Regulations last checked for updates: May 18, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 471Subpart E - Subpart E—Refractory Metals Forming Subcategory
View all text of Subpart E [§ 471.50 - § 471.56]
§ 471.53 - New source performance standards (NSPS).

Any new source subject to this subpart must achieve the following new source performance standards (NSPS):

(a) Rolling spent neat oils and graphite based lubricants—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(b) Rolling spent emulsions.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals rolled with emulsions
Copper0.5490.262
Nickel0.2360.159
Fluoride25.511.3
Molybdenum2.160.957
Oil and grease4.294.29
TSS6.445.15
pH( 1)( 1)

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

(c) Drawing spent lubricants—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(d) Extrusion spent lubricants—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(e) Extrusion press hydraulic fluid leakage.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals extruded
Copper1.530.726
Nickel0.6550.441
Fluoride70.831.4
Molybdenum5.992.66
Oil and grease11.911.9
TSS17.914.3
pH( 1)( 1)

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

(f) Forging spent lubricants—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(g) Forging contact cooling water.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of forged refractory metals cooled with water
Copper0.0410.020
Nickel0.0180.012
Fluoride1.920.853
Molybdenum0.1630.072
Oil and grease0.3230.323
TSS0.4850.388
pH( 1)( 1)

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

(h) Equipment cleaning wastewater.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals formed
Copper0.1740.083
Nickel0.0750.051
Fluoride8.093.59
Molybdenum0.6840.303
Oil and grease1.361.36
TSS2.041.63
pH( 1)( 1)

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

(i) Metal powder production wastewater.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals powder produced
Copper0.3600.172
Nickel0.1550.104
Fluoride16.77.42
Molybdenum1.420.627
Oil and grease2.812.81
TSS4.223.37
pH( 1)( 1)

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

(j) Metal powder production floor wash wastewater—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(k) Metal powder pressing spent lubricants—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(l) Surface treatment spent baths.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals surface treated
Copper0.4980.237
Nickel0.2140.144
Fluoride23.210.3
Molybdenum1.960.868
Oil and grease3.893.89
TSS5.844.67
pH( 1)( 1)

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

(m) Surface treatment rinse.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals surface treated
Copper15.57.38
Nickel6.664.48
Fluoride720320
Molybdenum69.927.0
Oil and grease121121
TSS182145
pH( 1)( 1)

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

(n) Alkaline cleaning spent baths.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned
Copper0.4280.204
Nickel.1840.124
Fluoride19.98.82
Molybdenum1.680.745
Oil and grease3.343.34
TSS5.014.01
pH( 1)( 1)

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

(o) Alkaline cleaning rinse.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals alkaline cleaned
Copper10.54.98
Nickel4.493.02
Fluoride486216
Molybdenum41.118.2
Oil and grease81.681.6
TSS12397.9
pH( 1)( 1)

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

(p) Molten salt rinse.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals treated with molten salt
Copper0.8100.386
Nickel0.3480.234
Fluoride37.716.7
Molybdenum3.191.41
Oil and grease6.336.33
TSS9.57.6
pH( 1)( 1)

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

(q) Tumbling or burnishing wastewater.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals tumbled or burnished
Copper1.600.763
Nickel0.6880.463
Fluoride74.433.0
Molybdenum6.292.79
Oil and grease12.512.5
TSS18.815.0
pH( 1)( 1)

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

(r) Sawing or grinding spent neat oils—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

(s) Sawing or grinding spent emulsions.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with emulsions
Copper0.3800.181
Nickel0.1640.110
Fluoride17.77.84
Molybdenum1.50.663
Oil and grease2.972.97
TSS4.463.57
pH( 1)( 1)

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

(t) Sawing or grinding contact cooling water.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals sawed or ground with contact cooling water
Copper3.111.48
Nickel1.340.899
Fluoride14564.2
Molybdenum12.25.42
Oil and grease24.324.3
TSS36.529.2
pH( 1)( 1)

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

(u) Sawing or grinding rinse.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of sawed or ground refractory metals rinsed
Copper0.0180.009
Nickel0.0080.005
Fluoride0.8030.357
Molybdenum0.0680.030
Oil and grease0.1350.135
TSS0.2030.162
pH( 1)( 1)

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

(v) Wet air pollution control scrubber blowdown.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals sawed, ground, surface coated or surface treated
Copper1.010.480
Nickel0.4330.291
Fluoride46.820.8
Molybdenum3.961.76
Oil and grease7.877.87
TSS11.89.45
pH( 1)( 1)

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

(w) Miscellaneous wastewater sources.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals formed
Copper0.4420.211
Nickel0.1900.128
Fluoride20.69.11
Molybdenum1.740.770
Oil and grease3.453.45
TSS5.184.14
pH( 1)( 1)

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

(x) Dye penetrant testing wastewater.

Subpart E—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of refractory metals product tested
Copper0.1000.048
Nickel0.0430.029
Fluoride4.622.05
Molybdenum0.3910.173
Oil and grease0.7760.776
TSS1.170.931
pH( 1)( 1)

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

(y) Degreasing spent solvents—subpart E—NSPS. There shall be no discharge of process wastewater pollutants.

[50 FR 34270, Aug. 23, 1985; 51 FR 2886, 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,c,e,and, 1316(b) andc,and; 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 471.53
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