NR 113.03(7)(7) “Bedrock” means the rock that is exposed at the earth’s surface or underlies soil material and includes any of the following: NR 113.03(7)(a)(a) Weathered in-place consolidated material, larger than 2 mm in size and greater than 50 percent by volume. NR 113.03(7)(b)(b) Weakly consolidated sandstone at the point of increased resistance to penetration of a knife blade. NR 113.03(8)(8) “Business” means any individual, partnership, corporation, or body politic that does servicing. NR 113.03(8m)(8m) “Centralized septage treatment facility” means a treatment facility that accepts septage from multiple sources and treats the septage prior to discharge or disposal. NR 113.03 NoteNote: Centralized septage treatment facilities are regulated under ch. NR 204. NR 113.03(9)(9) “Certified operator” means any person servicing private sewage systems such as septic and holding tanks, dosing chambers, grease interceptors, seepage beds, seepage pits, seepage trenches, distribution cells, privies, or portable restrooms who holds a valid Wisconsin septage servicing operator’s certification under ch. NR 114. NR 113.03(10)(10) “Community well” means a public well which serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. Any public well serving 7 or more homes, 10 or more mobile homes, 10 or more apartment units, or 10 or more condominium units shall be considered a community well unless information is available to indicate that 25 year-round residents will not be served. NR 113.03(12)(12) “Department” means the department of natural resources. NR 113.03(13)(13) “Disposal” means the controlled discharge of septage to a POTW, treatment or storage lagoon, or to an agricultural field for the purpose of recycling nutrients back into the environment. NR 113.03(13m)(13m) “Distribution cell” means a dimensional zone that is part of a POWTS treatment or dispersal component where wastewater is disseminated into in situ soil or engineered soil. NR 113.03(14)(14) “Dormant field” means a field that is not currently used or will not be used within 12 months after septage has been applied to the field for the harvesting of a crop. A field may have a vegetative cover crop grown on it, and a need for increased organic matter. NR 113.03(15)(15) “Dosing chamber” or “pumping chamber” means a water tight receptacle that employs a pump or automatic siphon to elevate or distribute effluent to the private sewage system. NR 113.03(16)(16) “Dry run” means a drainage pathway, either natural or artificial, with definable banks, which contains a confined flow during periods of runoff. NR 113.03(16m)(16m) “DSPS” means the department of safety and professional services. NR 113.03(17)(17) “Farmer” means a person who owns or leases a contiguous parcel of land of 40 acres or more that the person is using for agricultural purposes. NR 113.03(20)(20) “Food crops” means tobacco and crops grown for human consumption. NR 113.03(21)(21) “Grease interceptor” means a water tight receptacle designed to intercept and retain grease or fatty substances contained in kitchen and other food wastes. Grease interceptor and grease trap mean the same thing. NR 113.03(22)(22) “Groundwater” means any of the waters of the state, as defined in s. 299.01 (5), Stats., occurring in a saturated subsurface geological formation of permeable rock or soil. NR 113.03(23)(23) “High groundwater level” means the higher of either the elevation to which the soil is saturated as observed as a free water surface in an unlined hole, or the elevation to which the soil has been seasonally or periodically saturated as indicated by soil color patterns throughout the soil profile. NR 113.03(24)(24) “High use field” means a field that is approved by the department to receive more than 39,000 gallons per acre of septage per crop year and the volume applied is limited to the crop nutrient requirements. NR 113.03(26)(26) “Holding tank” means an approved watertight receptacle for the collection and holding of sewage. NR 113.03(26m)(26m) “Holding tank POWTS” means a holding tank component of a POWTS used for the collection and holding of sewage. NR 113.03(27)(27) “Hydraulic loading rate” means the volume of waste discharged per unit area per unit time. NR 113.03(28)(28) “Incorporation” means the mixing of septage with topsoil, by methods such as discing, mold-board plowing, chisel plowing or rototilling to a minimum depth of 4 inches. NR 113.03(30)(30) “Injection” means the subsurface placement of septage to a depth of 4 to 12 inches.