Wis. Admin. Code NR § 257.33
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. Degassing operations may not discharge wastewater pollutants.
Table 75
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 extruded | ||
Chromium | 1.7 | 0.7 |
Cyanide | 1.2 | 0.5 |
Zinc | 5.7 | 2.4 |
Aluminum | 25.0 | 13.0 |
Table 76
Extrusion press leakage BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum extruded | ||
Chromium | 0.65 | 0.27 |
Cyanide | 0.43 | 0.18 |
Zinc | 2.16 | 0.90 |
Aluminum | 9.51 | 4.73 |
Table 77
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 78
Press 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 79
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 80
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 | 0.262 | 0.109 |
Aluminum | 1.15 | 0.58 |
Table 81
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 | 1.7 | 0.7 |
Cyanide | 1.2 | 0.5 |
Zinc | 5.7 | 2.4 |
Aluminum | 25.0 | 13.0 |
Table 82
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 257.33