Wis. Admin. Code Department of Natural Resources NR 257.12
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 1
Core with an annealing furnace scrubber BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils | ||
Chromium | 0.0360 | 0.0147 |
Cyanide | 0.0237 | 0.0098 |
Zinc | 0.119 | 0.0498 |
Aluminum | 0.525 | 0.257 |
Oil and grease | 1.634 | 0.980 |
Suspended solids | 3.348 | 1.593 |
pH | (1) | (1) |
1Within the range of 7.0 to 10 at all times.
Table 2
Core without an annealing furnace scrubber BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils | ||
Chromium | 0.0244 | 0.010 |
Cyanide | 0.0161 | 0.0067 |
Zinc | 0.0808 | 0.0338 |
Aluminum | 0.356 | 0.174 |
Oil and grease | 1.11 | 0.664 |
Suspended solids | 2.27 | 1.079 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 3
Continuous sheet 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 sheet cast by continuous methods | ||
Chromium | 0.00086 | 0.00035 |
Cyanide | 0.00057 | 0.00024 |
Zinc | 0.0029 | 0.0012 |
Aluminum | 0.0127 | 0.0063 |
Oil and grease | 0.0393 | 0.0236 |
Suspended solids | 0.805 | 0.0383 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 4
Solution heat treatment contact cooling water BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/ of million off-lbs)aluminu m 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 pH | 315.91 (1) | 150.25 (1) |
1 Within the range of 7.0 to 10 at all times.
Table 5
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 | 0.110 |
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 6
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 | 44.52 |
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 7
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.
Wis. Admin. Code Department of Natural Resources NR 257.12