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19 INDIVIDUAL SUBSURFACE SEWAGE TREATMENT SYSTEMS 7080.1100 Requirements for sewage tanks are described in parts 7080.1900 to 7080.2030. Sewage tanks are considered a septic system tank in Minnesota Statutes, section 115.55, subdivision 1, paragraph (p). Subp. 75. Sewage tank effluent. "Sewage tank effluent" means the liquid that flows from a septic tank or other treatment device. Subp. 76. Site. "Site" means the area required for the proper location of the ISTS. Subp. 77. Slope. "Slope" means the vertical rise or fall divided by the horizontal distance, expressed as a percentage. Subp. 78. Soil dispersal area. "Soil dispersal area" means the area required for the soil dispersal system, including spacing between individual units or zones. Subp. 79. Soil dispersal system. "Soil dispersal system" means a system where sewage effluent is dispersed into the soil for treatment by absorption and filtration and includes, but is not limited to, trenches, seepage beds, at -grade systems, mound systems, and drip dispersal systems. Subp. 80. Soil texture. "Soil texture" means the soil particle size classification and particle size distribution as specified in the Field Book for Describing and Sampling Soils, incorporated by reference in subpart 36. Subp. 80a. Structure. "Structure" means a constructed lot improvement that is intended or used for human occupancy or that is determined by the local unit of government to: A. interfere with the construction, operation, or maintenance of an SSTS; or B. be interfered with by the construction, operation, or maintenance of an SSTS. Subp. 81. Subsoil. "Subsoil" means a soil layer that has a moist color value of 3.5 or greater and has undergone weathering and soil formation processes. Subp. 82. Subsurface sewage treatment system or SSTS. "Subsurface sewage treatment system" or "SSTS" is either an individual subsurface sewage treatment system as defined in subpart 41 or a midsized subsurface sewage treatment system as defined in part 7081.0020, subpart 4, as applicable. Subp. 83. Supply pipe. "Supply pipe" means a nonperforated pipe, the purpose of which is to transport sewage tank effluent. Subp. 84. Systems in shoreland areas or wellhead protection areas or systems serving food, beverage, or lodging establishments or SWF. "Systems in shoreland areas or wellhead protection areas or systems serving food, beverage, or lodging establishments" or "SWF" means the following three categories of systems: A. SSTS constructed in shoreland areas where land adjacent to public waters has been designated and delineated as shoreland by local ordinance as approved by the Department of Natural Resources; B. SSTS constructed in wellhead protection areas regulated under Minnesota Statutes, chapter 103I; and C. SSTS serving food, beverage, and lodging establishments that are required to obtain a license under Minnesota Statutes, section 157.16, subdivision 1, including manufactured home parks and recreational camping areas licensed according to Minnesota Statutes, chapter 327. Subp. 85. Toilet waste. "Toilet waste" means waste commonly disposed of in toilets, including fecal matter, urine, toilet paper, and water used for flushing. Copyright ©2014 by the Rev so of Statutes, State of Minnesota. All Rights Reserved.