NR 270.042(2)(a)(a) Except as provided in this subsection, there may not be discharge of process wastewater to navigable waters from mills beneficiating mercury ores by gravity separation methods or by froth flotation methods.
NR 270.042(2)(b)
(b) In the event that the annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility exceeds the annual evaporation, a volume of water equivalent to the difference between annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility and annual evaporation may be discharged subject to the limitations set forth in par.
(a).
NR 270.042 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.043
NR 270.043 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):
NR 270.043(1)
(1) The concentration of pollutants discharged in mine drainage from mines, either open pit or underground, that produce mercury ores may not exceed:
-
See PDF for table 
NR 270.043(2)(a)(a) Except as provided in this subsection, there may not be discharge of process wastewater to navigable waters from mills beneficiating mercury ores by gravity separation methods or by froth-flotation methods.
NR 270.043(2)(b)
(b) In the event that the annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility exceeds the annual evaporation, a volume of water equal to the difference between annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility and annual evaporation may be discharged subject to the limitations set forth in sub.
(1).
NR 270.043 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.044
NR 270.044 New source performance standards (NSPS). Except as provided in ss.
NR 270.0015,
270.002, and
270.003, any new source subject to this subcategory shall achieve the following NSPS representing the degree of effluent reduction attainable by the application of the best available demonstrated technology (BADT):
NR 270.044(1)
(1) The concentration of pollutants discharged in mine drainage from mines either open pit or underground, that produce mercury ores may not exceed:
-
See PDF for table NR 270.044(2)(a)(a) Except as provided in this subsection, there may not be discharge of process wastewater to navigable waters from mills beneficiating mercury ores by gravity separation methods or by froth-flotation methods.
NR 270.044(2)(b)
(b) In the event that the annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility exceeds the annual evaporation, a volume of water equal to the difference between annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility and annual evaporation may be discharged subject to the limitations set forth in sub.
(1).
NR 270.044 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.05
NR 270.05 Applicability; description of the titanium ore subcategory. The provisions of this subcategory are applicable to discharges from:
NR 270.05(1)
(1) Mines obtaining titanium ores from lode deposits,
NR 270.05(2)
(2) Mills beneficiating titanium ores by electrostatic methods, magnetic and physical methods, or flotation methods; and
NR 270.05(3)
(3) Mines engaged in the dredge mining of placer deposits of sands containing rutile, ilmenite, leucoxene, monazite, zircon, and other heavy metals, and the milling techniques employed in conjunction with the dredge mining activity (milling techniques employed include the use of wet gravity methods in conjunction with electrostatic or magnetic methods).
NR 270.05 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.052
NR 270.052 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable after application of the best practicable control technology currently available (BPT):
NR 270.052(1)
(1) The concentration of pollutants discharged in mine drainage from mines obtaining titanium ores from lode deposits may not exceed:
-
See PDF for table NR 270.052(2)
(2) The concentration of pollutants discharged from mills beneficiating titanium ores by electrostatic methods, magnetic and physical methods, or flotation methods may not exceed:
-
See PDF for table NR 270.052(3)
(3) The concentration of pollutants discharged in mine drainage from mines engaged in the dredge mining of placer deposits of sands containing rutile, ilmenite, leucoxene, monazite, zircon, or other heavy metals, and the milling techniques employed in conjunction with the dredge mining activity (milling techniques employed include the use of wet gravity metals in conjunction with electrostatic or magnetic methods) may not exceed:
-
See PDF for table NR 270.052 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86;
Chapter NR 270 was republished to correct an error in transcription in (2) (intro.) Register October 2024 No. 826. NR 270.053
NR 270.053 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):
NR 270.053(1)
(1) The concentration of pollutants discharged in mine drainage from mines obtaining titanium ores from lode deposits may not exceed:
-
See PDF for table NR 270.053(2)
(2) The concentration of pollutants discharged from mills beneficiating titanium ores by electrostatic methods, magnetic and physical methods, or flotation methods may not exceed:
-
See PDF for table NR 270.053(3)
(3) The concentration of pollutants discharged in mine drainage from mines engaged in the dredge mining of placer deposits of sands containing rutile, ilmenite, leucoxene, monazite, or zircon and the milling techniques employed in conjunction with the dredge mining activity (milling techniques employed include the use of wet gravity methods in conjunction with electrostatic or magnetic methods) may not exceed:
-
See PDF for table NR 270.053 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.054
NR 270.054 New source performance standards (NSPS). Except as provided in ss.
NR 270.0015,
270.002 and
270.003, any new source subject to this subcategory shall achieve the following NSPS representing the degree of effluent reduction attainable by the application of the best available demonstrated technology (BADT):
NR 270.054(1)
(1) The concentration of pollutants discharged in mine drainage from mines obtaining titanium ores from lode deposits may not exceed:
-
See PDF for table NR 270.054(2)
(2) The concentration of pollutants discharged from mills beneficiating titanium ores by electrostatic methods, magnetic and physical methods, or flotation methods may not exceed:
-
See PDF for table NR 270.054(3)
(3) The concentration of pollutants discharged in mine drainage from mines engaged in the dredge mining of placer deposits of sands containing rutile, ilmenite, leucoxene, monazite, or zircon and the milling techniques employed in conjunction with the dredge mining activity (milling techniques employed include the use of wet gravity methods in conjunction with electrostatic or magnetic methods) may not exceed:
-
See PDF for table NR 270.054 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.06
NR 270.06 Applicability; description of the tungsten ore subcategory. The provisions of this subcategory are applicable to discharges from:
NR 270.06(2)
(2) Mills that process tungsten ore by either the gravity separation or froth-flotation methods.
