Register April 2018 No. 748
Chapter NR 290
STEAM ELECTRIC POWER GENERATING
Subchapter I - Direct Discharges
NR 290.11 Compliance dates.
NR 290.12 Discharge standards.
Subchapter II - Indirect Discharges
NR 290.21 Compliance dates.
NR 290.22 Discharge standards.
Ch. NR 290 Note
Note: Chapter NR 290 as it existed on October 31, 1986 was repealed and a new chapter NR 290 was created effective November 1, 1986.
NR 290.01
NR 290.01
Purpose. The purpose of this chapter is to establish effluent limitations, standards of performance, and pretreatment standards for discharges from the steam electric power generating category of point sources.
NR 290.01 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 290.02
NR 290.02
Applicability. The effluent limitations, standards of performance, pretreatment standards, and other provisions in this chapter are applicable to pollutants or pollutant properties in discharges resulting from the operation of a generating unit by an establishment primarily engaged in the generation of electricity for distribution and sale which results primarily from a process utilizing fossil-type fuel (coal, gas, or oil) or nuclear fuel in conjunction with a thermal cycle employing the steam/water system as the thermodynamic medium.
NR 290.02 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 290.03
NR 290.03
Definitions. The following definitions are applicable to terms used in this chapter. Definitions of other terms and meanings of abbreviations are set forth in
ss. NR 205.03,
205.04 and
211.03, and the Development Document for Effluent Limitations Guidelines and Standards for the Steam Electric Point Source Category, EPA-440/1-82/029, November 1982, pages 518-545.
NR 290.03 Note
Note: Copies of this document are available for inspection at the office of the department of natural resources, 101 S. Webster, Madison; the secretary of state's office; and the office of the legislative reference bureau, and may be obtained for personal use from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20460.
NR 290.03(1)
(1) “Ash transport water” means water used in the hydraulic transport of either fly or bottom ash.
NR 290.03(2)
(2) “Average concentration” as it relates to chlorine discharge means the average of analyses made over a single period of chlorine release which does not exceed 2 hours.
NR 290.03(3)
(3) “Bottom ash” means the ash that drops out of the furnace gas stream in the furnace and in the economizer sections. Economizer ash is included when it is collected with bottom ash.
NR 290.03(4)
(4) “Chemical metal cleaning waste” means any wastewater resulting from the cleaning of any metal process equipment with chemical compounds, including, but not limited to, boiler tube cleaning.
NR 290.03(5)
(5) “Coal pile runoff” means the rainfall runoff from or through any coal storage pile.
NR 290.03(6)
(6) “Fly ash” means the ash that is carried out of the furnace by the gas stream and collected by mechanical collectors, electrostatic precipitators, fabric filters, or any combination of the 3. Economizer ash is included when it is collected with fly ash.
NR 290.03(7)
(7) “Free available chlorine” or “FAC” means the value obtained using the amperometric titration method for free available chlorine described in “Standard Methods for the Examination of Water and Wastewater”, page 286 (15th edition, 1980).
NR 290.03 Note
Note: Copies of the above document are available for inspection at the office of the department of natural resources, 101 S. Webster, Madison; the secretary of state's office, and the office of the legislative reference bureau, and may be obtained for personal use from the American Public Health Association, Inc., 1015 Fifteenth St. NW, Washington, D.C. 20005.
NR 290.03(8)
(8) “Low volume waste sources” means, taken collectively as if from one source, wastewater from all sources except those for which specific limitations are otherwise established in
s. NR 290.12. Low volume waste sources include wastewaters from wet scrubber air pollution control systems, ion exchange water treatment systems, water treatment evaporator blowdown, laboratory and sampling streams, boiler blowdown, floor drainage, cooling tower basin cleaning wastes and recirculating house service water systems. Sanitary and air conditioning wastes are specifically not included in this definition.
NR 290.03(9)
(9) “Metal cleaning wastes” means any wastewater resulting from the cleaning (with or without chemical cleaning compounds) of any metal process equipment including boiler tube cleaning, boiler fireside cleaning, and air preheater cleaning.
NR 290.03(10)
(10) “New source” for indirect dischargers means any building, structure, facility, or installation from which there is or may be a discharge of pollutants, the construction of which commenced on or after October 14, 1980; or for direct dischargers means any point source the construction of which commenced after November 19, 1982.
