40 C.F.R. § 467.23
Current through September 30, 2024
Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The discharge of process wastewater pollutants from the core shall not exceed the values set forth below:
Subpart B
Core
| Pollutant or pollutant property | BAT effluent limitations | |
| 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 |
Subpart B
Direct Chill Casting Contact Cooling Water
| Pollutant or pollutant property | BAT effluent limitations | |
| 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 |
Subpart B
Solution Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | BAT Effluent Limitations | |
| 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 |
Subpart B
Cleaning or Etching Bath
| Pollutant or pollutant property | BAT effluent limitations | |
| 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 |
Subpart B
Cleaning or Etching Rinse
| Pollutant or pollutant property | BAT effluent limitations | |
| 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 |
Subpart B
Cleaning or Etching Scrubber Liquor
| Pollutant or pollutant property | BAT effluent limitations | |
| 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 |
40 C.F.R. §467.23