40 CFR § 471.101
Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)
June 9, 2020
CFR

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) Metal powder production atomization wastewater.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder wet atomized
Copper 9.58 5.04
Cyanide 1.46 0.605
Lead 2.12 1.01
Oil and grease 101 60.5
TSS 207 98.3
pH (1) (1)

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

(b) Sizing spent emulsion.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder sized
Copper 0.028 0.015
Cyanide 0.004 0.002
Lead 0.006 0.003
Oil and grease 0.292 0.175
TSS 0.599 0.285
pH (1) (1)

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

(c) Oil-resin impregnation wastewater—subpart J—BPT. There shall be no discharge of process wastewater pollutants.

(d) Steam treatment wet air pollution control scrubber blowdown.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of power metallurgy parts steam treated
Copper 1.51 0.792
Cyanide 0.230 0.095
Lead 0.333 0.159
Oil and grease 15.9 9.51
TSS 32.5 15.5
pH (1) (1)

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

(e) Tumbling, burnishing and cleaning wastewater.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder metallurgy parts tumbled, burnished, or cleaned
Copper 8.36 4.40
Cyanide 1.28 0.528
Lead 1.85 0.880
Oil and grease 88.0 52.800
TSS 181 85.8
pH (1) (1)

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

(f) Sawing or grinding spent neat oils—subpart J—BPT. There shall be no discharge of process wastewater pollutants.

(g) Sawing or grinding spent emulsion.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with emulsion
Copper 0.035 0.018
Cyanide 0.005 0.002
Lead 0.008 0.004
Oil and grease 0.362 0.217
TSS 0.742 0.353
pH (1) (1)

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

(h) Sawing or grinding contact cooling water.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder metallurgy parts sawed or ground with contact cooling
Copper 3.08 1.62
Cyanide 0.470 0.195
Lead 0.681 0.324
Oil and grease 32.4 19.5
TSS 66.4 31.6
pH (1) (1)

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

(i) Hot pressing contact cooling water.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder cooled after pressing
Copper 16.7 8.80
Cyanide 2.55 1.06
Lead 3.70 1.76
Oil and grease 176 106
TSS 361 172
pH (1) (1)

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

(j) Mixing wet air pollution control scrubber blowdown.

Subpart J—BPT

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    mg/off-kg (pounds per million off-pounds) of powder mixed
Copper 15.0 7.90
Cyanide 2.29 0.948
Lead 3.32 1.58
Oil and grease 158 94.8
TSS 324 154
pH (1) (1)

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

(k) Degreasing spent solvents—subpart J—BPT. There shall be no discharge of process wastewater pollutants.

[50 FR 34270, Aug. 23, 1985; 51 FR 2889, Jan. 22, 1986]


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