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| Subpart C | Extrusion Subcategory | 467.30 – 467.37 | ||||||||||||||||||||||||
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Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307(b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), 1317(b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4.
48 FR 49149, Oct. 24, 1983, unless otherwise noted.
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This subpart applies to discharges of pollutants to waters of the United States and introductions of pollutants into publicly owned treatment works from the core and the ancillary operations of the extrusion subcategory.
For the purpose of this subpart:
(a) The “core” of the extrusion subcategory shall include extrusion die cleaning, dummy block cooling, stationary casting, artificial aging, annealing, degreasing, and sawing.
(b) The term “extrusion die cleaning” shall mean the process by which the steel dies used in extrusion of aluminum are cleaned. The term includes a dip into a concentrated caustic bath to dissolve the aluminum followed by a water rinse. It also includes the use of a wet scrubber with the die cleaning operation.
(c) The term “ancillary operation” shall mean any operation not previously included in the core, performed on-site, following or preceding the extrusion operation. The ancillary operations shall include direct chill casting, press or solution heat treatment, cleaning or etching, degassing, and extrusion press hydraulic fluid leakage.
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 practicable control technology currently available:
Subpart C
Core
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum extruded | ||
| Chromium | 0.16 | 0.066 |
| Cyanide | 0.11 | 0.044 |
| Zinc | 0.53 | 0.22 |
| Aluminum | 2.34 | 1.16 |
| Oil and grease | 7.32 | 4.39 |
| Suspended solids | 15.0 | 7.13 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
Subpart C
Extrusion Press Leakage
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| 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 |
| Oil and grease | 29.56 | 17.74 |
| Suspended solids | 60.60 | 28.82 |
| pH | (1) | (1) |
| 1 With the range of 7.0 to 10.0 at all times. | ||
Subpart C
Direct Chill Casting Contact Cooling Water
| Pollutant or pollutant property | BPT 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 |
| Oil and grease | 26.58 | 15.95 |
| Suspended solids | 54.49 | 25.92 |
| 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. | ||
Subpart C
Press Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
| Chromium | 3.39 | 1.39 |
| Cyanide | 2.24 | 0.93 |
| Zinc | 11.25 | 4.70 |
| Aluminum | 49.55 | 24.66 |
| Oil and grease | 154.10 | 92.46 |
| Suspended solids | 315.91 | 150.25 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
Subpart C
Solution Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum quenched | ||
| Chromium | 3.39 | 1.39 |
| Cyanide | 2.24 | 0.93 |
| Zinc | 11.25 | 4.70 |
| Aluminum | 49.55 | 24.66 |
| Oil and grease | 154.10 | 92.46 |
| Suspended solids | 315.91 | 150.25 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
Subpart C
Cleaning or Etching Bath
| Pollutant or pollutant property | BPT 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 |
| Oil and grease | 3.58 | 2.15 |
| Suspended solids | 7.34 | 3.49 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
Subpart C
Cleaning or Etching Rinse
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | ||
| Chromium | 6.12 | 2.51 |
| Cyanide | 4.04 | 1.67 |
| Zinc | 20.31 | 8.49 |
| Aluminum | 89.46 | 44.52 |
| Oil and grease | 278.24 | 166.95 |
| Suspended solids | 570.39 | 271.29 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
Subpart C
Cleaning or Etching Scrubber Liquor
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched | ||
| Chromium | 7.00 | 2.86 |
| Cyanide | 4.61 | 1.91 |
| Zinc | 23.22 | 9.70 |
| Aluminum | 102.24 | 50.88 |
| Oil and grease | 318.00 | 190.80 |
| Suspended solids | 651.90 | 310.05 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
Subpart C
Degassing Scrubber Liquor
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum degassed | ||
| Chromium | 1.15 | 0.47 |
| Cyanide | 0.76 | 0.32 |
| Zinc | 3.81 | 1.59 |
| Aluminum | 16.78 | 8.35 |
| Oil and grease | 52.18 | 31.31 |
| Suspended solids | 106.97 | 50.88 |
| pH | (1) | (1) |
| 1 Within the range of 7.0 to 10.0 at all times. | ||
[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11633, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]
(a) 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:
(b) There shall be no discharge allowance for wastewater pollutants from the degassing operation.
