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21 MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS 7081.0280 <br />C. The minimum vertical separation can be determined by the method described in part <br />7080.2400 to meet provisions of part 7081.0080, subpart 4, item C, if allowed by the local unit of <br />government. <br />D. An observation well to measure the height of the periodically saturated soil beneath the <br />operating system must be installed and monitored according to the operating permit. <br />Subp. 9. Nitrogen reduction. Systems must employ nitrogen mitigation methods to achieve <br />compliance with part 7081.0080, subpart 4, item D, and must be monitored in accordance with part <br />7081.0210, subpart 4. <br />Subp. 10. Phosphorus reduction. Phosphorus mitigation methods must be employed to achieve <br />compliance with part 7081.0080, subpart 4, item E, if natural processes are found inadequate. <br />Subp. 11. Design report. All information required in this part shall be submitted for review and <br />approval by the local unit of government prior to system construction, including all applicable information <br />delineated on a map. <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 32 SR 1400; 35 SR 1353; 38 SR 1001 <br />Published Electronically: January 22, 2014 <br />7081.0275 COLLECTION SYSTEMS. <br />The collection system for collection of sewage from multiple buildings or multiple other establishments <br />discharging into an MSTS must be designed: <br />A. according to the Prescriptive Designs and Design Guidance for Advanced Designers, <br />incorporated by reference under part 7080.1550, subpart 2; or <br />B. by a Minnesota licensed professional engineer. <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 35 SR 1353 <br />Published Electronically: March 11, 2011 <br />7081.0280 CONSTRUCTION REQUIREMENTS. <br />A. MSTS construction must be according to applicable construction requirements of chapter <br />7080. <br />B. The advanced designer must observe critical periods of system construction. The designer <br />shall prepare a report of observed construction activities and submit the report to the local unit of government <br />prior to final inspection. <br />Statutory Authority: MS s 115.03; 115.55 <br />History: 32 SR 1400; 38 SR 1001 <br />Published Electronically: January 22, 2014 <br />Copyright ©2014 by the Rev <br />so <br />of Statutes, State of Minnesota. All Rights Reserved. <br />