Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 274 - Nonferrous metals manufacturing › Subchapter XII - Secondary Silver › Section NR 274.124 - New source performance standards

Current through June 24, 2024
Any new source subject to this subchapter shall achieve the
					 following standards:
Table 12-23
Secondary Silver Film Stripping
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver from film
								  stripping
Copper
64.450
30.720
Zinc
51.360
21.150
Ammonia (as N)
6,712.000
2,951.000
Total suspended solids
755.300
604.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-24
Secondary Silver Film Stripping Wet Air Pollution Control
					 and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution
					 Control
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver from
precipitation and filtration of film
stripping solutions
Copper
1.242
0.592
Zinc
0.990
0.408
Ammonia (as N)
129.300
56.840
Total suspended solids
14.550
11.640
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-25
Secondary Silver Precipitation and Filtration of Film
					 Stripping Solutions
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver precipitated
Copper
73.690
35.120
Zinc
58.720
24.180
Ammonia (as N)
7,674.000
3,374.000
Total suspended solids
863.600
690.900
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-26
Secondary Silver Precipitation and Filtration of
					 Photographic Solutions
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver precipitated
Copper
34.048
16.226
Zinc
27.132
11.172
Ammonia (as N)
3,545.000
1,559.000
Total suspended solids
399.000
319.200
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-27
Secondary Silver Precipitation and Filtration of
					 Photographic Solutions Wet Air Pollution Control
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver from precipitation and
								  filtration of photographic solutions
Copper
15.540
7.406
Zinc
12.380
5.099
Ammonia (as N)
1,618.000
711.400
Total suspended solids
182.100
145.700
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-28
Secondary Silver Electrolytic Refining
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounc electroly
e of silver from tic refining
Copper
0.973
0.464
Zinc
0.775
0.319
Ammonia (as N)
101.300
44.540
Total suspended solids
11.400
9.120
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-29
Secondary Silver Furnace Wet Air Pollution Control
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver roasted, smelted, or
								  dried
Copper
0.000
0.000
Zinc
0.000
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 10.0 at all times.
Table 12-30
Secondary Silver Leaching
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver produced from
								  leaching
Copper
0.110
0.053
Zinc
0.088
0.036
Ammonia (as N)
11.470
5.040
Total suspended solids
1.290
1.032
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-31
Secondary Silver Leaching Wet Air Pollution Control and
					 Precipitation of Nonphotographic Solutions Wet Air Pollution Control
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver produced from leaching or
								  precipitated
Copper
5.671
2.703
Zinc
4.519
1.861
Ammonia (as N)
590.500
259.600
Total suspended solids pH
66.450
53.160
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-32
Secondary Silver Precipitation and Filtration of
					 Nonphotographic Solutions
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver precipitated
Copper
3.930
1.873
Zinc
3.132
1.290
Ammonia (as N)
409.300
179.900
Total suspended solids
46.050
36.840
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 12-33
Secondary Silver Floor and Equipment Washdown
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/troy ounce of silver production
Copper
0.000
0.000
Zinc
0.000
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 10.0 at all
					 times.