Collapse to view only § 471.24 - Pretreatment standards for existing sources (PSES).
- § 471.20 - Applicability; description of the magnesium forming subcategory.
- § 471.21 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
- § 471.22 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
- § 471.23 - New source performance standards (NSPS).
- § 471.24 - Pretreatment standards for existing sources (PSES).
- § 471.25 - Pretreatment standards for new sources (PSNS).
- § 471.26 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT). [Reserved]
§ 471.20 - Applicability; description of the magnesium forming subcategory.
This subpart applies to discharges of pollutants to waters of the United States, and introductions of pollutants into publicly owned treatment works from the process operations of the magnesium forming subcategory.
§ 471.21 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
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 for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):
(a) Rolling spent emulsions.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium rolled with emulsions | Chromiun | 0.033 | 0.014 | Zinc | 0.109 | 0.046 | Ammonia | 9.95 | 4.37 | Fluoride | 4.440 | 1.97 | Oil and grease | 1.49 | 0.895 | TSS | 3.06 | 1.46 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(b) Forging spent lubricants—subpart B—BPT. There shall be no discharge of process wastewater pollutants.
(c) Forging contact cooling water.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of forged magnesium cooled with water | Chromium | 1.27 | 0.520 | Zinc | 4.22 | 1.77 | Ammonia | 385 | 170 | Fluoride | 172 | 76.3 | Oil and grease | 57.8 | 34.7 | TSS | 119 | 56.4 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(d) Forging equipment cleaning wastewater.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium forged | Chromium | 0.018 | 0.007 | Zinc | 0.059 | 0.025 | Ammonia | 5.32 | 2.34 | Fluoride | 2.38 | 1.06 | Oil and grease | 0.798 | 0.479 | TSS | 1.64 | 0.778 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(e) Direct chill casting contact cooling water.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods | Chromium | 1.74 | 0.711 | Zinc | 5.77 | 2.41 | Ammonia | 527 | 232 | Fluoride | 235 | 105 | Oil and grease | 79.0 | 47.4 | TSS | 162 | 77.1 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(f) Surface treatment spent baths.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 0.205 | 0.084 | Zinc | 0.681 | 0.285 | Ammonia | 62.1 | 27.3 | Fluoride | 27.8 | 12.3 | Oil and grease | 9.32 | 5.59 | TSS | 19.1 | 9.09 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(g) Surface treatment rinse.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 8.32 | 3.4 | Zinc | 27.6 | 11.5 | Ammonia | 2520 | 1110 | Fluoride | 1130 | 499 | Oil and grease | 378 | 227 | TSS | 775 | 369 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(h) Sawing or grinding spent emulsions.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground | Chromium | 0.009 | 0.004 | Zinc | 0.029 | 0.012 | Ammonia | 2.60 | 1.15 | Fluoride | 1.16 | 0.515 | Oil and grease | 0.390 | 0.234 | TSS | 0.800 | 0.381 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(i) Degreasing spent solvents—subpart B—BPT. There shall be no discharge of process wastewater pollutants.
(j) Wet air pollution control scrubber blowdown.
Subpart B—BPT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged | Chromium | 0.273 | 0.112 | Zinc | 0.904 | 0.378 | Ammonia | 82.5 | 36.3 | Fluoride | 36.9 | 16.4 | Oil and grease | 12.4 | 7.43 | TSS | 25.4 | 12.1 | pH | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
§ 471.22 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
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 (BAT):
(a) Rolling spent emulsions.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium rolled with emulsions | Chromium | 0.033 | 0.014 | Zinc | 0.109 | 0.046 | Ammonia | 9.95 | 4.37 | Fluoride | 4.44 | 1.97 |
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(b) Forging spent lubricants—subpart B—BAT. There shall be no discharge of process wastewater pollutants.
