Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 274 - Nonferrous metals manufacturing › Subchapter XXVI - Secondary Precious Metals › Section NR 274.263 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

Current through June 24, 2024
Except as provided in
					 40 CFR 125.30
					 to
					 125.32, any
					 existing point source subject to this subchapter shall achieve the following
					 effluent limitations representing the degree of effluent reduction attainable
					 by application of BAT:
Table 26-15
Secondary Precious Metals Furnace Wet Air Pollution
					 Control
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of precious metals, including
								  silver, incinerated or smelted
Copper
5.760
2.745
Cyanide
0.900
0.360
Zinc
4.590
1.890
Combined metals
1.350
Ammonia (as N)
599.900
263.700
Table 26-16
Secondary Precious Metals Raw Material
					 Granulation
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of precious metal in the granulated
								  raw material
Copper
0.819
0.390
Cyanide
0.128
0.051
Zinc
0.653
0.269
Combined metals
0.192
Ammonia (as N)
85.310
37.500
Table 26-17
Secondary Precious Metals Spent Plating
					 Solutions
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/liter of spent plating solution used as a raw
								  material
Copper
1.280
0.610
Cyanide
0.200
0.080
Zinc
1.020
0.420
Combined metals
0.300
Ammonia (as N)
133.300
58.600
Table 26-18
Secondary Precious Metals Spent Cyanide Stripping
					 Solutions
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of gold produced by cyanide
								  stripping
Copper
4.736
2.257
Cyanide
0.740
0.296
Zinc
3.774
1.554
Combined metals
1.110
Ammonia (as N)
493.200
216.800
Table 26-19
Secondary Precious Metals Refinery Wet Air Pollution
					 Control(1)
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of precious metals, including
								  silver, produced in the refinery
Copper
1.280
0.610
Cyanide
0.200
0.080
Zinc
1.020
0.420
Combined metals
0.300
Ammonia (as N)
133.300
58.600
(1) This allowance applies to either acid or alkaline wet
					 air pollution control scrubbers. If both acid and alkaline wet air pollution
					 control scrubbers are present in a particular facility, the same allowance
					 applies to each.
Table 26-20
Secondary Precious Metals Gold Solvent Extraction
					 Raffinate and Wash Water
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of gold produced by solvent
								  extraction
Copper
0.806
0.384
Cyanide
0.126
0.050
Zinc
0.643
0.265
Combined metals
0.189
Ammonia (as N)
83.980
36.920
Table 26-21
Secondary Precious Metals Gold Spent
					 Electrolyte
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of gold produced by
								  electrolysis
Copper
0.0111
0.0053
Cyanide
0.0017
0.0007
Zinc
0.0089
0.0037
Combined metals
0.0030
Ammonia (as N)
1.1600
0.5100
Table 26-22
Secondary Precious Metals Gold Precipitation and
					 Filtration
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of gold precipitated
Copper
5.632
2.684
Cyanide
0.880
0.352
Zinc
4.488
1.848
Combined metals
1.320
Ammonia (as N)
586.500
257.800
Table 26-23
Secondary Precious Metals Platinum Precipitation and
					 Filtration
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of platinum precipitated
Copper
6.656
3.172
Cyanide
1.040
0.416
Zinc
5.304
2.184
Combined metals
1.560
Ammonia (as N)
693.200
304.700
Table 26-24
Secondary Precious Metals Palladium Precipitation
					 and Filtration
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of palladium precipitated
Copper
7.680
3.660
Cyanide
1.200
0.480
Zinc
6.120
2.520
Combined metals
1.800
Ammonia (as N)
799.800
351.600
Table 26-25
Secondary Precious Metals Other Platinum Group
					 Metals Precipitation and Filtration
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of other platinum group metals
								  precipitated
Copper
6.656
3.172
Cyanide
1.040
0.416
Zinc
5.304
2.184
Combined metals
1.560
Ammonia (as N)
693.200
304.700
Table 26-26
Secondary Precious Metals Spent Solution for PGC
					 Salt Production
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of gold contained in PGC
								  product
Copper
1.152
0.549
Cyanide
0.180
0.072
Zinc
0.918
0.376
Combined metals
0.270
Ammonia (as N)
120.000
52.740
Table 26-27
Secondary Precious Metals Equipment and Floor
					 Wash
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of precious metals, including
								  silver, produced in the refinery
Copper
0.000
0.000
Cyanide
0.000
0.000
Zinc
0.000
0.000
Combined metals
0.000
Ammonia (as N)
0.000
0.000
Table 26-28
Secondary Precious Metals Preliminary
					 Treatment
BAT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of total precious metals produced
								  through this operation
Copper
64.000
30.500
Cyanide
10.000
4.000
Zinc
51.000
21.000
Combined metals
15.000
Ammonia (as N)
6,665.000
2,930.000