(c) The discharge of wastewater pollutants from the core and ancillary operation except those in (b) of this section, shall not exceed the values set forth below:
Subpart C
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 extruded | ||
| Chromium | 0.15 | 0.061 |
| Cyanide | 0.098 | 0.041 |
| Zinc | 0.49 | 0.21 |
| Aluminum | 2.19 | 1.09 |
Subpart C
Extrusion Press Leakage
| 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 extruded | ||
| Chromium | 0.65 | 0.27 |
| Cyanide | 0.43 | 0.18 |
| Zinc | 2.16 | 0.90 |
| Aluminum | 9.51 | 4.73 |
Subpart C
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 C
Press 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 C
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 C
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 | 0.262 | 0.109 |
| Aluminum | 1.15 | 0.58 |
Subpart C
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 | 1.7 | 0.7 |
| Cyanide | 1.2 | 0.5 |
| Zinc | 5.7 | 2.4 |
| Aluminum | 25 | 13 |
Subpart C
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 |
[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11633, 11634, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]
Any new source subject to this subpart must achieve the following performance standards.
(a) There shall be no discharge allowance for wastewater pollutants from the degassing operation.
(b) The discharge of wastewater pollutants from the core and ancillary operations except those listed in paragraph (a) shall not exceed the values set forth below:
Subpart C
Core
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
Subpart C
Extrusion Press Leakage
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
Subpart C
Direct Chill Casting Contact Cooling Water
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum cast by semicontinuous methods | ||
| Chromium | 0.49 | 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. | ||
Subpart C
Press Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
Subpart C
Solution Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
Subpart C
Cleaning or Etching Bath
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
Subpart C
Cleaning or Etching Rinse
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
Subpart C
Cleaning or Etching Scrubber Liquor
| Pollutant or pollutant property | NSPS | |
|---|---|---|
| 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 10.0 at all times. | ||
[48 FR 49149, Oct. 24, 1983; 49 FR 11633, 11634, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]
(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]
(a) Except as provided in 40 CFR 403.7, any new 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 new 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 values set forth below:
Subpart C
Core
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of extruded | ||
| Chromium | 0.13 | 0.05 |
| Cyanide | 0.07 | 0.03 |
| Zinc | 0.35 | 0.15 |
| TTO | 0.24 | |
| Oil and grease (alternate monitoring parameter) | 3.40 | 3.40 |
Subpart C
Extrusion Press Leakage
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of hard alloy aluminum extruded | ||
| Chromium | 0.11 | 0.05 |
| Cyanide | 0.06 | 0.03 |
| Zinc | 0.31 | 0.13 |
| TTO | 0.21 | |
| Oil and grease (alternate monitoring parameter) | 2.98 | 2.98 |
Subpart C
Direct Chill Casting Contact Cooling Water
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| Maximum for any 1 day | Maximum for monthly average | |
| mg/off-kg (lb/million off-lbs) of aluminum cast | ||
| Chromium | 0.49 | 0.20 |
| Cyanide | 0.27 | 0.11 |
| Zinc | 1.36 | 0.56 |
| TTO | 0.92 | |
| Oil and grease (alternate monitoring parameter) | 13.29 | 13.29 |
Subpart C
Press Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| 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 |
| TTO | 1.41 | |
| Oil and grease (alternate monitoring parameter) | 20.37 | 20.37 |
Subpart C
Solution Heat Treatment Contact Cooling Water
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| 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 |
| TTO | 1.41 | |
| Oil and grease (alternate monitoring parameter) | 20.37 | 20.37 |
Subpart C
Cleaning or Etching Bath
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| 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 |
| TTO | 0.124 | |
| Oil and grease (alternate monitoring parameter) | 1.79 | 1.79 |
Subpart C
Cleaning or Etching Rinse
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| 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 |
| TTO | 0.96 | |
| Oil and grease (alternate monitoring parameter) | 13.91 | 13.91 |
Subpart C
Cleaning or Etching Scrubber Liquor
| Pollutant or pollutant property | PSNS | |
|---|---|---|
| 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 |
| TTO | 1.34 | |
| Oil and grease (alternate monitoring parameter) | 19.33 | 19.33 |
[48 FR 49149, Oct. 24, 1983; 49 FR 11632, 11633, 11634, Mar. 27, 1984]