NR 270.06 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.062
NR 270.062 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
NR 270.062(1)
(1) The concentration of pollutants in mine drainage from mines producing 5000 metric tons (5512 short tons) or more of tungsten bearing ores per year may not exceed:
-
See PDF for table NR 270.062(2)
(2) The concentration of pollutants discharged in mine drainage from mines producing less than 5000 metric tons (5512 short tons) or discharged from mills processing less than 5000 metric tons (5512 short tons) of tungsten ores per year by methods other than ore leaching may not exceed:
-
See PDF for table NR 270.062(3)
(3) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of tungsten ores per year by purely physical methods including ore crushing, washing, jigging, heavy media separation, and magnetic and electrostatic separation may not exceed:
-
See PDF for table NR 270.062(4)
(4) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of tungsten ores per year by froth flotation methods may not exceed:
-
See PDF for table NR 270.062 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.063
NR 270.063 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):
NR 270.063 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.064
NR 270.064 New source performance standards (NSPS). Except as provided in ss.
NR 270.0015,
270.002 and
270.003, any new source subject to this subcategory shall achieve the following NSPS representing the degree of effluent reduction attainable by the application of the best available demonstrated technology (BADT):
NR 270.064 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.07
NR 270.07 Applicability; description of the nickel ore subcategory. The provisions of this subcategory are applicable to discharges from:
NR 270.07 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-96.
NR 270.072
NR 270.072 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
NR 270.072(1)
(1) The concentration of pollutants discharged in mine drainage from mines producing 5000 metric tons (5512 short tons) or more of nickel bearing ores per year may not exceed:
-
See PDF for table NR 270.072(2)
(2) The concentration of pollutants discharged in mine drainage from mines producing less than 5000 metric tons (5512 short tons) or discharged from mills processing less than 5000 metric tons (5512 short tons) of nickel ores per year by methods other than ore leaching may not exceed:
-
See PDF for table NR 270.072(3)
(3) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of nickel ores per year by purely physical methods including ore crushing, washing, jigging, heavy media separation, and magnetic and electrostatic separation may not exceed:
-
See PDF for table NR 270.072(4)
(4) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of nickel ore per year by froth flotation methods may not exceed:
-
See PDF for table NR 270.072 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.08
NR 270.08 Applicability; description of the vanadium ore subcategory. The provisions of this subcategory are applicable to discharge from:
NR 270.08(1)
(1) Mines that produce vanadium ore (recovered alone and not as a by-product of uranium mining and mills); and
NR 270.08(2)
(2) Mills that process vanadium ore (recovered alone, not as a by-product of uranium mining and mills).
NR 270.08 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.082
NR 270.082 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reductio attainable by the application of the best practicable control technology currently available (BPT):
NR 270.082(1)
(1) The concentration of pollutants discharged in mine drainage from mines producing 5000 metric tons (5512 short tons) or more of vanadium bearing ores per year may not exceed:
-
See PDF for table NR 270.082(2)
(2) The concentration of pollutants discharged in mine drainage from mines producing less than 5000 metric tons (5512 short tons) or discharged from mills processing less than 5000 metric tons (5512 short tons) of vanadium ore per year by methods other than ore leaching may not exceed:
-
See PDF for table NR 270.082(3)
(3) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of vanadium ores per year by purely physical methods including ore crushing, washing, jigging, heavy media separation, and magnetic and electrostatic separation may not exceed:
-
See PDF for table NR 270.082(4)
(4) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of vanadium ores per year by froth flotation methods may not exceed:
-
See PDF for table NR 270.082 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.09
NR 270.09 Applicability; description of the antimony ore subcategory. The provisions of this subcategory are applicable to discharges from:
NR 270.09 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.10
NR 270.10 Applicability; description of the copper, lead, zinc, gold, silver, and molybdenum ores subcategory. The provisions of this subcategory are applicable to discharges from:
NR 270.10(1)
(1) Mines that produce copper, lead, zinc, gold, silver, or molybdenum bearing ores, or any combination of these ores from open-pit or underground operations other than placer deposits;
NR 270.10(2)
(2) Mills that use the froth-flotation process alone or in conjunction with other processes, for the beneficiation of copper, lead, zinc, gold, silver, or molybdenum ores, or any combination of these ores;
NR 270.10(3)
(3) Mines and mills that use dump, heap, in-situ leach or vat-leach processes to extract copper from ores or ore waste materials;
NR 270.10(4)
(4) Mills that use the cyanidation process to extract gold or silver; and
NR 270.10(5)
(5) Mines or mines and mills that use gravity separation methods (including placer or dredge mining or concentrating operations, and hydraulic mining operations) to extract gold ores or silver ores.
NR 270.10 History
History: Cr.
Register, October, 1986, No. 370, eff. 11-1-86.
NR 270.102
NR 270.102 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology (BPT). Except as provided in ss.
NR 270.0015,
270.002 and
270.003 and
40 CFR 125.30-125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
NR 270.102(1)
(1) The concentration of pollutants discharged in mine drainage from mines operated to obtain copper bearing ores, lead bearing ores, zinc bearing ores, gold bearing ores, or silver bearing ores, or any combination of these ores open-pit or underground operations other than placer deposits may not exceed:
-
See PDF for table NR 270.102(2)
(2) The concentration of pollutants discharged from mills which employ the froth flotation process alone or in conjunction with other processes, for the beneficiation of copper ores, lead ores, zinc ores, gold ores, or silver ores, or any combination of these ores may not exceed:
-
See PDF for table NR 270.102(3)(a)(a) Except as provided in this subsection, there may not be discharge of process wastewater to navigable water from mines and mills which employ dump, heap, in-situ leach or vat leach processes for the extraction of copper from ores or ore waste materials.
