Minnesota Rules Chapters 7080 through 7083 Subsurface Sewage Treatment Systems Program Extracted from Minnesota Rules 2014 including revisions adopted through January 2014 Text prepared by the University of Minnesota and is not the official version compiled by the Office of the Revisor of Statutes The official rule language for Minn. Rules chs. 7080, 7081, 7082 and 7083 can be found at the Revisor’s website at http://www.revisor.leg.state.mn.us/ Chapters 7080, 7081, 7082 and 7083 Table of Contents Chapter 7080 Minnesota Pollution Control Agency Design Standards for Individual Subsurface Sewage Treatment Systems 7080.1050 Purpose and Intent ........................................................ 1 7080.1100 Definitions ...................................................................... 2 7080.1200 Administration of Design Standards ........................ 12 7080.1500 Compliance Criteria .................................................... 13 7080.1550 Acceptable and Prohibited Discharges .................... 15 7080.1670 Requirements to Conduct Work ................................ 16 7080.1700 Design Phase I; Site Evaluation ................................. 16 7080.1710 Preliminary Evaluation .............................................. 16 7080.1720 Field Evaluation ........................................................... 17 7080.1730 Phase I; Site Evaluation Reporting............................ 22 7080.1750 Design Phase II ............................................................ 23 7080.1850 Sewage Flow Determination for Dwellings ............. 23 7080.1860 Design Flow (Gallons Per Day) ................................. 23 7080.1880 Sewage Flow Determination for Other Establishments ................................................. 24 7080.1885 Other Flow Considerations ........................................ 24 7080.1900 Sewage Tanks, General ............................................... 24 7080.1910 Tank Strength ............................................................... 25 7080.1920 Septic Tank Design ...................................................... 25 7080.1930 Septic Tank Capacity ................................................... 26 7080.1940 Multiple Septic Tanks ................................................. 27 7080.1950 Compartmentalization of Single Tanks .................... 28 7080.1960 Septic Tank Baffles ....................................................... 28 7080.1970 Sewage Tank Access .................................................... 29 7080.1980 Tank Construction ....................................................... 30 7080.1990 Tank Storage, Transport, and Use ............................. 30 7080.2000 Location and Installation of Tanks............................ 31 7080.2010 Tank Assessment ......................................................... 32 7080.2020 Tank Identification ...................................................... 33 7080.2030 Effective Date ............................................................... 34 7080.2050 Distribution of Effluent .............................................. 34 7080.2100 Dosing of Effluent ....................................................... 39 7080.2150 Final Treatment and Dispersal .................................. 40 7080.2200 Type I Systems ............................................................. 47 7080.2210 Trenches and Seepage Beds ....................................... 47 7080.2220 Mounds ......................................................................... 49 i 7080.2230 At-Grade Systems ........................................................ 52 7080.2240 Graywater Systems ..................................................... 54 7080.2250 Type II Systems ............................................................ 54 7080.2270 Floodplain Areas ......................................................... 55 7080.2280 Privies ........................................................................... 56 7080.2290 Holding Tanks ............................................................. 57 7080.2300 Type III Systems........................................................... 57 7080.2350 Type IV Systems .......................................................... 58 7080.2400 Type V Systems ............................................................ 59 7080.2430 Reporting ...................................................................... 60 7080.2440 Collection Systems ...................................................... 60 7080.2450 Maintenance ................................................................. 60 7080.2500 System Abandonment ................................................ 63 7080.2550 Seepage Pits, Drywells, and Leaching Pits .............. 64 Chapter 7081 Pollution Control Agency Midsized Subsurface Sewage Treatment Systems 7081.0010 Purpose and Intent ...................................................... 66 7081.0020 Definitions .................................................................... 67 7081.0040 State Regulation ........................................................... 68 7081.0050 Federal Regulation ...................................................... 69 7081.0060 Local Regulation .......................................................... 69 7081.0070 Variance Procedures ................................................... 70 7081.0080 Performance and Compliance Criteria ..................... 70 7081.0100 Professional Requirements ........................................ 72 7081.0110 Sewage Flow Determination ...................................... 72 7081.0120 Design Flow Determination for Dwellings ............. 72 7081.0130 Flow and Waste Concentration Determination for Other Establishments ........................................... 73 7081.0140 Infiltration .................................................................... 78 7081.0150 Necessity of Soil and Site Evaluation ....................... 78 7081.0160 Preliminary Evaluation .............................................. 78 7081.0170 Field Evaluation ........................................................... 79 7081.0180 Soil Interpretation for System Design ...................... 81 7081.0190 Site Protection .............................................................. 82 7081.0200 Soil and Site Report ..................................................... 82 7081.0210 Groundwater Investigation ........................................ 83 7081.0230 Design Standards ........................................................ 85 7081.0240 Sewage Tanks ............................................................... 85 7081.0250 Distribution of Effluent .............................................. 86 7081.0260 Dosing of Effluent ....................................................... 86 7081.0270 Final Treatment and Dispersal .................................. 86 7081.0275 Collection Systems ...................................................... 89 ii 7081.0280 Construction Requirements ....................................... 89 7081.0290 Operation and Maintenance ...................................... 90 7081.0300 System Abandonment ................................................ 90 Chapter 7082 Pollution Control Agency Requirements for Localists Programs 7082.0010 Purpose and Intent ...................................................... 91 7082.0020 Definitions .................................................................... 91 7082.0040 Regulatory Administration Responsibility .............. 91 7082.0050 General Requirements for Local Ordinances .......... 94 7082.0100 Requirements for Local Ordinances ......................... 97 7082.0300 Local Program Administration ............................... 101 7082.0500 Permit Program for SSTS .......................................... 103 7082.0600 System Management ................................................. 104 7082.0700 Inspection Program for Subsurface Sewage Treatment Systems .................................................... 105 Chapter 7083 Subsurface Sewage Treatment Systems Licensing and Certification Program, Product Registration Program, and Advisory Committee 7083.0010 Purpose and Intent .................................................... 112 7083.0020 Definitions .................................................................. 112 7083.0040 Administration by Agency ....................................... 114 7083.0700 Licenses ....................................................................... 115 7083.0710 Categories, Authorizations, and Responsibilities .......................................................... 116 7083.0720 Requirements for SSTS Licensed Businesses ......... 116 7083.0730 Requirements for Certified Individuals ................. 117 7083.0740 Design License ........................................................... 117 7083.0750 Inspection License ..................................................... 118 7083.0760 Installation License ................................................... 119 7083.0770 Maintenance License ................................................ 120 7083.0780 Service Provider License .......................................... 121 7083.0790 Other Work ................................................................. 122 7083.0800 Restricted Licenses .................................................... 122 7083.0900 Application for Licenses; Fees; Renewal ................ 122 7083.1000 Bonding and Insurance for SSTS Licensed Business; Liability ....................................