(c) Forging contact cooling water.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of forged magnesium cooled with water | Chromium | 0.127 | 0.052 | Zinc | 0.422 | 0.177 | Ammonia | 38.5 | 17.0 | Fluoride | 17.2 | 7.63 |
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(d) Forging equipment cleaning wastewater.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium forged | Chromium | 0.002 | 0.0007 | Zinc | 0.006 | 0.003 | Ammonia | 0.532 | 0.234 | Fluoride | 0.238 | 0.106 |
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(e) Direct chill casting contact cooling water.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods | Chromium | 1.74 | 0.711 | Zinc | 5.77 | 2.41 | Ammonia | 527 | 232 | Fluoride | 235 | 105 |
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(f) Surface treatment spent baths.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 0.205 | 0.084 | Zinc | 0.681 | 0.285 | Ammonia | 62.1 | 27.3 | Fluoride | 27.8 | 12.3 |
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(g) Surface treatment rinse.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 0.832 | 0.340 | Zinc | 2.76 | 1.16 | Ammonia | 252 | 111 | Fluoride | 113 | 49.9 |
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(h) Sawing or grinding spent emulsions.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground | Chromium | 0.009 | 0.004 | Zinc | 0.029 | 0.012 | Ammonia | 2.60 | 1.15 | Fluoride | 1.16 | 0.515 |
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(i) Degreasing spent solvents—subpart B—BAT. There shall be no discharge of process wastewater pollutants.
(j) Wet air pollution control scrubber blowdown.
Subpart B—BAT
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged | Chromium | 0.273 | 0.112 | Zinc | 0.904 | 0.378 | Ammonia | 82.5 | 36.3 | Fluoride | 36.9 | 16.4 |
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§ 471.23 - New source performance standards (NSPS).
Any new source subject to this subpart must achieve the following new source performance standards. The mass of pollutants in the magnesium forming process wastewater shall not exceed the following values:
(a) Rolling spent emulsions.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off/kg (pounds per million off-pounds) of magnesium rolled with emulsions | Chromium | 0.028 | 0.011 | Zinc | 0.076 | 0.032 | Ammonia | 9.95 | 4.37 | Fluoride | 4.44 | 1.97 | Oil and grease | 0.746 | 0.746 | TSS | 1.12 | 0.895 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(b) Forging spent lubricants—subpart B—NSPS. There shall be no discharge of process wastewater pollutants.
(c) Forging contact cooling water.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off/kg (pounds per million off-pounds) of forged magnesium cooled with water | Chromium | 0.107 | 0.044 | Zinc | 0.295 | 0.122 | Ammonia | 38.5 | 17.0 | Fluoride | 17.2 | 7.63 | Oil and grease | 2.89 | 2.89 | TSS | 4.34 | 3.47 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(d) Forging equipment cleaning wastewater.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off/kg (pounds per million off-pounds) of magnesium forged | Chromium | 0.002 | 0.0006 | Zinc | 0.004 | 0.002 | Ammonia | 0.532 | 0.234 | Fluoride | 0.238 | 0.106 | Oil and grease | 0.040 | 0.040 | TSS | 0.060 | 0.048 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(e) Direct chill casting contact cooling water.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods | Chromium | 1.46 | 0.593 | Zinc | 4.03 | 1.66 | Ammonia | 527 | 232 | Fluoride | 235 | 105 | Oil and grease | 39.5 | 39.5 | TSS | 59.3 | 47.4 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(f) Surface treatment spent baths.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 0.173 | 0.070 | Zinc | 0.476 | 0.196 | Ammonia | 62.1 | 27.3 | Fluoride | 27.8 | 12.3 | Oil and grease | 4.66 | 4.66 | TSS | 6.99 | 5.60 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times
(g) Surface treatment rinse.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pound pers million off-pounds) of magnesium surface treated | Chromium | 0.700 | 0.284 | Zinc | 1.93 | 0.794 | Ammonia | 252 | 111 | Fluoride | 113 | 49 | Oil and grease | 18.9 | 18.9 | TSS | 28.4 | 22.7 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times
(h) Sawing or grinding spent emulsions.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground | Chromium | 0.007 | 0.003 | Zinc | 0.020 | 0.008 | Ammonia | 2.60 | 1.15 | Fluoride | 1.16 | 0.515 | Oil and grease | 0.195 | 0.195 | TSS | 0.293 | 0.234 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
(i) Degreasing spent Solvents—subpart B—NSPS. There shall be no discharge of process wastewater pollutants.
(j) Wet air pollution control scrubber blowdown.
Subpart B—NSPS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged | Chromium | 0.229 | 0.093 | Zinc | 0.632 | 0.260 | Ammonia | 82.5 | 36.3 | Fluoride | 36.9 | 16.4 | Oil and grease | 6.19 | 6.19 | TSS | 9.29 | 7.43 | pH | ( 1) | ( 1) |
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1 Within the range of 7.5 to 10.0 at all times.
§ 471.24 - Pretreatment standards for existing sources (PSES).
