Minnesota Administrative Rules
Agency 167 - Pollution Control Agency
Chapter 7081 - MIDSIZED SUBSURFACE SEWAGE TREATMENT SYSTEMS
Part 7081.0020 - DEFINITIONS

Subpart 1. Certain terms.

In addition to the definitions in chapters 7080, 7082, and 7083 and Minnesota Statutes, section 115.55, which are incorporated by reference, the terms used in this chapter have the meanings given them. For the purposes of this chapter, if a term used in this chapter is defined in chapter 7080, 7082, or 7083, it shall apply to MSTS and other SSTS if referenced in later chapters. Certain terms or words used in this chapter must be interpreted as follows: the words "shall" and "must" are mandatory and the words "should" and "may" are permissive. All distances specified in this chapter are horizontal distances unless otherwise specified.

Subp. 2. [Repealed, 38 SR 1001]

Subp. 3. Groundwater mound.

"Groundwater mound" means the rise in height of the periodically saturated soil or regional water table caused by the addition of sewage effluent from a subsurface sewage treatment system into the soil.

Subp. 4. Midsized subsurface sewage treatment system or MSTS.

"Midsized subsurface sewage treatment system" or "MSTS" means a subsurface sewage treatment system, or part thereof, as set forth in Minnesota Statutes, sections 115.03 and 115.55, that employs sewage tanks or other treatment devices with final discharge into the soil below the natural soil elevation or elevated final grade and that is designed to receive sewage design flow of greater than 5,000 gallons per day to 10,000 gallons per day.

MSTS also includes sewage collection systems and associated tanks that discharge into MSTS treatment or dispersal components. MSTS does not include those components defined as plumbing under the Minnesota Plumbing Code, chapter 4714, except for a building sewer connected to a subsurface sewage treatment system.

Subp. 5. NPDES permit.

"NPDES permit" means a national pollutant discharge elimination system permit issued by the agency.

Subp. 6. Other establishment.

"Other establishment" means any public or private structure other than a dwelling that generates sewage that discharges to an SSTS.

Subp. 7. SDS permit.

"SDS permit" means a state disposal system permit issued by the agency.

Subp. 7a. SSTS with low impact to potable water.

"SSTS with low impact to potable water" means an SSTS that is designated by an individual licensed by the Board of Architecture, Engineering, Land Surveying, Landscape Architecture, Geoscience, and Interior Design who has determined that the groundwater plume from a soil dispersal component:

Subp. 8. Well capture zone.

"Well capture zone" means the surface and subsurface area that supplies water to a water supply well.