NR 214.17(5)(b)(b) The department may require in a WPDES permit that the discharge to the system be monitored for BOD5, total suspended solids, forms of nitrogen, chloride, metals or any other pollutant that may be present. The department shall select the pollutants to be monitored and the required frequency of monitoring on a case-by-case basis by considering the potential public health impacts, probable environmental impact, soil and geologic conditions, past operating performance, concentrations and characteristics of pollutants in the discharge and other relevant information.

NR 214.17(5)(c)(c) The department may require electronic or paper submittal of discharge monitoring reports and land application forms.

NR 214.17(6)(a)(a) Vehicles used for transporting or landspreading the waste shall be maintained to prevent spillage or leakage.

NR 214.17(6)(b)(b) The landspreading vehicle shall be moving forward at all times of application unless it is equipped with a high pressure spray nozzle which evenly distributes the waste over the land.

NR 214.17(6)(c)(c) Management plan. The department shall require each landspreading system owner or operator to submit a management plan for optimizing system performance and demonstrating compliance with the requirements of this chapter. Following approval by the department, the treatment system shall be operated in conformance with the management plan. If the facility wishes to operate differently than specified in the approved plan, a written request shall be submitted to the department for approval to amend the management plan. The plan shall specify information on pretreatment processes, site identification on plat and soil maps, aerial photographs, if available, description of all site limitations, vegetative cover management and removal, availability of storage, type of transporting and spreading vehicle, load and rest schedules, monitoring procedures, contingency plans for periods of adverse weather or odor or nuisance abatement and any other pertinent information.

NR 214.18(1)(1) Applicability. Only sludges which have been exempted from regulation under ch. NR 518 and have been shown to have beneficial properties as a soil conditioner or fertilizer and not have detrimental effects on the soil, crops or groundwater may be spread on the land. A WPDES permit is required for the spreading of sludge on land.

NR 214.18(2)(a)(a) All sites shall be approved by the department prior to sludge being spread.

NR 214.18(2)(b)(b) Sludge may not be spread within 500 feet of any residence, except that this distance may be reduced to 200 feet if the sludge is incorporated with the soil and any affected owners and occupants give their written consent for the reduced separation distance.

NR 214.18(2)(c)(c) Sludge may not be spread within 1000 feet of a well serving a community public water supply system or within 250 feet of any other potable water supply well.

NR 214.18(2)(d)(d) Sludge may not be surface spread within 200 feet from any surface water course, dry run or wetlands, except that if a vegetative buffer strip is maintained between the site and the surface water, the department may approve a reduced separation distance to 100 feet. If the sludge is incorporated in the soil, the separation distance from any surface water may be reduced to a minimum of 50 feet.

NR 214.18(2)(e)(e) Sludge may not be spread on wetlands or on areas subject to flooding or ponding.

NR 214.18(2)(f)(f) Sludge spreading sites shall be limited to a slope of 12% or less when the soil temperatures are above freezing. When the ground is frozen or snow covered, the landspreading shall be restricted to sites with slopes of 2% or less. Sites with slopes of 2-6% may be approved for winter time spreading on a case-by-case basis.

NR 214.18(2)(g)(g) Sludge spreading sites shall have at least 36 inches of separation between the ground surface and bedrock or groundwater. However, the department may allow a reduced separation distance to a minimum of 18 inches on a case-by-case basis provided the rate of application is reduced.

NR 214.18(3)(a)(a) Vehicles used for spreading shall be equipped with a distribution system capable of spreading the sludge evenly over the site.

NR 214.18(3)(b)(b) Any system used for the storage or stacking of sludge prior to spreading shall be designed and constructed in accordance with ch. NR 213, or other design criteria as approved in the sludge management plan. Plans and specifications shall be submitted to the department for approval of such storage or stacking systems.

NR 214.18(3)(c)(c) Storage or stacking systems shall be sited and operated to minimize odors or other public nuisance conditions.

NR 214.18(4)(a)(a) The discharge to a sludge spreading site may not exceed the hydraulic, organic, nitrogen, chloride or other limitations specified in a WPDES permit or plans developed pursuant to a permit requirement. In determining discharge limitations, the department shall consider past operating performance, the ability of the soils to treat the pollutants in the discharge, nutrient uptake of the cover crops, hydrogeologic characteristics of the site such as permeability and infiltration rates, and other relevant information.

NR 214.18(4)(b)(b) The sludge application rate shall be limited so that any parameter that may impact groundwater quality is restricted to minimize the concentration of the substance in the groundwater to the extent technically and economically feasible and to prevent exceedence of the preventive action limit in the groundwater.

NR 214.18(4)(c)(c) In order to prevent surface runoff and leaching and to control objectionable odors, the department may require liquid sludge to be incorporated into the soil surface within a time period specified in the WPDES permit. Cake sludge shall be incorporated in the soil in accordance with the time period specified in the sludge spreading management plan.