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).

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

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)

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

(b) Sizing spent emulsion.

Subpart J—BPT

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)

1 Within 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

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)

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

(e) Tumbling, burnishing and cleaning wastewater.

Subpart J—BPT

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)

1 Within 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

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)

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

(h) Sawing or grinding contact cooling water.

Subpart J—BPT

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)

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

(i) Hot pressing contact cooling water.

Subpart J—BPT

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)

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

(j) Mixing wet air pollution control scrubber blowdown.

Subpart J—BPT

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)

1 Within 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.