Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 255 - Battery manufacturing › Subchapter VIII - Zinc Subcategory › Section NR 255.71 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

Current through June 24, 2024
(1) Except as provided in
				  40 CFR 125.30
				  to
				  125.32, any
				  existing source subject to this subchapter shall achieve the following effluent
				  limitations representing the degree of effluent reduction attainable by the
				  application of BPT:
Table 113
Wet Amalgamated Powder Anodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg zinc
English units -
lb/million lbs of zinc
Chromium
1.67
0.68
Mercury
0.95
0.38
Silver
1.56
0.65
Zinc
5.55
2.32
Manganese
2.58
1.10
Oil and grease
76.0
45.6
TSS
155.8
74.1
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 114
Gelled Amalgam Anodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of zinc
English units -
lb/million lbs of zinc
Chromium
0.30
0.12
Mercury
0.17
0.07
Silver
0.28
0.12
Zinc
0.99
0.42
Manganese
0.46
0.20
Oil and grease
13.6
8.16
TSS
27.9
13.26
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 115
Zinc Oxide, Formed Anodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of zinc
English units -
lb/million lbs of zinc
Chromium
62.9
25.7
Mercury
35.8
14.3
Silver
58.7
24.3
Zinc
208.8
87.2
Manganese
97.2
41.5
Oil and grease
2,860.0
1,716.0
TSS
5,863.0
2,789.0
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 116
Electrodeposited Anodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of zinc deposited
English units -
lb/million lbs of zinc deposited
Chromium
1,404.0
574.0
Mercury
798.0
319.0
Silver
1,308.0
543.0
Zinc
4,657.0
1,948.0
Manganese
2,169.0
925.0
Oil and grease
63,800.0
38,280.0
TSS
130,700.0
62,210.0
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 117
Silver Powder, Formed Cathodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of silver applied
English units -
lb/million lbs of silver applied
Chromium
86.2
35.3
Mercury
49.0
19.6
Silver
80.4
33.3
Zinc
286.2
119.6
Manganese
133.3
56.8
Oil and grease
3,920.0
2,350.0
TSS
8,036.0
3,822.0
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 118
Silver Oxide Powder, Formed Cathodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of silver applied
English units -
lb/million lbs of silver applied
Chromium
57.7
23.6
Mercury
32.8
13.1
Silver
53.7
22.3
Zinc
191.3
79.9
Manganese
89.1
38.0
Oil and grease
2,620.0
1,570.0
TSS
5,370.0
2,554.0
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 119
Silver Peroxide Cathodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of silver applied
English units -
lb/million lbs of silver applied
Chromium
13.8
5.65
Mercury
7.85
3.14
Silver
12.9
5.34
Zinc
45.8
19.2
Manganese
21.4
9.11
Oil and grease
628.0
377.0
TSS
1,287.0
612.0
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 120
Nickel Impregnated Cathodes
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of nickel applied
English units -
lb/million lbs of nickel applied
Chromium
721.6
295.2
Mercury
410.0
164.0
Nickel
3,149.0
2,083.0
Silver
672.4
279.0
Zinc
2,394.4
1,000.4
Manganese
1,115.2
475.6
Oil and grease
32,800.0
19,680.0
TSS
67,240.0
31,980.0
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 121
Miscellaneous Wastewater Streams
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of cells produced
English units -
lb/million lbs of cells produced
Chromium
3.85
1.58
Cyanide
2.54
1.05
Mercury
2.19
0.68
Nickel
16.82
11.12
Silver
3.59
1.49
Zinc
12.79
5.34
Manganese
5.96
2.54
Oil and grease
175.20
105.12
TSS
359.16
170.82
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 122
Silver Etch
BPT
POLLUTANT OR
MAXIMUM FOR
MAXIMUM FOR
POLLUTANT PROPERTY
ANY 1 DAY
MONTHLY AVERAGE
Metric units -
mg/kg of silver processed
English units -
lb/million lbs of silver processed
Chromium
21.6
8.84
Mercury
12.3
4.91
Silver
20.2
8.35
Zinc
71.7
30.0
Manganese
33.4
14.3
Oil and grease
982.0
589.2
TSS
2,013.1
957.5
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 123
Silver Peroxide Production
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units -
mg/kg of silver in silver peroxide
								  produced
English units -
lb/million lbs of silver in silver peroxide
								  produced
Chromium
23.0
9.40
Mercury
13.1
5.22
Silver
21.4
8.88
Zinc
76.2
31.80
Manganese
35.5
15.10
Oil and grease
1,044.0
627.00
TSS
2,140.0
1,018.00
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
Table 124
Silver Powder Production
BPT
POLLUTANT OR
POLLUTANT PROPERTY
MAXIMUM FOR
ANY 1 DAY
MAXIMUM FOR
MONTHLY AVERAGE
Metric units - mg/kg of silver powder
								  produced
English units - lb/million lbs of silver powder
								  produced
Chromium
9.33
3.82
Mercury
5.30
2.12
Silver
8.69
3.61
Zinc
30.95
12.93
Manganese
14.42
6.15
Oil and grease
424.0
254.40
TSS
869.0
413.40
pH
(1)
(1)
1Within the range of 7.5 to 10.0
					 at all times.
(2) There may be no
				  discharge allowance for process wastewater pollutants from any battery
				  manufacturing operation other than those battery manufacturing operations
				  listed in tables 113 to 124.