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 274.264 - New source performance standards

Current through June 24, 2024
Any new source subject to this subchapter shall achieve the
					 following standards:
Table 26-29
Secondary Precious Metals Furnace Wet Air Pollution
					 Control
NSPS
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
Total suspended solids
67.500
54.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-30
Secondary Precious Metals Raw Material
					 Granulation
NSPS
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
Total suspended solids
9.600
7.680
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-31
Secondary Precious Metals Spent Plating
					 Solutions
NSPS
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
Total suspended solids
15.000
12.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-32
Secondary Precious Metals Spent Cyanide Stripping
					 Solutions
NSPS
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
Total suspended solids
55.500
44.400
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-33
Secondary Precious Metals Refinery Wet Air Pollution
					 Control(1)
NSPS
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
Total suspended solids
15.000
12.000
pH
(2)
(2)
w
(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.
(2) Within the range of 7.5 to 10 at all times.
Table 26-34
Secondary Precious Metals Gold Solvent Extraction
					 Raffinate and Wash Water
NSPS
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
Total suspended solids
9.450
7.560
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-35
Secondary Precious Metals Gold Spent
					 Electrolyte
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of gold produced by
								  electrolysis
Copper
0.011
0.005
Cyanide
0.002
0.001
Zinc
0.009
0.004
Combined metals
0.003
Ammonia (as N)
1.160
0.510
Total suspended solids
0.131
0.104
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-36
Secondary Precious Metals Gold Precipitation and
					 Filtration
NSPS
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
Total suspended solids
66.000
52.800
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-37
Secondary Precious Metals Platinum Precipitation and
					 Filtration
NSPS
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
Total suspended solids pH
78.000 (1)
62.400 (1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-38
Secondary Precious Metals Palladium Precipitation
					 and Filtration
NSPS
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
Total suspended solids
90.000
72.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-39
Secondary Precious Metals Other Platinum Group
					 Metals Precipitation and Filtration
NSPS
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
Total suspended solids
78.000
62.400
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-40
Secondary Precious Metals Spent Solution for PGC
					 Salt Production
NSPS
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
0.378
Combined metals
0.270
Ammonia (as N)
120.000
52.740
Total suspended solids
13.500
10.800
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-41
Secondary Precious Metals Equipment and Floor
					 Wash
NSPS
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
Total suspended solids
0.000
0.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10 at all times.
Table 26-42
Secondary Precious Metals Preliminary
					 Treatment
NSPS
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
50.000
Cyanide
10.000
6.000
Zinc
51.000
30.500
Ammonia (as N)
6,665.000
2,930.000
Combined metals
15.000
Total suspended solids
750.000
600.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.