40 CFR 471.104: Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and by August 23, 1988 achieve the following pretreatment standards for existing sources (PSES). 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—PSES

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 5.040

Cyanide 1.46 0.605

Lead 2.12 1.01

(b) Sizing spent emulsions.

Subpart J—PSES

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—PSES.

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

Subpart J—PSES

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

mg/off-kg (pounds per million off-pounds) of powder metallurgy part steam treated

Copper 1.51 0.792

Cyanide 0.230 0.095

Lead 0.333 0.159

(e) Tumbling, burnishing and cleaning wastewater.

Subpart J—PSES

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

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

(g) Sawing or grinding spent emulsions.

Subpart J—PSES

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—PSES

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

(i) Hot pressing contact cooling water.

Subpart J—PSES

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

(j) Mixing wet air pollution control scrubber blowdown.

Subpart J—PSES

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