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 Code of Federal Regulations (Last Updated: July 5, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter N - Effluent Guidelines and Standards
 Part 471 - Nonferrous Metals Forming and Metal Powders Point Source Category
 Subpart E - Refractory Metals Forming Subcategory

  § 471.51 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).  

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  • § 471.51 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 neat oils and graphite based lubricants - subpart E - BPT. There shall be no discharge of process wastewater pollutants.

    (b) Rolling spent emulsions.

    Subpart E - BPT

    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
    Copper 0.815 0.429
    Nickel 0.824 0.545
    Fluoride 25.5 11.3
    Molybdenum 2.84 1.47
    Oil and grease 8.58 5.15
    TSS 17.6 8.37
    pH (1) (1)

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

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

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

    (e) Extrusion press hydraulic fluid leakage.

    Subpart E - BPT

    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
    Copper 2.26 1.19
    Nickel 2.29 1.51
    Fluoride 70.8 31.4
    Molybdenum 7.87 4.07
    Oil and grease 23.8 14.3
    TSS 48.8 23.2
    pH (1) (1)

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

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

    (g) Forging contact cooling water.

    Subpart E - BPT

    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
    Copper 0.614 0.323
    Nickel 0.620 0.410
    Fluoride 19.2 8.53
    Molybdenum 2.14 1.11
    Oil and grease 6.46 3.88
    TSS 13.3 6.30
    pH (1) (1)

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

    (h) Equipment cleaning wastewater.

    Subpart E - BPT

    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
    Copper 2.59 1.36
    Nickel 2.61 1.73
    Fluoride 80.9 35.9
    Molybdenum 8.99 4.65
    Oil and grease 27.2 16.3
    TSS 55.8 26.5
    pH (1) (1)

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

    (i) Metal powder production wastewater.

    Subpart E - BPT

    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
    Copper 0.534 0.281
    Nickel 0.540 0.357
    Fluoride 16.70 7.42
    Molybdenum 1.86 0.961
    Oil and grease 5.62 3.37
    TSS 11.5 5.48
    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 - BPT. There shall be no discharge of process wastewater pollutants.

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

    (l) Surface treatment spent baths.

    Subpart E - BPT

    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
    Copper 0.739 0.389
    Nickel 0.747 0.494
    Fluoride 23.2 10.3
    Molybdenum 2.57 1.33
    Oil and grease 7.78 4.68
    TSS 16.0 7.59
    pH (1) (1)

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

    (m) Surface treatment rinse.

    Subpart E - BPT

    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
    Copper 230 121
    Nickel 232 154
    Fluoride 7,200 3,200
    Molybdenum 800 414
    Oil and grease 2,420 1,450
    TSS 4,960 2,360
    pH (1) (1)

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

    (n) Alkaline cleaning spent baths.

    Subpart E - BPT

    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
    Copper 0.635 0.334
    Nickel 0.641 0.424
    Fluoride 19.9 8.82
    Molybdenum 2.21 1.14
    Oil and grease 6.68 4.01
    TSS 13.7 6.51
    pH (1) (1)

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

    (o) Alkaline cleaning rinse.

    Subpart E - BPT

    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
    Copper 1,550 816
    Nickel 1,570 1,040
    Fluoride 48,600 21,600
    Molybdenum 5,400 2,790
    Oil and grease 16,300 9,790
    TSS 33,500 15,900
    pH (1) (1)

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

    (p) Molten salt rinse.

    Subpart E - BPT

    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
    Copper 12.1 6.33
    Nickel 12.2 8.04
    Fluoride 377 167
    Molybdenum 41.9 21.7
    Oil and grease 127 76.0
    TSS 260 124
    pH (1) (1)

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

    (q) Tumbling or burnishing wastewater.

    Subpart E - BPT

    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
    Copper 23.8 12.5
    Nickel 24.0 15.9
    Fluoride 744 330
    Molybdenum 82.7 42.8
    Oil and grease 250 150
    TSS 513 244
    pH (1) (1)

    Within the range of 7.5 to 10.0 at all times.

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

    (s) Sawing or grinding spent emulsions.

    Subpart E - BPT

    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
    Copper 0.565 0.297
    Nickel 0.570 0.377
    Fluoride 17.7 7.84
    Molybdenum 1.97 1.02
    Oil and grease 5.94 3.57
    TSS 12.2 5.79
    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 - BPT

    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
    Copper 46.2 24.3
    Nickel 46.7 30.9
    Fluoride 1450 642
    Molybdenum 161 83.1
    Oil and grease 486 292
    TSS 997 474
    pH (1) (1)

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

    (u) Sawing or grinding rinse.

    Subpart E - BPT

    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
    Copper 0.257 0.135
    Nickel 0.259 0.172
    Fluoride 8.03 3.57
    Molybdenum 0.893 0.462
    Oil and grease 2.70 1.62
    TSS 5.54 2.63
    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 - BPT

    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, surface coated or surface treated
    Copper 1.50 0.787
    Nickel 1.51 1.00
    Fluoride 46.8 20.8
    Molybdenum 5.20 2.69
    Oil and grease 15.8 9.45
    TSS 32.3 15.4
    pH (1) (1)

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

    (w) Miscellaneous wastewater sources.

    Subpart E - BPT

    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
    Copper 0.656 0.345
    Nickel 0.663 0.438
    Fluoride 20.6 9.11
    Molybdenum 2.28 1.18
    Oil and grease 6.9 4.14
    TSS 14.2 6.73
    pH (1) (1)

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

    (x) Dye penetrant testing wastewater.

    Subpart E - BPT

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of refractory metals tested
    Copper 0.150 0.078
    Nickel 0.150 0.099
    Fluoride 4.60 2.00
    Molybdenum 0.513 0.266
    Oil and grease 1.60 0.930
    TSS 3.20 1.50
    pH (1) (1)

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

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

    [50 FR 34270, Aug. 23, 1985; 51 FR 2886, Jan. 22, 1986]