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 by August 23, 1988 achieve the following pretreatment standards for existing sources (PSES). The mass of wastewater pollutants in magnesium forming process wastewater introduced into a POTW shall not exceed the following values:
(a) Rolling spent emulsions.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium rolled with emulsions | Chromium | 0.033 | 0.014 | Zinc | 0.109 | 0.046 | Ammonia | 9.95 | 4.37 | Fluoride | 4.44 | 1.97 |
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(b) Forging spent lubricants—subpart B—PSE. There shall be no discharge of process wastewater pollutants.
(c) Forging contact cooling water.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium cooled with water | Chromium | 0.127 | 0.052 | Zinc | 0.422 | 0.177 | Ammonia | 38.5 | 17.0 | Fluoride | 17.2 | 7.63 |
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(d) Forging equipment cleaning wastewater.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium forged | Chromium | 0.002 | 0.0007 | Zinc | 0.006 | 0.003 | Ammonia | 0.532 | 0.234 | Fluoride | 0.238 | 0.106 |
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(e) Direct chill casting contact cooling water.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods | Chromiun | 1.74 | 0.711 | Zinc | 5.77 | 2.41 | Ammonia | 527 | 232 | Fluoride | 235 | 105 |
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(f) Surface treatment spent baths.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromiun | 0.205 | 0.084 | Zinc | 0.681 | 0.285 | Ammonia | 62.1 | 27.3 | Fluoride | 27.8 | 12.3 |
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(g) Surface treatment rinse.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromiun | 0.832 | 0.340 | Zinc | 2.76 | 1.16 | Ammonia | 252 | 111 | Fluoride | 113 | 49.9 |
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(h) Sawing or grinding spent emulsions.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground | Chromiun | 0.009 | 0.004 | Zinc | 0.029 | 0.012 | Ammonia | 2.60 | 1.15 | Fluoride | 1.16 | 0.515 |
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(i) Degreasing Spent Solvents—subpart B—PSES. There shall be no discharge of process wastewater pollutants.
(j) Wet air pollution control scrubber blowdown.
Subpart B—PSES
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged | Chromium | 0.273 | 0.112 | Zinc | 0.904 | 0.378 | Ammonia | 8.25 | 36.3 | Fluoride | 36.9 | 16.4 |
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§ 471.25 - Pretreatment standards for new sources (PSNS).
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 (PSNS). The mass of wastewater pollutants in magnesium forming process wastewater introduced into a POTW shall not exceed the following values:
(a) Rolling spent emulsions.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium rolled with emulsions | Chromium | 0.028 | 0.011 | Zinc | 0.076 | 0.032 | Ammonia | 9.95 | 4.37 | Fluoride | 4.44 | 1.97 |
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(b) Forging spent lubricants—subpart B—PSNS. There shall be no discharge of process wastewater pollutants.
(c) Forging contact cooling water.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of forged magnesium cooled with water | Chromium | 0.107 | 0.044 | Zinc | 0.295 | 0.122 | Ammonia | 38.5 | 17.0 | Fluoride | 17.2 | 7.63 |
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(d) Forging equipment cleaning wastewater.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium forged | Chromium | 0.002 | 0.0006 | Zinc | 0.004 | 0.002 | Ammonia | 0.532 | 0.234 | Fluoride | 0.238 | 0.106 |
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(e) Direct chill casting contact cooling water.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium cast with direct chill methods | Chromium | 1.46 | 0.593 | Zinc | 4.03 | 1.66 | Ammonia | 527 | 232 | Fluoride | 235 | 105 |
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(f) Surface treatment spent baths.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 0.173 | 0.070 | Zinc | 0.476 | 0.196 | Ammonia | 62.1 | 27.3 | Fluoride | 27.8 | 12.3 |
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(g) Surface treatment rinse.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium surface treated | Chromium | 0.700 | 0.284 | Zinc | 1.93 | 0.794 | Ammonia | 252 | 111 | Fluoride | 113 | 49.9 |
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(h) Sawing or grinding spent emulsions.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sawed or ground | Chromium | 0.007 | 0.003 | Zinc | 0.020 | 0.008 | Ammonia | 2.60 | 1.15 | Fluoride | 1.16 | 0.515 |
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(i) Degreasing spent solvents—subpart B—PSNS. There shall be no discharge of process wastewater pollutants.
(j) Wet air pollution control scrubber blowdown.
Subpart B—PSNS
Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | mg/off-kg (pounds per million off-pounds) of magnesium sanded and repaired or forged | Chromium | 0.229 | 0.093 | Zinc | 0.632 | 0.260 | Ammonia | 82.5 | 36.3 | Fluoride | 36.9 | 16.4 |
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