NR 290.03(11)
(11) “No detectable amount” means any amount less than or equal to the level of pollutant detectability listed in
40 CFR Part 136.
NR 290.03(12)
(12) “Nonchemical metal cleaning waste” means any wastewater resulting from the cleaning of any metal process equipment without chemical compounds.
NR 290.03(13)
(13) “Once through cooling water” means water passed through the main cooling condensers in one or 2 passes for the purpose of removing waste heat.
NR 290.03(15)
(15) “Recirculated cooling water” means water which is passed through the main condensers for the purpose of removing waste heat, passed through a cooling device for the purpose of removing such heat from the water and then passed again, except for blowdown, through the main condenser.
NR 290.03(16)
(16) “10 year, 24 hour rainfall event” means a rainfall event with a probable recurrence interval of once in 10 years. Probable intensities of 10 year, 24 hour rainfall events are specified in
s. NR 205.05.
NR 290.03(17)
(17) “Total residual chlorine” or “TRC” or “total residual oxidants for intake water with bromides” means the value obtained using the amperometric method for total residual chlorine described in
ch. NR 219.
NR 290.03 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 290.10
NR 290.10
Applicability. The provisions in this subchapter are applicable to discharges of wastewater from the steam electric power generating category of point sources into waters of the state.
NR 290.11
NR 290.11 Compliance dates. Discharge of pollutants from facilities subject to the provisions of this subchapter may not exceed, as appropriate:
NR 290.11(1)
(1) By July 1, 1977, effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT);
NR 290.11(2)
(2) By July 1, 1984, effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT);
NR 290.11(3)
(3) At the commencement of discharge, new source performance standards (NSPS).
NR 290.11 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 290.12(1)
(1)
Best practicable technology. The following effluent limitations and standards for all or specific wastewater flows establish, except as provided in subch.
IV of ch. NR 220, the quantity or quality of pollutants or pollutant properties which may be discharged by a facility subject to the provisions of this chapter after application of the best practicable control technology currently available:
NR 290.12 Note
Note: Despite this reference, federal regulations in
40 CFR 125.30 and state regulations in s.
NR 220.31 (3) state that steam electric power generators are ineligible to receive a fundamentally different factors variance for BPT limitations.
NR 290.12(1)(a)
(a) The pH of all discharges, except once through cooling water, shall be within the range of 6.0 to 9.0. Dischargers which continuously monitor pH shall be subject to
s. NR 205.06.
NR 290.12(1)(b)
(b) There may be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid.
NR 290.12(1)(c)
(c) The quantity of pollutants in each of the wastewater sources identified in Table 1 may not exceed the quantity determined by multiplying the flow by the concentration of each pollutant listed in Table 1.
NR 290.12(1)(d)
(d) Neither free available chlorine nor total residual chlorine may be discharged from any unit for more than 2 hours in any one day and not more than one unit in any plant may discharge free available or total residual chlorine at any one time unless the utility can demonstrate to the department that the units in a particular location cannot operate at or below this level of chlorination.
NR 290.12(1)(e)
(e) In the event that wastestreams from various sources are combined for treatment or discharge, the quantity of each pollutant or pollutant property limited in
pars. (a) to
(d) attributable to each regulated stream except coal pile runoff may not exceed the specified limitation for that waste source.
NR 290.12(1)(f)
(f) Any untreated discharge from facilities designed, constructed, and operated to treat the volume of coal pile runoff which is associated with a 10 year, 24 hour rainfall event may not be subject to the limitations of
par. (c).
NR 290.12(1)(g)
(g) Where the department determines there is no need for a restriction on the mass of pollutants discharged, the quantity of any pollutant allowed to be discharged may be expressed as a concentration limitation instead of the mass limitation required to be calculated by
par. (c). Concentration limitations shall be those concentrations specified in this subsection.
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See PDF for table 
NR 290.12(2)
(2) Best available technology. The following effluent limitations and standards for all or specific wastewater flows establish the quantity or quality of pollutants or pollutant properties which may be discharged by a facility subject to the provisions of this chapter after application of the best available technology economically achievable:
