Wis. Admin. Code Department of Natural Resources NR 257.34
Any new source subject to this subchapter shall achieve the following performance standards. Degassing operations may not discharge wastewater pollutants.
Table 83
Core operation NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum extruded | ||
Chromium | 0.13 | 0.051 |
Cyanide | 0.068 | 0.027 |
Zinc | 0.35 | 0.14 |
Aluminum | 2.07 | 0.92 |
Oil and grease | 3.39 | 3.39 |
Suspended solids | 5.10 | 4.07 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 84
Extrusion press leakage NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum extruded | ||
Chromium | 0.11 | 0.045 |
Cyanide | 0.060 | 0.024 |
Zinc | 0.31 | 0.126 |
Aluminum | 1.82 | 0.81 |
Oil and grease | 2.98 | 2.98 |
Suspended solids | 4.47 | 3.58 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 85
Direct chill casting contact cooling water NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum cast by semicontinuous methods | ||
Chromium | 0.4 | 0.20 |
Cyanide | 0.27 | 0.11 |
Zinc | 1.36 | 0.56 |
Aluminum | 8.12 | 3.60 |
Oil and grease | 13.29 | 13.29 |
Suspended solids | 19.94 | 15.95 |
pH | (1) | (1) |
1 The pH shall be maintained within the range of 7.0 to 10.0 at all times, except for those situations when this waste stream is discharged separately and without commingling with any other wastewater, in which case the pH shall be within the range of 6.0 to 10.0 at all times.
Table 86
Press heat treatment contact cooling water NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
Chromium | 0.76 | 0.31 |
Cyanide | 0.41 | 0.17 |
Zinc | 2.08 | 0.86 |
Aluminum | 12.45 | 5.52 |
Oil and grease | 20.37 | 20.37 |
Suspended solids | 30.56 | 24.45 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 87
Solution heat treatment contact cooling water NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
Chromium | 0.76 | 0.31 |
Cyanide | 0.41 | 0.17 |
Zinc | 2.08 | 0.86 |
Aluminum | 12.45 | 5.52 |
Oil and grease | 20.37 | 20.37 |
Suspended solids | 30.56 | 24.45 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 88
Cleaning or etching bath NSPS
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 | 0.067 | 0.027 |
Cyanide | 0.036 | 0.015 |
Zinc | 0.183 | 0.075 |
Aluminum | 1.094 | 0.485 |
Oil and grease | 1.79 | 1.79 |
Suspended solids | 2.69 | 2.15 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 89
Cleaning or etching rinse and hot water seal NSPS
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 | 0.52 | 0.21 |
Cyanide | 0.28 | 0.11 |
Zinc | 1.42 | 0.59 |
Aluminum | 8.50 | 3.77 |
Oil and grease | 13.91 | 13.91 |
Suspended solids | 20.87 | 16.70 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Table 90
Cleaning or etching scrubber liquor NSPS
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 | 0.72 | 0.29 |
Cyanide | 0.39 | 0.16 |
Zinc | 1.97 | 0.81 |
Aluminum | 11.81 | 5.24 |
Oil and grease | 19.33 | 19.33 |
Suspended solids | 29.00 | 23.20 |
pH | (1) | (1) |
1 Within the range of 7.0 to 10 at all times.
Wis. Admin. Code Department of Natural Resources NR 257.34