40 C.F.R. § 467.25
Current through September 30, 2024
Except as provided in 40 CFR 403.7 and 403.13 , any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in aluminum forming process wastewater introduced into a POTW shall not exceed the following values:
Subpart B
Core
| Pollutant or pollutant property | PSES | |
| 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 | 0.190 | 0.079 |
| TTO | 0.090 | |
| Oil and grease (alternate monitoring parameter) | 6.8 | 3.4 |
Subpart B
Direct Chill Casting Contact Cooling Water
| Pollutant or pollutant property | PSES | |
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum cast by semi-continuous methods | ||
| Chromium | 0.59 | 0.24 |
| Cyanide | 0.39 | 0.16 |
| Zinc | 1.94 | 0.81 |
| TTO | 0.92 | |
| Oil and grease (alternate monitoring parameter) | 69 | 35 |
Subpart B
Solution Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | PSES | |
| 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 |
| TTO | 1.41 | |
| Oil and grease (alternate monitoring parameter) | 110 | 53 |
Subpart B
Cleaning or Etching Bath
| Pollutant or pollutant property | PSES | |
| 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 |
| TTO | 0.124 | |
| Oil and grease (alternate monitoring parameter) | 9.3 | 4.7 |
Subpart B
Cleaning or Etching Rinse
| Pollutant or pollutant property | PSES | |
| 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 |
| TTO | 0.96 | |
| Oil and grease (alternate monitoring parameter) | 73 | 36 |
Subpart B
Cleaning or Etching Scrubber Liquor
| Pollutant or pollutant property | PSES | |
| 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 | 2.83 | 1.18 |
| TTO | 1.34 | |
| Oil and grease (alternate monitoring parameter) | 100 | 50 |
40 C.F.R. §467.25