40 CFR 471.103: New source performance standards (NSPS).

Any new source subject to this subpart must achieve the following new source performance standards (NSPS). The mass of pollutants in the metal powder process wastewater shall not exceed the following values:

(a) Metal powder production atom-ization wastewater.

Subpart J—NSPS

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 emulsions.

Subpart J—NSPS

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—NSPS. There shall be no discharge of process wastewater pollutants.

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

Subpart J—NSPS

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 steam treated

Copper 0.151 0.079

Cyanide 0.023 0.010

Lead 0.033 0.016

Oil and grease 1.59 0.951

TSS 3.25 1.55

pH (1) (1)

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

(e) Tumbling, burnishing and cleaning wastewater.

Subpart J—NSPS

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 0.836 0.440

Cyanide 0.128 0.053

Lead 0.185 0.088

Oil and grease 8.80 5.28

TSS 18.1 8.58

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—NSPS. There shall be no discharge of process wastewater pollutants.

(g) Sawing or grinding spent emulsions.

Subpart J—NSPS

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 emulsions

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—NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/off-kg (pounds per million off-pounds) of powder sawed or ground with contact cooling water

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—NSPS

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 1.67 0.880

Cyanide 0.255 0.106

Lead 0.370 0.176

Oil and grease 17.6 10.6

TSS 36.1 17.2

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—NSPS

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—NSPS. There shall be no discharge of process wastewater pollutants.