(a) 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.
(b) There shall be no discharge allowance for wastewater pollutants from the degassing operation.
(c) The mass of wastewater pollutants from the core and ancillary operations except those identified in paragraph (b), introduced into a POTW shall not exceed the following values:
Subpart C
Core
| Pollutant or pollutant property | PSES | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of extruded | ||
| Chromium | 0.15 | 0.061 |
| Cyanide | 0.098 | 0.041 |
| Zinc | 0.49 | 0.21 |
| TTO | 0.23 | |
| Oil and grease (alternate monitoring parameter) | 18 | 8.8 |
Subpart C
Extrusion Press Leakage
| Pollutant or pollutant property | PSES | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of extruded | ||
| Chromium | 0.65 | 0.27 |
| Cyanide | 0.43 | 0.18 |
| Zinc | 2.16 | 0.90 |
| TTO | 1.02 | |
| Oil and grease (alternate monitoring parameter) | 77 | 39 |
Subpart C
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 | ||
| 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 C
Press 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 C
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 C
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 | 0.26 | 0.109 |
| TTO | 0.124 | |
| Oil and grease (alternate monitoring parameter) | 9.3 | 4.7 |
Subpart C
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 | 1.7 | 0.7 |
| Cyanide | 1.2 | 0.5 |
| Zinc | 5.7 | 2.4 |
| TTO | 2.7 | |
| Oil & Grease (alternate monitoring parameter) | 200 | 100 |
Subpart C
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 | 2.82 | 1.18 |
| TTO | 1.34 | |
| Oil and grease (alternate monitoring parameter) | 100 | 50 |
[48 FR 49149, Oct. 24, 1983; 49 FR 11632, 11633, 11634, Mar. 27, 1984, as amended at 53 FR 52369, Dec. 27, 1988]