Wis. Admin. Code Department of Natural Resources NR 257.23
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 BAT:
Table 42
Core operation BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum rolled with emulsions | ||
Chromium | 0.057 | 0.024 |
Cyanide | 0.038 | 0.016 |
Zinc | 0.19 | 0.079 |
Aluminum | 0.84 | 0.42 |
Table 43
Direct chill casting contact cooling water BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cast | ||
Chromium | 0.59 | 0.24 |
Cyanide | 0.39 | 0.16 |
Zinc | 1.94 | 0.81 |
Aluminum | 8.55 | 4.26 |
Table 44
Solution heat treatment contact cooling water BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
Chromium | 0.90 | 0.37 |
Cyanide | 0.59 | 0.25 |
Zinc | 2.98 | 1.25 |
Aluminum | 13.10 | 6.52 |
Table 45
Cleaning or etching bath BAT
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 | 0.26 | 0.109 |
Aluminum | 1.15 | 0.573 |
Table 46
Cleaning or etching rinse and hot water seal BAT
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 | 0.61 | 0.25 |
Cyanide | 0.41 | 0.17 |
Zinc | 2.03 | 0.85 |
Aluminum | 8.95 | 4.45 |
Table 47
Cleaning or etching scrubber liquor BAT
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 | 0.85 | 0.35 |
Cyanide | 0.56 | 0.23 |
Zinc | 2.82 | 1.18 |
Aluminum | 12.43 | 6.19 |
Wis. Admin. Code Department of Natural Resources NR 257.23