Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 257 - Aluminum forming › Subchapter VI - The Drawing With Emulsions or Soaps Subcategory › Section NR 257.62 - Effluent limitations representing the degree of effluent reduction attainable by 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 the application of BPT:
Table 160
Core operation BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum drawn
								  with emulsions or soaps
Chromium
0.205
0.084
Cyanide
0.135
0.056
Zinc
0.680
0.285
Aluminum
3.00
1.50
Oil and grease
9.33
5.60
Suspended solids
19.12
9.10
pH
(1)
(1)
1 Within the range of 7.0 to 10 at all times.
Table 161
Continuous rod casting spent lubricant
					 BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum
								  cast
Chromium
0.0009
0.0004
Cyanide
0.0006
0.0003
Zinc
0.0029
0.001
Aluminum
0.013
0.007
Oil and grease
0.040
0.024
Suspended solids
0.081
0.039
PH
(1)
(1)
1 Within the range of 7.0 to 10 at all times.
Table 162
Continuous rod casting contact cooling water
					 BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum
								  cast
Chromium
0.684
0.28
Cyanide
0.450
0.187
Zinc
2.27
0.949
Aluminum
10.00
4.976
Oil and grease
31.10
18.66
Suspended solids
63.76
30.323
pH
(1)
(1)
1 Within the range of 7.0 to 10 at all times.
Table 163
Solution heat treatment contact cooling water
					 BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum
								  quenched
Chromium
3.39
1.39
Cyanide
2.24
0.93
Zinc
11.25
4.70
Aluminum
49.55
24.66
Oil and grease
154.10
92.46
Suspended solids
315.91
150.25
pH
(1)
(1)
1 Within the range of 7.0 to 10 at all times.
Table 164
Cleaning or etching bath BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum
								  cleaned or etched
Chromium
0.079
0.032
Cyanide
0.052
0.022
Zinc
0.262
0.109
Aluminum
1.15
0.573
Oil and grease
3.58
2.15
Suspended solids
7.34
3.49
pH
(1)
(1)
1 Within the range of 7.0 to 10 at all times.
Table 165
Cleaning or etching rinse and hot water seal
					 BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum
								  cleaned or etched
Chromium
6.12
2.51
Cyanide
4.04
1.67
Zinc
20.31
8.49
Aluminum
89.46
44.519
Oil and grease
278.24
166.95
Suspended solids
570.39
271.29
pH
(1)
(1)
1 Within the range of 7.0 to 10 at all times.
Table 166
Cleaning or etching scrubber liquor
					 BPT
Pollutant or pollutant property
Maximum for any 1 day
Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum
								  cleaned or etched
Chromium
7.00
2.86
Cyanide
4.61
1.91
Zinc
23.22
9.70
Aluminum
102.24
50.88
Oil and grease
318.00
190.80
Suspended solids
651.90
310.05
pH
(1)
(1)
1 Within the range of 7.0 to 10 at all
					 times.