NR 214.03(26)(26) “Landspreading system” means a system where a controlled quantity of liquid waste or by-product solid is uniformly applied onto, or incorporated into, the soil surface of designated sites by means of a vehicle with a spreader bar, spray gun or subsurface injector. The wastes are to be applied for the benefit of the vegetative cover. Landspreading systems also include those systems where liquid wastes are occasionally applied through temporary irrigation piping at a frequency similar to that of application by vehicles.

NR 214.03(27)(27) “Liquid waste” means process wastewater and waste liquid products, including silage leachate, whey, whey permeate, whey filtrate, contact cooling water, cooling or boiler water containing water treatment additives, and wash water generated in industrial, commercial and agricultural operations which result in a point source discharge to a land treatment system.

NR 214.03(28)(28) “Load/rest cycle” means a schedule of operation in which a certain volume of waste is loaded on a portion of the treatment system and then that portion is rested to allow the soil to reaerate and the soil micro-organisms to break down the waste material.

NR 214.03(29)(29) “Nested well system” means a group of 2 or more wells installed within 10 feet of each other at the ground surface and constructed to varying depths.

NR 214.03(30)(30) “Overland flow system” means a land treatment system in which the applied wastewater flows uniformly down grassy sloped terrain having very low permeability soils and is collected at the bottom of the slope for subsequent discharge.

NR 214.03(31)(31) “Permeability” means the rate of liquid movement through a porous medium.

NR 214.03(32)(32) “Potable water supply well” means a well supplying water for human consumption, sanitary use or food product preparation.

NR 214.03(33)(33) “Preventive action limit” or “PAL” means a numerical value expressing the concentration of a substance in groundwater which is adopted under s. 160.15, Stats., and s. NR 140.10, 140.12 or 140.20.

NR 214.03(34)(34) “Sludge” means the accumulated solids generated during the biological, physical or chemical treatment, coagulation or sedimentation of water or wastewater.

NR 214.03(35)(35) “Soil” means the unconsolidated material that overlies bedrock and has been physically and chemically derived from organic material or bedrock by nature.

NR 214.03(36)(36) “Soil moisture holding capacity” means the volume of water available for plant growth in a unit depth of soil. It is measured by the difference in water volume retained in a unit depth of soil between the pore pressures of field capacity (1/10 to P atmospheres) and the wilting point (15 atmospheres).

NR 214.03(37)(37) “Unsaturated zone” means the zone between the land surface and the water table in which the pore spaces contain water at less than atmospheric pressure, as well as air and other gases.

NR 214.03(38)(38) “Wetland” as defined in s. 23.32 (1), Stats., means an area where water is at, near or above the land surface long enough to be capable of supporting aquatic or hydrophytic vegetation and which has soils indicative of wet conditions.

NR 214.03 HistoryHistory: Cr. Register, June, 1990, No. 414, eff. 7-1-90; corrections in (2), (9), (16) and (18) made under s. 13.92 (4) (b) 6. and 7., Stats., Register July 2010 No. 655; correction in (16) made under s. 13.92 (4) (b) 7., Stats., Register July 2021 No. 787.

NR 214.04(1)(1) The discharge of toxic or hazardous substances to land treatment systems shall be prohibited unless the owner or operator demonstrates to the department that the discharge of such pollutants will be in such small quantities that no environmental pollution will result and standards established in ch. NR 140 will not be exceeded. The demonstration criteria used shall include, but not be limited to: the toxicity of the pollutant or waste, degradability, the usual or potential presence of the pollutant or waste in the existing environment, site characteristics and other relevant factors. This prohibition applies to sludges which are classified as toxic or hazardous wastes.

NR 214.04(2)(2) The discharge of hazardous wastes to land treatment systems is prohibited as specified in s. NR 664.0270.

NR 214.04(3)(3) The underground injection of any pollutant through a well is prohibited as specified in s. NR 812.20.

NR 214.04(4)(4) Liquid wastes, sludges or by-product solids that contain viable pathogens, such as those from meat or poultry processing, may not be applied on fields used for growing crops that may be consumed raw by humans.

NR 214.04 HistoryHistory: Cr. Register, June, 1990, No. 414, eff. 7-1-90; correction in (2) made under s. 13.92 (4) (b) 7., Stats., Register July 2010 No. 655.

NR 214.05NR 214.05 Additional limitations. Discharges of industrial liquid wastes, by-product solids and sludges to land treatment systems shall be operated to prevent detrimental effects on surface waters, wetlands and critical habitat areas. The department may impose additional limitations on land treatment systems as follows:

NR 214.05(1)(1) The requirements of this chapter may be supplemented or superseded by standards or prohibitions for toxic or hazardous substances;

NR 214.05(2)(2) The requirements of this chapter may be supplemented or superseded by more stringent requirements, including pretreatment requirements, more stringent discharge limitations, and more frequent or stringent effluent or groundwater monitoring requirements, if:

NR 214.05(2)(a)(a) There is an increased possibility of surface water or groundwater contamination, due to system location, loading rates, soil types, geologic or other conditions;

NR 214.05(2)(b)(b) The wastewaters contain any substance or concentration of substances not normally associated with the type of discharge identified in s. NR 214.02 (1); or