Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 273 - Nonferrous metals forming and metal powders › Subchapter VIII - Zinc › Section NR 273.082 - 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
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 BPT:
Table 8-1
Zinc
Rolling Spent Emulsions
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  rolled with emulsions
Chromium
0.0006
0.0003
Copper
0.003
0.002
Cyanide
0.0004
0.0002
Zinc
0.002
0.0009
Oil and grease
0.028
0.017
Total suspended solids
0.057
0.027
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-2
Zinc
Rolling Contact Cooling Water
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  rolled with contact cooling water
Chromium
0.236
0.0097
Copper
1.02
0.536
Cyanide
0.156
0.065
Zinc
0.783
0.327
Oil and grease
10.7
6.43
Total suspended solids
22.0
10.5
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-3
Zinc
Drawing Spent Emulsions
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  drawn with emulsions
Chromium
0.003
0.001
Copper
0.011
0.006
Cyanide
0.002
0.0007
Zinc
0.009
0.004
Oil and grease
0.116
0.070
Total suspended solids
0.238
0.113
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-4
Zinc
Direct Chill Casting Contact Cooling Water
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off- pounds) of
								  zinc cast by the direct chill method
Chromium
0.222
0.091
Copper
0.960
0.505
Cyanide
0.147
0.061
Zinc
0.738
0.308
Oil and grease
10.1
6.06
Total suspended solids
20.7
9.85
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-5
Zinc
Heat Treatment Contact Cooling Water
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  heat treated
Chromium
0.336
0.138
Copper
1.45
0.763
Cyanide
0.221
0.092
Zinc
1.12
0.466
Oil and grease
15.3
9.16
Total suspended solids
31.3
14.9
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-6
Zinc
Surface Treatment Spent Baths
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  surface treated
Chromium
0.039
0.016
Copper
0.169
0.089
Cyanide
0.026
0.011
Zinc
0.130
0.054
Oil and grease
1.78
1.07
Total suspended solids
3.64
1.73
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-7
Zinc
Surface Treatment Rinse
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  surface treated
Chromium
1.58
0.645
Copper
6.80
3.58
Cyanide
1.04
0.430
Zinc
5.23
2.19
Oil and grease
71.6
43.0
Total suspended solids
147
69.8
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-8
Zinc
Alkaline Cleaning Spent Baths
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  alkaline cleaned
Chromium
0.002
0.0007
Copper
0.007
0.004
Cyanide
0.001
0.0004
Zinc
0.005
0.002
Oil and grease
0.071
0.043
Total suspended solids
0.146
0.069
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-9
Zinc
Alkaline Cleaning Rinse
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  alkaline cleaned
Chromium
0.744
0.304
Copper
3.21
1.69
Cyanide
0.490
0.203
Zinc
2.47
1.03
Oil and grease
33.8
20.3
Total suspended solids
69.3
33.0
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-10
Zinc
Sawing or Grinding Spent Emulsions
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  sawed or ground with emulsions
Chromium
0.011
0.005
Copper
0.045
0.024
Cyanide
0.007
0.003
Zinc
0.035
0.015
Oil and grease
0.476
0.286
Total suspended solids
0.976
0.464
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 8-11
Zinc
Electrocoating Rinse
BPT Effluent Limitations
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of zinc
								  electrocoated
Chromium
1.01
0.412
Copper
4.35
2.29
Cyanide
0.664
0.275
Zinc
3.35
1.40
Oil and grease
45.8
27.5
Total suspended solids
93.9
44.7
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all
					 times