published Electronically: March 11, 2011 <br />7081.0130 FLOW AND WASTE CONCENTRATION DETERMINATION FOR OTHER <br />ESTABLISHMENTS. <br />B. <br />Subpart 1. Method. Design flows for other establishments are determined by methods in item A or <br />A. The design flow of sewage for MSTS serving other establishments is estimated using Table <br />I. <br />TABLE I <br />ESTIMATED DESIGN SEWAGE FLOW FROM OTHER ESTABLISHMENTS <br />Copyright ©2014 by the Rev <br />so <br />of Statutes, State of Minnesota. All Rights Reserved. <br />