40 CFR 471.105: Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subject which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in metal powders process wastewater introduced into a POTW shall not exceed the following values:

(a) Metal powder production atomization wastewater.

Subpart J—PSNS

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

(b) Sizing spent emulsions.

Subpart J—PSNS

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

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

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

Subpart J—PSNS

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

(e) Tumbling, burnishing and cleaning wastewater.

Subpart J—PSNS

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

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

(g) Sawing or grinding spent emulsions.

Subpart J—PSNS

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

(h) Sawing or grinding contact cooling water.

Subpart J—PSNS

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 1.620

Cyanide 0.470 0.195

Lead 0.681 0.324

(i) Hot pressing contact cooling water.

Subpart J—PSNS

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

(j) Mixing wet air pollution control scrubber blowdown.

Subpart J—PSNS

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

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