1. Regulations
  2. title 40
  3. chapter I-i31
  4. part 471
  5. subpart B
  6. § 471.21

Collapse to view only § 471.21 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

§ 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.

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.20

§ 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 Chromiun0.0330.014 Zinc0.1090.046 Ammonia9.954.37 Fluoride4.4401.97 Oil and grease1.490.895 TSS3.061.46 pH( 1)

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 Chromium1.270.520 Zinc4.221.77 Ammonia385170 Fluoride17276.3 Oil and grease57.834.7 TSS11956.4 pH( 1)

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 Chromium0.0180.007 Zinc0.0590.025 Ammonia5.322.34 Fluoride2.381.06 Oil and grease0.7980.479 TSS1.640.778 pH( 1)

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 Chromium1.740.711 Zinc5.772.41 Ammonia527232 Fluoride235105 Oil and grease79.047.4 TSS16277.1 pH( 1)

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 Chromium0.2050.084 Zinc0.6810.285 Ammonia62.127.3 Fluoride27.812.3 Oil and grease9.325.59 TSS19.19.09 pH( 1)

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 Chromium8.323.4 Zinc27.611.5 Ammonia25201110 Fluoride1130499 Oil and grease378227 TSS775369 pH( 1)

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 Chromium0.0090.004 Zinc0.0290.012 Ammonia2.601.15 Fluoride1.160.515 Oil and grease0.3900.234 TSS0.8000.381 pH( 1)

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 Chromium0.2730.112 Zinc0.9040.378 Ammonia82.536.3 Fluoride36.916.4 Oil and grease12.47.43 TSS25.412.1 pH( 1)

1 Within the range of 7.5 to 10.0 at all times.

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.21

§ 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 Chromium0.0330.014 Zinc0.1090.046 Ammonia9.954.37 Fluoride4.441.97

(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 Chromium0.1270.052 Zinc0.4220.177 Ammonia38.517.0 Fluoride17.27.63

(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 Chromium0.0020.0007 Zinc0.0060.003 Ammonia0.5320.234 Fluoride0.2380.106

(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 Chromium1.740.711 Zinc5.772.41 Ammonia527232 Fluoride235105

(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 Chromium0.2050.084 Zinc0.6810.285 Ammonia62.127.3 Fluoride27.812.3

(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 Chromium0.8320.340 Zinc2.761.16 Ammonia252111 Fluoride11349.9

(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 Chromium0.0090.004 Zinc0.0290.012 Ammonia2.601.15 Fluoride1.160.515

(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 Chromium0.2730.112 Zinc0.9040.378 Ammonia82.536.3 Fluoride36.916.4

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.22

§ 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 Chromium0.0280.011 Zinc0.0760.032 Ammonia9.954.37 Fluoride4.441.97 Oil and grease0.7460.746 TSS1.120.895 pH( 1)( 1)

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 Chromium0.1070.044 Zinc0.2950.122 Ammonia38.517.0 Fluoride17.27.63 Oil and grease2.892.89 TSS4.343.47 pH( 1)( 1)

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 Chromium0.0020.0006 Zinc0.0040.002 Ammonia0.5320.234 Fluoride0.2380.106 Oil and grease0.0400.040 TSS0.0600.048 pH( 1)( 1)

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 Chromium1.460.593 Zinc4.031.66 Ammonia527232 Fluoride235105 Oil and grease39.539.5 TSS59.347.4 pH( 1)( 1)

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 Chromium0.1730.070 Zinc0.4760.196 Ammonia62.127.3 Fluoride27.812.3 Oil and grease4.664.66 TSS6.995.60 pH( 1)( 1)

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 Chromium0.7000.284 Zinc1.930.794 Ammonia252111 Fluoride11349 Oil and grease18.918.9 TSS28.422.7 pH( 1)( 1)

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 Chromium0.0070.003 Zinc0.0200.008 Ammonia2.601.15 Fluoride1.160.515 Oil and grease0.1950.195 TSS0.2930.234 pH( 1)( 1)

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 Chromium0.2290.093 Zinc0.6320.260 Ammonia82.536.3 Fluoride36.916.4 Oil and grease6.196.19 TSS9.297.43 pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.23

§ 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 Chromium0.0330.014 Zinc0.1090.046 Ammonia9.954.37 Fluoride4.441.97

(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 Chromium0.1270.052 Zinc0.4220.177 Ammonia38.517.0 Fluoride17.27.63

(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 Chromium0.0020.0007 Zinc0.0060.003 Ammonia0.5320.234 Fluoride0.2380.106

(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 Chromiun1.740.711 Zinc5.772.41 Ammonia527232 Fluoride235105

(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 Chromiun0.2050.084 Zinc0.6810.285 Ammonia62.127.3 Fluoride27.812.3

(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 Chromiun0.8320.340 Zinc2.761.16 Ammonia252111 Fluoride11349.9

(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 Chromiun0.0090.004 Zinc0.0290.012 Ammonia2.601.15 Fluoride1.160.515

(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 Chromium0.2730.112 Zinc0.9040.378 Ammonia8.2536.3 Fluoride36.916.4
[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.24

§ 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 Chromium0.0280.011 Zinc0.0760.032 Ammonia9.954.37 Fluoride4.441.97

(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 Chromium0.1070.044 Zinc0.2950.122 Ammonia38.517.0 Fluoride17.27.63

(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 Chromium0.0020.0006 Zinc0.0040.002 Ammonia0.5320.234 Fluoride0.2380.106

(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 Chromium1.460.593 Zinc4.031.66 Ammonia527232 Fluoride235105

(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 Chromium0.1730.070 Zinc0.4760.196 Ammonia62.127.3 Fluoride27.812.3

(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 Chromium0.7000.284 Zinc1.930.794 Ammonia252111 Fluoride11349.9

(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 Chromium0.0070.003 Zinc0.0200.008 Ammonia2.601.15 Fluoride1.160.515

(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 Chromium0.2290.093 Zinc0.6320.260 Ammonia82.536.3 Fluoride36.916.4
[50 FR 34270, Aug. 23, 1985; 51 FR 2884, Jan. 22, 1986]

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.25

§ 471.26 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT). [Reserved]

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307, 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) (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217.

SOURCE: 50 FR 34270, Aug. 23, 1985, unless otherwise noted.

CITE AS: 40 CFR 471.26