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17 INDIVIDUAL SUBSURFACE SEWAGE TREATMENT SYSTEMS 7080.1100 Subp. 53. Ordinary high water level. "Ordinary high water level" of surface water has the meaning given in Minnesota Statutes, section 103G.005, subdivision 14. Subp. 54. Original soil. "Original soil" means naturally occurring soil that has not been cut, filled, moved, smeared, compacted, altered, or manipulated to the degree that the loading rate must be reduced from that associated with natural soil conditions. Subp. 55. Other pit. "Other pit" means any pit or other device designed to leach sewage effluent that is greater than 30 inches in height or has a bottom area loading rate of sewage greater than two gallons per square feet per day. Subp. 56. Owner. "Owner" means any person having possession of, control over, or title to property with an ISTS. Subp. 57. Parent material. "Parent material" means the unconsolidated and chemically weathered geologic mineral or organic matter from which soils are developed by soil forming processes. Subp. 58. Percolation rate. "Percolation rate" means the rate of a drop of water infiltrating into a test hole as specified in part 7080.1720, subpart 6, item B. Subp. 59. Periodically saturated soil. "Periodically saturated soil" means the highest elevation in the soil that is in a reduced chemical state due to soil pores filled or nearly filled with water causing anaerobic conditions. Periodically saturated soil is determined by the presence of redoximorphic features in conjunction with other established indicators as specified in part 7080.1720, subpart 5, items E and F, or determined by other scientifically established technical methods or empirical field measurements acceptable to the permitting authority in consultation with the commissioner. Subp. 60. Plastic limit. "Plastic limit" means a soil moisture content above which manipulation will cause compaction or smearing. The plastic limit can be measured by American Society for Testing and Materials, Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM D4318 (2005). The standard is incorporated by reference, is available through the Minitex interlibrary loan system, and is not subject to frequent change. Subp. 61. Pressure distribution. "Pressure distribution" means a network of distribution pipes in which effluent is forced through orifices under pressure. Subp. 62. Privy. "Privy" means an aboveground structure with an underground cavity meeting the requirements of part 7080.2280 that is used for the storage or treatment and dispersal of toilet wastes, excluding water for flushing and gray water. A privy also means a nondwelling structure containing a toilet waste treatment device. Subp. 63. Public waters. "Public waters" means any public waters or wetlands defined in Minnesota Statutes, section 103G.005, subdivision 15, or identified as public waters or wetlands by the inventory prepared according to Minnesota Statutes, section 103G.201. Subp. 64. Pump tank. "Pump tank" means a sewage tank or separate compartment within a sewage tank, which receives sewage tank effluent, that serves as a reservoir for a pump. A separate tank used as a pump tank is considered a septic system tank under Minnesota Statutes, section 115.55, subdivision 1, paragraph (p). Subp. 65. Redoximorphic features. "Redoximorphic features" means: Copyright ©2014 by the Rev so of Statutes, State of Minnesota. All Rights Reserved.